best solar panels for yachts

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What You Need To Know About Boat Solar Panels

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Sunshine and boats are a natural together, so why not use all that free energy? Here’s the lowdown on solar panel selection and installation

I first embraced the idea of solar power while up a pole (literally) in the Atlantic Intracoastal Waterway replacing dead batteries. It was the early 1980s, and I was maintaining buoys, beacons, and other such Aids To Navigation (ATON) for the U.S. Coast Guard, replacing massive, nonrechargeable batteries with rechargeable solar-powered ones. The higher-ups said the solar rechargeables would last six years – twice as long as the one-shot batteries. As the deck-ape in charge of lugging all those batteries up and down the ladders, my back and I immediately appreciated the whole “free power from the sun” thing, a concept I continue to embrace.

The strategy behind s olar energy onboard is simple: A solar panel converts sunlight into electricity, after which wiring conducts it to your batteries for storage until needed. Solar panels are used to keep batteries or banks charged rather than to power equipment directly. This arrangement allows the panels to store generated power whenever produced, while providing a steady source of power to a piece of equipment even when the panel is producing no power.

While they do require an initial outlay, solar panels can easily pay for themselves in money saved and independence gained over their service life. They’re noiseless, have no moving parts, and they provide free electricity for years with minimal maintenance. Solar panels also have the benefit of being modular, letting you start small and add more as your power requirements increase.

The benefits of solar

Almost any boat can benefit from solar power. Whether at a slip, mooring, or on a trailer, boats can keep their batteries topped off without the need for external power. You can also use solar power to supplement or even replace other onboard charging sources, reducing or eliminating the need to run engines or generators to keep batteries topped off (a wasteful practice that burns fuel while wearing down the costliest pieces of equipment onboard).

While underway, it’s a plus to be able to recharge a dead battery in an emergency – say, to operate a VHF radio or navigation gear. While dockside, solar panels keep batteries charged and vital systems (such as bilge pumps) up and running without the need for shore power.

Just about any boat can benefit from solar power, whether it’s to keep batteries topped off or supplement other onboard charging sources.

Mount solar panels where they are exposed to maximum sunlight but do not interfere with operation of the vessel. 

Bottom: Something as simple as the shadow of a line or shroud can reduce or halt output.

Types of panels

Solar panels contain photovoltaic cells – small silicon semiconductor devices that convert sunlight into electricity. Each cell generates between 0.45 and 0.5 volts, depending on exposure to direct sunlight. Cell size determines amperage, with a 3-inch cell producing roughly 2 amps, a 4-inch cell a little over 3 amps, and a 5-inch cell around 5 amps.

Construction-wise, the three main types of solar panels are monocrystalline, polycrystalline, and amorphous (or thin-film) technology.

Monocrystalline panels have been around the longest and remain the most popular. The panels are constructed of thin slices of crystal silicon (each cell is cut from a single crystal) housed in a rigid, aluminum frame and covered with tempered shatterproof glass. The panels have a uniform black, blue, or gray appearance and are generally quite rugged, although they can be cracked or broken if subjected to extreme abuse.

Monocrystalline panels have the longest service life of the three types. With a conversion efficiency of around 17%, they’re also the most efficient and have the highest electrical output per area, but they are also the most expensive.

Polycrystalline cells are sliced from a cast silicon block and have a shattered glass appearance. Built in much the same way as monocrystalline panels, they’re rectangular, giving the panel itself a tiled look. Their life span is similar to monocrystalline panels, and while their conversion efficiency is lower (by 14%), they’re also a bit less expensive.

Amorphous panels are made by placing a thin film of active silicon on a solid or flexible backing (such as stainless or aluminum sheeting) depending on whether the panel is to be rigid-framed and glass-fronted or flexible. Flexible amorphous panels, in which cells are sandwiched between rubber and polymer covers, are light and tough enough that you can walk on them and, in some cases, even roll them up for storage.

This type of solar panel is also better if shade is an issue. With crystalline panels, even the thin shadow of a rope or shroud across one cell can reduce or halt output of an entire module. Amorphous panels have “bypass” diodes that essentially turn off shaded cells and provide a current path around them. Some monocrystalline panels also have bypass diodes, but this feature comes at an increase in cost.

Amorphous panels are the least expensive of the three types, but their efficiency is also lower – around 8%, or roughly half that of a monocrystalline type. This lower output is somewhat mitigated in newer panels, however, which use three-layer construction. Each layer absorbs different colors of the solar spectrum, so the panel will deliver more power longer each day and during lower light conditions than the other two types.

The charge controller should be mounted below decks and as close to the battery as possible. 

Follow manufacturer instructions for wire connections.

Planning the system

While factors such as cost, mounting options, and output are important, a successful installation depends on knowing what you want the system to accomplish. Is the goal to float-charge a single battery or supplement an overall vessel energy plan? Answering these questions up front will help determine the type, size, and number of panels required.

To understand the process better, let’s walk through the basic steps to determine power requirements and installation considerations for a single solar panel installation. While the example itself is simple, the steps are the same used to plan more complicated installations.

For our example, the goal is to install a solar panel to provide charging for a single 12-volt, 100-amp-hour wet-cell battery used to power an automatic anchor light on a moored vessel.

The first step is compiling a daily power consumption estimate to determine how much solar power is needed.

The daily self-discharge rate for a wet-cell battery is roughly 1%, meaning our 100-amp-hour battery requires one amp every 24 hours just to maintain the status quo. The anchor light draws 50 milliamps per hour of operation, and we’ll assume it operates 10 hours each night. Multiplying current draw (50 milliamps) by hours of daily operation (10) generates a daily energy expense of 500 milliamps or .5 amps.

This means our solar panel must meet a minimum daily energy tab of 1.5 amps – one amp of battery self-discharge rate plus .5 amps of power draw for the anchor light.

Next up is figuring out panel size and the best mounting location. For our example, let’s assume the panel will be a horizontal, fixed-mount installation. A 10-watt horizontally mounted panel should generate between 3- and 5-amp hours per day.

We’ll need at least 13 volts to fully charge our 12-volt battery. As most solar cells generate at least 0.45 volts, you’ll want a panel with a minimum of 33 cells, which should provide around 14.85 volts.

Keep in mind that’s the minimum needed, which may not be enough once you factor in a few cloudy days. Most panels are designed to generate between 15 and 20 volts to overcome problems like cloudy days or inherent electrical resistance within the panel or installation components. While this higher voltage lets you make up for less electrically productive days, it also means you’ll want to install a solar charge controller (voltage regulator) to avoid battery damage due to overcharging.

Attempts to plan a system that tries to use the output of the panel and capacity of the battery to prevent overcharging (and avoid the installation of a charge controller) is false economy and should not be done. The system will never meet its full output potential and, worst case, can damage the battery due to overcharging.

A word on ‘charge controller confliction’

If your vessel has multiple charging sources, such as solar panels and a wind turbine, a crucial but often overlooked consideration is “charge controller confliction.” In short, this is an issue where the charge controller for your solar panel and the charge controller for your wind turbine are internally adjusted to the same maximum charge voltage set point. This means they are constantly fighting each other to be the dominant power source, which results in diminished overall charging output and performance. An in-depth article on this issue can be found at ­missioncriticalenergy.com (in the website footer, click “Superwind Turbine Manuals & Technical Bulletins.” Under the header “Charge Controllers,” select the document “Resolving Charge Controller Confliction”).

While this article addresses charge controller confliction at remote, off-grid sites, the information provided is also applicable to vessel installations. — F.L.

Location and mounting

Solar panels should be mounted in a location where they are exposed to the maximum amount of sunlight but do not interfere with operation of the vessel or the movement of passengers and crew. Solar panels will typically be either fixed or mounted on some type of movable bracket that allows you to actively point the panel toward the sun for maximum output. Both methods have their pros and cons. Fixed panels (which are normally mounted horizontally) don’t produce as much power as a panel that can be adjusted to face the sun. The downside is that adjustable panels must be aimed throughout the day to maximize their output.

Use good quality, marine-grade heat shrink connectors (top) and liquid electrical tape (right) to create airtight, waterproof seals and reduce corrosion.

Installation

After choosing and mounting your panel, it’s time to connect it. The first thing you need to determine is the size (gauge) of the wiring to be used. Multiply your panel’s rated amp output by 1.25 (which adds a 25% safety factor). Then measure the length of the entire wiring run, panel to battery, and multiply by 2. Once you have these two numbers, refer to the American Boat and Yacht Council’s (ABYC) 3% voltage-drop table for wire size. Ancor Products offers a handy wire calculator on its website ( ancorproducts.com/resources ).

Always use good quality marine grade connectors  and tinned, multi-stranded copper wire with vinyl sheathing. The wire will run from the solar panel to the charge controller first, then to the battery. Try to keep the wire run as short as possible, and if it transits an external deck or cabin house (it likely will), be sure to use an appropriate weatherproof deck fitting.

The charge controller should be mounted below decks and as close to the battery as possible. You’ll always want to follow the manufacturer’s instructions for connections, but in a typical installation you’ll connect the solar panel’s positive (red wire) lead to the charge controller’s positive input wire or terminal and the negative (black wire) lead to the charge controller’s negative input wire or terminal.

Next, connect the charge controller’s negative output to the battery negative terminal and the controller’s positive output to the battery’s positive terminal via an appropriately sized in-line fuse (or circuit breaker). ABYC recommends these be installed within 7 inches of connection to the battery or other point in the DC system. To reiterate, the installation of the charge controller can vary among models, so follow the manufacturer’s installation instructions.

Finally, ensure all connections are waterproof and secure any loose wire runs with wire ties and cable clamps for a neat installation. Then get ready to lean back and soak up some free sun.

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Frank Lanier

Contributing Editor, BoatUS Magazine

Capt. Frank Lanier is a SAMS Accredited Marine Surveyor with more than 40 years of experience in the marine and diving industries. He’s also an author, public speaker, and multiple award-winning journalist whose articles on boat maintenance, repair, and seamanship appear regularly in numerous marine publications worldwide. He can be reached via his YouTube channel “Everything Boats with Capt. Frank Lanier” and website captfklanier.com.

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Yachting Monthly

• Digital edition

Sailing with solar power: A practical guide

• Duncan Kent
• November 13, 2020

The latest solar technology makes self-sufficient cruising much more achievable. Duncan Kent gives the lowdown on everything you need to get your boat sorted

SOLAR POWER ON BOARD

Solar power is fast becoming the most popular and economic method of keeping the batteries charged on a boat.

Particularly now that the efficiency of photovoltaic (PV) panels, charge controllers and batteries is improving every day.

Furthermore, the latest technology in regulators and charge controllers has brought about a noticeable increase in useable power output, so the problems of shading and non-alignment can be compensated for more easily.

Not only has PV equipment become more efficient and cost-effective, but many of the modern devices we want to use on a boat have become less power hungry.

This means it is now far easier to provide your entire yacht’s electrical needs, both 220Vac and 12/24Vdc, from natural energy resources – particularly solar power, even if you are planning on a fully electric boat .

Thinking carefully about how much power you need and how much your boat can accommodate is key to planning a solar array. Credit: Graham Snook

WHAT DO YOU NEED?

For instance, a boat with two new, good quality, deep-cycle house batteries of 100Ah each would supply 100Ah of energy to consume between charges, if you only use the recommended 50% of available charge between each charge cycle to protect the batteries.

From this you could run:

• a modern 12Vdc fridge (approx. 1.5Ah, or 36Ah over 24hrs),
• all LED lighting (say 20Ah per day),
• various small device chargers (20Ah)
• and a number of other items such as water pumps, TVs and stereos (25Ah/day)
• Totalling around 100Ah.
• For this you’d need 400W of solar capacity.

Of course, if you like to run a lot of AC devices off-grid such as hair dryers, microwaves, toasters and the like, then you’re going to need a DC/ AC inverter, which will take you to another level in power consumption terms.

But even then, with careful planning, solar could provide a large portion of the power you need before resorting to engine charging or a generator.

THE AVAILABLE SPACE

In practical terms, a modern 40ft monohull would have the space for around 1,200W of PV panels (cockpit arch, sprayhood top, deck), maybe 1,500W with the addition of a few portable panels for use at anchor.

The 1,200W of fixed position solar array could produce around 360Ah on a sunny summer’s day (zero shading) or more likely 250Ah on the average UK summer’s day.

So that’s enough for your 100Ah general DC consumption plus another 150Ah of AC consumption via the inverter.

Of course, to do this you’ll most likely need to increase your battery capacity to around 400-500Ah for maximum flexibility (you’ll need to store as much as possible during daylight hours), a typical figure for a 40-50ft offshore cruising yacht these days.

Get your solar charging right and you may never need to hook up to shore power

Typical daily inverter loads for a cruising yacht off grid might be:

• induction cooking plate (20min) 60Ah
• microwave (15min) 30Ah
• coffee maker (20mins) 25Ah
• hair dryer (5min) 15Ah
• laptop charger (2h) 10Ah
• or around 140Ah in total.

The trick is to monitor the batteries’ state of charge (SOC) at all times and vary your use of the inverter to suit.

For example, you might want to cook supper mid-afternoon, when solar is in abundance, and then reheat it in the evening when you want to eat it.

In some cases, when you’re cruising in warm climates such as the Med, you might end up with excess charge from your solar panels .

In this situation, many long-term cruisers devise a method of ‘dumping’ the extra energy by heating water for showers.

Do bear in mind if you’re planning to live aboard full time , then it’ll be a whole different story on cloudy days and during the winter, when inverter use might need to be knocked on the head entirely.

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POWER DISCREPANCIES

There’s often confusion as to how much power you can harvest from a solar installation.

A PV panel is nearly always advertised stating its theoretical peak output power (Pw).

But in reality, on a yacht where there are limited areas in which to mount them, they will more likely produce a maximum of 60% of their peak output if mounted horizontally, increasing to 80% if tilted towards the sun and regularly adjusted.

The latter is rarely achievable on a boat, however, as even at anchor it can swing through an arc of 180° in wind or tidal shifts .

Flexible panels can be mounted on sprayhoods or awnings to add power when it’s needed at anchor or in harbour

INSTALLATION

Having trawled through hundreds of ‘deals’ to get the best price on the most efficient panels you can afford you now need to know how to install them to best fulfill your energy generation needs.

The output, even from the highest quality photo-voltaic array, will only be as good as the installation itself.

So following our guidelines should ensure you extract every last drop of energy from your investment.

PANEL MOUNTING

Sailing boats are not the ideal structure on which to mount wide, flat PV panels.

So before you go ahead and purchase what looks like the biggest and best, take a few minutes to decide on exactly where you can mount them, as this will affect what size and type of panels you should buy.

In many cases the first choice would be on an arch, davits or gantry aft, especially if you already have, or plan to fit one.

Dinghy davits, particularly on multihulls, can support a huge solar capacity

These allow a solid metal framework to be constructed that will be strong enough to take the heavier, more productive rigid PV panels.

You can also build in some form of adjuster to the framework that will allow the panels to be orientated towards the sun for the best performance.

With luck (or careful planning) a gantry will also keep them aft of the boom, thereby eliminating loss of output caused by boom shading.

The next most popular position for mounting the panels is on a cockpit sprayhood or bimini, although this will often mean using the flexible or semi-flexible panels, which are generally less efficient than the rigid ones for the same area.

ELEVATED MOUNTING

Alternatively, there are kits available for mounting panels onto lifelines, which can allow their elevation to be manually adjusted to a certain degree.

Pole-mounted panels can be used for maximum adjustability

Finally, panels can be fitted directly onto the deck by either gluing them down using mastic or attaching them onto a rigid support frame.

Once again you will probably need to use semi-flexible panels – especially if the deck surface is curved.

Rigid, glass-coated panels will obviously not be suitable for deck mounting in an area that is frequently walked over.

Don’t be tempted to drill through the panels, even along the edges, as this will invalidate the warranty and possibly damage the panel.

With solid panels, the ability to adjust the angle can add significantly to output

It might seem obvious, but the key to an efficient system is to avoid shading wherever possible.

It’s no good fitting expensive, high-efficiency PVs right under the boom as they’ll perform little better than the cheaper types.

Saying that, in good quality panels each cell will be isolated from the next by a series of diodes (one-way electrical valves), so that if one cell is shaded at least it won’t drag down the other cells within the same panel.

Older panels often didn’t have these, so the slightest partial shading caused the output of the entire panel to cease.

OVERHEATING

Another important factor that is often ignored when installing the panels is that of overheating.

If a PV panel gets too hot, which is quite likely if mounted directly onto a flat surface without an air gap behind, its output will drop quite noticeably.

To allow for some air circulation behind the panels it’s best to apply mastic adhesive in numerous large dabs.

This is best achieved by placing wooden spacer strips between the dabs until the mastic has completely cured, after which the spacers can be removed.

You might need some form of trim around one or more of the outside edges, though, if they are positioned where sheets and other lines might get caught under them.

Raising the panels up will also help water to drain off and thereby helping to avoid possible delamination from sitting in water for too long.

CHARGE CONTROL

A PV module cannot supply an electrical device directly due to the changeability of the sunlight, which in turns varies the current it can produce.

Therefore, it has to be connected to a battery, which stores and smooths its output.

Whatever the size of your solar array you will need to fit a regulator, or charge controller as they are now more commonly known, to the system in order to control the output and to help extract as much power from the panels as possible.

There are two types of PV charge controller.

The older designs, called Pulse Width Modulation (PWM) types, were fairly basic voltage regulators and simply output volts at just above battery level.

The latest controllers use Multi Power Point Tracking (MPPT) technology and can accept much higher input voltages (up to 240Vdc).

MPPT controllers can be up to 30% more efficient as they use the peak output of the panels to charge the batteries, even compensating for partial shading.

BEWARE FAKE GEAR

If you buy online do be careful to ensure you’re getting what you pay for.

There are a huge number of fake MPPTs out there, which are simply the much cheaper PWM dressed up with fake labels.

It’s hard to tell which is which, but the old adage of ‘if it looks too good to be true, it usually is’ makes good sense.

MPPT controllers are usually bigger and heavier than PWMs, but if in doubt call or email the supplier to discuss the pros and cons of their kit before buying.

If they’re not happy to chat and advise you then I would steer clear of their gear.

Some good MPPTs are made in China, but unless they have a UK supplier, I wouldn’t bother with them as you’ll have no follow-up advice.

To calculate what size controller you need simply divide the panel’s peak power in Watts (Wp) by the battery voltage, which will give you the maximum current (Amps) they could theoretically supply.

For example 240W/12V = 20A. Although it’s unlikely you’ll ever get near the peak output from any PV panel, it’s best to go for the maximum possible.

Induction cooking is now a reality on board, even without shore power

PV panels come with a short length of cable, usually around 1m long.

Some are supplied with MC4 connectors already attached but most only provide bare wires.

The latter can be easily extended using proper waterproof connections but thought must be given as to the current rating and voltage drop (usually max 3%) for the size of cable you intend to use.

If in doubt, bigger is better!

Panels can sometimes be ordered with the wiring on the back so that the cable can go straight below deck through a hole under the panel.

You may need to fit extra battery capacity if you want to run an inverter from solar charging

SERIES OR PARALLEL?

A commonly asked question is ‘should I wire my PV panels in series or in parallel?’

The simple answer is, if there’s any danger of frequent shading to one or more of the panels then install them in parallel.

If wired in series the shading of a single panel will drag down the output from all of the others in the same series.

PARALLEL IS PREFERRED

Most commonly, multiple panels are wired together in parallel to a single charge controller, with diodes protecting each panel from discharging the others should one become partially shaded.

With the advent of MPPT controllers, however, there can sometimes be a benefit to wiring two or more identical panels into a series bank, thereby presenting a higher voltage to the controller.

It’s worth noting that, like batteries, wiring PV panels in series increases the voltage only – the current capacity of the array remains the same as for a single panel.

‘Where’s the benefit of wiring them in series then?’ you might ask.

Well, the higher the voltage fed into the MPPT, the more consistent it will be with its output, which could, in some cases, prove more efficient than a parallel installation with PWM controllers.

It’s also likely to be necessary if you have a 24V domestic system.

SERIES WIRING

Series wiring is usually only done when the cable runs are long, as it helps negate the voltage drop caused by the resistance of the cable.

While a decent controller will have no problem handling the output from four or even five panels wired in series, it is often inappropriate for sailing yachts as shading just one of the panels will reduce the output of the entire series array.

If you need to do so in order to reduce cable runs then it’s best to split the panels between each side of the boat – a series bank on each side.

If you do this, then you would ideally fit a separate controller to each series PV bank and then connect their outputs together in parallel to the battery bank.

Note, however, that panels wired in series must all be the same types with an equal number of cells per panel.

Furthermore, the charge controller needs to be sized for the total of all panel voltages added together and the current rating of one individual panel.

Differently rated panels can be connected together in parallel but only if each panel has its own controller.

The outputs of the individual controllers can then be joined together to go to the battery bank.

BATTERY BANK QUESTION

Another frequently asked question is ‘Can I connect another charging source to the battery bank while the solar array is charging?’

The answer is yes.

Any decent PV controller will be protected against feedback from other charging sources.

Think carefully about where shade from mast, boom and rigging will fall. Credit: Graham Snook Photography

CABLE SIZE AND CONNECTORS

A frequent cause of reduced output from PV arrays is wiring that is too small.

The resistance of a wire conductor increases in direct proportion to its cross-sectional area, so go as big as is practicable for the least cable loss.

Each panel should be supplied with the correctly sized cables for its own maximum output.

But if you’re combining panels, either in parallel or in series, you will clearly need to rate the single feed cable to suit the maximum current available at theoretical peak solar output and to minimise voltage drop.

Likewise, the cable from the controller to the batteries should be sized to suit the controller’s maximum output current and protected with a fuse.

For outside it’s important to use exterior grade cable, which is double- insulated and UV-proof.

WEATHERPROOF CONNECTORS

And wherever possible use compatible weatherproof connectors (usually MC4) to those found on the panels rather than cutting off the plugs and hard-wiring them.

Field- assembly MC4 plugs are available, so you don’t have to drill large holes in the decks or bulkheads when feeding the cables through.

When joining more than one panel together try to use the approved multiway connectors; not only do they keep the wiring neat and tidy, but they also offer a greater contact area than budget terminal blocks.

If you have to use screw-type connectors make sure to fit proper ferrules to the wire first to avoid any stray wires in the multistrand shorting across the terminals.

When feeding a cable from above to below deck, try to go through an upright bulkhead where possible to minimise ‘pooling’ of water around the access hole.

Also, use a proper watertight deck seal that matches the cable you’re using.

If drilling through a cored deck you need to drill a larger hole first, fill it with epoxy resin and then drill the required size hole through the epoxy to ensure no water gets into the deck core.

Ideally, the charge controller should be mounted no further than 2m from the battery bank.

If you need to go further, you’ll require larger cabling to reduce the voltage drop.

A generous solar array will keep you self- sufficient indefinitely. Credit: Graham Snook Photography

CONTROLLER LOAD TERMINALS

There is often confusion over the ‘load’ output of a charge controller (often depicted by a light bulb) and what can safely be connected to these terminals.

Rarely explained in the manual, the load terminals should be pretty much ignored in a marine installation as the output on these terminals is usually very limited (10A max).

Some attach an LED light to them to indicate the controller is operating, but all your usual electrical loads should remain connected to the batteries with the battery terminals on the controller connected directly to that battery bank via a fuse.

It is possible, though, to control a high-current switching relay in certain conditions.

Parallel installation is more resilient to shading, but a series installation will increase peak charging outputs. A combination of the two offers some of the benefit of both

CIRCUIT MONITORING

Unlike most cheap PWMs, the majority of good quality MPPT charge controllers come with an alphanumeric LCD screen to let you know what is going on.

This can either be a remote display or simply one on the front of the box.

It’s obviously a lot better to have a proper numerical display than to rely on a few flashing LEDs to tell you when something’s not right.

So if your chosen controller doesn’t have one be sure to fit a battery monitor (the shunt type) into your solar circuit between the controller and the batteries.

It doesn’t have to be a very ‘smart’ monitor, just one that can display the voltage and current being supplied by the panels.

For smartphone addicts there are several wifi apps that will do the job remotely on your phone or tablet.

DEVICE PROTECTION

All good quality PV panels feature built-in diode protection between each cell to prevent a shaded cell from dragging down the productive ones.

In addition, there will be internal blocking diodes on the final output to protect the panel from polarity reversal and to ensure that the batteries can’t discharge back into the panel during the night.

The latter can be added externally, the former can’t, so check before you buy.

A fuse, rated just above the maximum current available, should be fitted between each panel and the charge controller.

Another fuse should then be installed between the charge controller’s output and the batteries.

In the case of multiple arrays, this second fuse will be rated higher than the individual panel fuses and should match the maximum current rating of the cable.

With this protection installed other charging devices can be connected in parallel at the battery, meaning the solar can be left connected even when you are hooked up to shore power and the battery charger is operating.

In some circumstances, however, this arrangement can affect the sensing of the battery by the charger, causing it to fall back into float mode.

If this becomes apparent it can be overcome by installing a manual/auto switch to disconnect the solar array when on shore power.

Check the flex of the solar panel is sufficient for your deck

EXCESS POWER DUMPING

A solar charge controller works by disconnecting the supply from the PV panels when the batteries are fully charged.

But for some full-time liveaboards in sunny climates that can be considered a waste, when the excess power could be put to good use – heating water, say.

This is commonly done using an inverter to supply AC power to the heating element.

Alternatively, you can now buy a 12Vdc element for your calorifier (hot water tank) and supply this directly from your battery bank.

Both of these methods would require a voltage sensitive relay (VSR) to disconnect the element should the battery voltage drop below a pre-set level.

Don’t expect boiling hot water, as there will probably only be enough spare power to take the chill off it before your battery bank reaches its lower threshold voltage.

A 600W/12V element will draw some 50A, from the batteries, whereas a 1kW AC element run through an inverter will need close to 100A.

A small, semi-flexible panel will be sufficient for keeping batteries trickle charged, but not for heavy use

RIGID, FLEXIBLE, OR SEMI FLEXIBLE?

Despite massive recent improvements in semi-flexible panels in recent years, the solid glass panels still offer a higher power density.

That said, they are heavier, more awkward to mount and can’t be walked on, so unless you have a dedicated gantry aft, you’re better off choosing the more rugged semi-flexibles.

Modules incorporating monocrystalline cells also have a better output than those with polycrystalline cells (that’s cells made from a single slice of silicon as opposed to layers of smaller pieces).

Output voltage also depends on the number of cells on the panel.

In the past this has commonly been 32, but now some 36 and even 40 cell panels are available.

That said, they’re larger, of course, so an array of interconnected smaller panels might be a better solution.

Module efficiency is now more often around the 20% mark, as opposed to 12-15% for older models and semi- flexible (up to 20° bend) are usually better than flexible (up to 180° bend).

A rigid panel is more efficient, but less robust

There are a huge number of panels on the market, but many use the same cells.

Sunpower Maxeon cells are exceptionally good, as are the Panasonic HIT range and LG, but they are pricey.

If the maker is offering a 25-year guarantee instead of a 3-5 year one, you can be pretty confident they’re good.

When it comes to charge controllers it’s definitely worth paying a little more for a decent MPPT.

A cheap PWM might be okay just to keep a small starter battery charged with a 30W panel, but the MPPT will give you much more when it comes to heavy service.

Victron are probably top of the range, while cheaper brands like MakeSkyBlue and EPever are also good value – but treat imports of unclear origin with care.

ABOUT THE AUTHOR

Duncan Kent has been evaluating and reviewing yachts and marine equipment for the past 30 years

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The 6 Best Marine Solar Panels of 2024

This post may contain affiliate links. Please read our disclosure policy .

The best marine solar panels can keep boat batteries topped off so that your bilge pumps, navigation lights, GPS systems, depth finders, and other electronics continue to run smoothly and efficiently. By combining marine solar panels with a charge controller that can regulate the sun’s energy into a deep cycle or lithium battery bank, you can create your own electrical grid for those long days spent at sea.

Or, you can use solar panels to supplement shore power when you’re docked in a marina to help cut back on costs. 

There are two main types of solar panels that can be utilized on boats: Flexible and fixed, which come in a variety of different sizes and power wattages. Depending on factors like usage and the size and type of your boat, the best marine solar panel will vary.

To come up with our list of the best marine solar panels, we looked at dozens of options from well-established solar companies. We considered their efficiency, wattage, size, customer reviews, and ratings, pricing, and even compared top picks with our own first-hand experience. Ahead, check out our recommendations. 

Our Top Picks:  

• Our Top Pick:  Renogy 100 Watt 12 Volt Monocrystalline Solar Panel – $99.99 at Amazon
• Best Flexible Marine Solar Panel : N ewpowa Flexible Solar Panel 100 Watt 12 Volt – $99.99 at Amazon
• Best Budget Marine Solar Panel : HQST 100 Watt 12 Volt 9BB Monocrystalline Solar Panel – $69.99 at Amazon
• Best Rigid Marine Solar Pane l: SUNER POWER 50 W 12 V Solar Battery Charger – $119.95 at Amazon
• Best Portable Solar Panel: DOKIO 160 Watt 18 Volt Portable Solar Panel Kit Folding Solar Charger – $159.77 at Amazon

Reviews of The Best Marine Solar Panels

1. our top pick: renogy 100 w 12 v monocrystalline solar panel.

Our top pick for the best marine solar panels comes from Renogy, perhaps one of the most well-known brands in DIY solar panel installation. Renogy’s 100-watt monocrystalline solar module is proof that a simple design can sometimes be the best. Although it doesn’t include built-in controllers, it excels at all the basics.

The panel has an impressive 22% efficiency (the typical solar panel range is between 18% and 23%) and a guaranteed positive tolerance, which means users can expect a minimum output of 100 watts. It’s also made from high-quality materials like corrosion-resistant aluminum and boasts notable industry certifications from TUV Rheinland and Intertek . That said, the waterproof rating of the junction box is not well suited for total immersion (but is protected against rain or waves), so just make sure you securely mount these panels. 

• Power Rating: 100 W
• Claimed Efficiency : 22%
• Weight: 14.1 lb
• Dimensions: 41.8″L x 20.9″W x 1.38″H
• Waterproof Ratings: IP65 (junction box), IP67 (connectors) 
• Mounting Options: Clamp using mounting holes
• Excellent build quality
• Guaranteed positive tolerance (0-4%)
• Great ratings 
• Moderate price
• Basic design
• Mounting can be difficult for inexperienced users

What Others Are Saying:

Renogy’s 100 W panel has a 4.7-star rating from more than 6,370 Amazon ratings.  Sail Magazine , EcoWatch , and Futurism all chose the Renogy 100 W panel as their best overall marine solar panel, too.

Buy the Renogy 100W 12V Monocrystalline Solar Panel:

2. Best Flexible Marine Solar Panels: Newpowa Flexible Solar Panel 100 W 12 V

This pick from Newpowa is easily one of the best flexible solar panels for boats. Weighing in at a little over four pounds — about a third of a rigid solar panel of the same size – the module uses high-quality SunPower solar cells and sturdy ETFE binding for durability. Its thin design allows it to easily be mounted on biminis or directly on curved deck surfaces, and the MWT (metal wrap through) technology eliminates bus bars on the front side, improving power output .

It’s worth noting that flexible marine panels are often slightly less efficient than rigid panels, but this 100-watt panel from Newpowa maintains a 20% efficiency – one of the highest available for flexible panels. The waterproof rating of the junction box is an impressive IP68, meaning it can be immersed in water for long periods. 

• Claimed Efficiency : 20%
• Weight: 4.19 lb
• Dimensions: 41.34” L x 21.26” W x .12” H
• Waterproof Ratings: IP68 (junction box), connectors not specified
• Mounting Options: Tie-down using grommets; caulk/paste to hull
• State-of-the-art MWT technology
• Lightweight and compact design
• Reasonably-priced
• Durable construction
• No adhesive back surface for pasting

One of the best marine solar panels for flexibility, the Newpowa 100 W panel has a 4.6-star rating from more than 1,200 Amazon shoppers.  

Buy the Newpowa Flexible Solar Panel 100 W 12 Volt:

3. Best Budget Marine Solar Panel: HQST 100 W 12 V 9BB Monocrystalline Solar Panel

This 100-watt solar panel from HQST has a ton of great features for a decently affordable price. It comes with a 9-busbar construction that helps to achieve an efficiency rate of up to 23% – the highest we’ve found. For some, the square-shaped design may be more helpful for installation, especially in compact spaces. 

The panel is also made with top-quality materials, like high-purity silicon cells and multi-layered sheet laminations. It’s rated to IP65 to protect against low-pressure water jets from any direction (like hard rain), but cannot be fully immersed in water.  

• Claimed Efficiency : 23%
• Weight: 14.82 lb
• Dimensions: 32.5″L x 26.4″W x 1.18″H
• Waterproof Rating : IP65 (junction box and connectors)
• Inexpensive
• High efficiency
• Compact, wide-body design
• Wide-body design may be difficult to mount in elongated spaces 
• Some reviews mention it didn’t achieve the advertised maximum efficiency

The HQST 100 W monocrystalline solar panel is one of the best marine solar panels: It was featured as a runner-up in Futurism’s list of best marine solar panels. It is also among Electric Rate’s picks for best marine panels. 

Buy the HQST 100 W 12 V 9BB Monocrystalline Solar Panel:

4. Best Rigid Marine Solar Panels: SUNER POWER 50 W 12 V Solar Battery Charger 

Very few rigid solar panels on the market come with an integrated MPPT charge controller and adjustable mounting bracket, especially at the price of the Suner Power 50 W panel. While the solar panel itself is a basic, monocrystalline module, the built-in controller eliminates the need for buying, mounting, and connecting another electronic device. 

Another major standout is the adjustable bracket that can allow for more direct sunshine throughout the day, improving power production. However, the cables and controller are not waterproof (only splash/light rain resistant), so you may want to add extra protection if it’s angled in a manner that can expose the controller to heavy rainfall. 

• Power Rating: 50 W
• Claimed E fficiency : 21%
• Weight: 7.7 lb
• Waterproof Rating: IP54 (Controller and cables)
• Dimensions: 23.4″L x 20.5″W x 1″H
• Mounting options: Clamp using mounting holes
• Integrated MPPT charge controller saves hassle
• Integrated adjustable bracket improves output
• Adjustable brackets can be bulky on certain areas of the boat
• 50 W rating may be insufficient for some 

The Suner Power 50 W Solar Panel has a 4.4-star rating from more than 1,300 ratings on Amazon .

Buy the SUNER POWER 12 V 50 W Solar Battery Charger:

5. Best Portable Marine Solar Panels: DOKIO 160 W 18 V Portable Solar Panel Kit Folding Solar Charger

Weighing just 9 pounds, the Dokio 160 W foldable kit was designed for portability. It can be easily carried like a suitcase, but setting it up is just as easy and usually takes less than a minute. Its 160 W rating offers enough power to run several appliances on the boat, plus, it comes with a decent-quality charge controller and cabling accessories.

This portable panel is a great choice for anyone who wants to use it on s hort fishing trips on the lake, day sailing, or even camping, plus, it’s also good to have around as a backup during power outages.  That said, if you plan on using the boat as a liveaboard or for frequent, multi-day boating trips, you’ll probably want to purchase fixed solar panels instead.

• Power rating: 160 W
• Claimed Efficiency : 22-23%
• Weight: 9 lb
• Dimensions: ‎ 20.9″L x 19.3″W x 1.1″H
• Waterproof Rating: IP65 (panel) 
• Mounting options: Lay flat or rest on brackets (sold separately)
• Highly portable
• Lightweight
• May be difficult to mount on some surfaces
• Need to purchase brackets separately

Dokio’s portable solar kits find a spot on several lists of best portable solar panels, including  USA Today , Treehugger , and BBC Science Focus . 

Buy the DOKIO 160W 18V Portable Solar Panel Kit Folding Solar Charger:

Other Marine Solar Panels to Consider

Atem power monocrystalline flexible solar panel 100 w 12 v.

Atem Power’s flexible, all-black solar panel is one of the sleekest-looking marine solar panels on the market. If you have a modern boat or yacht, the Atem Power 100 W Panel will certainly preserve its aesthetic. It also has a low weight of 7 lb and a noteworthy efficiency of 22%. The only downside is that some customers mention a relatively faster rate of degradation, so you probably won’t get full power from it after a few years. The ATEM POWER Monocrystalline Flexible Solar Panel 100 W 12 V is available at Amazon for $119.99.

Renogy Bifacial 115 W 12 V Solar Panel

Renogy’s bifacial solar panel has an innovative design that generates power from both sides. While bifacial modules aren’t super common for marine applications, boats with white hulls reflect enough sunlight to allow the Renogy Bifacial 115 W to generate up to 30% more energy than a traditional panel of the same size. Unfortunately, the Bifacial 115 W Solar Panel isn’t popular among boaters, leaving us with a very small number of first-hand experiences. Since there aren’t a ton of reviews, we didn’t feel comfortable including it in our list of the best. The Renogy Bifacial 115 W 12 V Solar Panel is available at  Amazon for $129.99 . 

XINPUGUANG 400 W Flexible Solar Panels Kit

If you’re looking for a full-fledged solar panel kit that’s capable of powering large boats, the Xinpuguang 400 W kit is a great option. It includes four high-efficiency flexible solar panels, a charge controller, wiring, and connectors. However, if you have some working knowledge of solar panel component selection, you can create your own kit for cheaper — especially because this is one of the priciest options we found at over $400. The Xinpuguang 400 W Flexible Solar Panels Kit is available at  Amazon for $469.90 .  

Topsolar Solar Panel Kit 20 W 12 V

Not everyone is looking to power fridges and computers on their boats — some folks just want to keep their phone battery charged or power a small fan on a hot fishing trip. The Topsolar 20 W kit is a good choice in such cases since it comes with a compact, high-efficiency solar panel, a charge controller, and some cabling. However, because it doesn’t have separate positive and negative terminals with MC4 connectors, wiring is a bit tough. The Topsolar 20 W Solar Panel Kit is available on Amazon for $29.99 . 

Why You Can Trust Us

Hi! My name is Aniket Bhor, and I’ve been passionate about solar energy for the past decade or so. Over the years, I’ve worked at solar power companies on three different continents and written for sites from a dozen countries worldwide. I love using my experience in the solar panel manufacturing, design, and installation sectors to recommend the best products for Go Downsize readers. 

Go Downsize, started by Morten and Maria , is a highly reputable source of information related to downsizing and space optimization. With over 20 million YouTube video views, Morten and Maria’s blog is one of the most trusted platforms on the web for downsizing content, whether it’s related to RVs, boats, or trailer homes.

To come up with our list of the best marine solar panels, I worked with Morten and Maria to consider different factors like efficiency output, power, features, and pricing. We utilized our first-hand experience and discussed our favorite features, ultimately narrowing our roundup down to six of the best options on the market.

What to Know About Marine Solar Panels

Things to Consider When Choosing a Marine Solar Panel

Finding the best marine solar panel will vary. To choose a good option for your needs, you should think about a few different details. 

Power rating

The most important specification to consider when looking at solar panels is their power rating. The rating of a solar panel will tell you how much energy it can generate throughout the day. Naturally, boats with a greater number of appliances will need one or more solar panels with a higher rating. 

Typically, most boats need anywhere between 150 and 300 watts to power a few basic devices such as phones and laptops. Buyers can also use a solar calculator to figure out the correct solar panel size for their needs. This will also vary on the type of batteries you use (deep cycle vs. lithium), and also whether you recharge your batteries with your boat’s high output alternator. 

It is also important to note that the required power rating will change with the location of the application . For instance, solar panels on a boat in Florida or California will generate more power than those on a boat in New York.  

While the power rating of a solar panel signifies how much power it can generate, its efficiency will tell you how much power it can generate per unit space. High-efficiency panels can generate more energy in a smaller space.

Higher efficiency is important particularly for marine applications since there is limited mounting space on a boat. High-efficiency solar panels are typically also built using Grade A or A+ solar cells, which have a low rate of degradation and more reliable performance.

Mounting Options

Most boats or yachts aren’t designed with solar panels in mind. As such, mounting traditional solar panels on the hull can sometimes be challenging. For boats with sufficient mounting space, traditional solar panel designs are perfect, since they’re also cheaper. You can simply clamp the panels on any flat surface with nuts and bolts.

But for boats with uneven surfaces, flexible solar panels can be a great option. Many flexible panels come with adhesive back surfaces — all you need to do is peel off the sticker and paste the solar panel on the hull. If you own two boats that you use alternatingly, you may even want to consider portable solar panels that can be laid down on the boat and packed and moved again within a few minutes.

Build Quality

The best solar panels can last 25 or more years. But on the opposite end of the spectrum, there are solar panels that stop working within two years. Solar panels are complex, sophisticated electronic devices, which means building a good-quality solar panel isn’t an easy feat. 

This makes it important to use products from reputable brands. Top-quality solar panels have a low rate of degradation. For example, a good solar panel will still generate 80% of its rated output after 20 years of operation. Many companies also offer a power production guarantee like the one mentioned above. It is also important to check the warranties on marine solar panels. A panel with a 10-year warranty is obviously a better choice than one with a 2-year warranty.

Waterproof Ratings

Solar panels are designed to be left outside in the rain, but when it comes to the cables or junction boxes, waterproof ratings vary dramatically. When shopping for a marine solar panel, be sure to check the IP ratings on the connectors, because you may want to add additional protection for heavy rain or waves. 

Are Solar Panels Worth it on a Boat?

Yes, solar panels are certainly worth it on a boat. Solar panels are quiet and clean, and there are no hassles of running out of fuel or frequent maintenance. With the right equipment, boat or yacht solar panels can power pretty much anything on a boat, and last for significantly long periods. Moreover, modern solar panels are also much cheaper than their older versions, making them a must-have on any boat. 

If you’re keeping a boat in a marina as a liveaboard, electric power can be notoriously expensive, and solar panels can help reduce the overall cost. For liveaboards on a mooring or anchorage, they’re necessary for keeping things charged (constantly running an engine or generator to charge batteries isn’t really a viable long-term option). Or, when you’re underway on day trips or longer adventures, solar panels can provide backup power in remote areas, so they are an excellent investment for any vessel. 

How to Charge a Marine Battery with a Solar Panel

Charging a marine battery with a solar panel is pretty straightforward. Solar panels generate direct current, which can be sent straight to the battery for storage, so you only need a charge controller to optimize the charging and improve safety. Just connect the solar panel’s terminals to the “PV” ports on the controller and connect the “battery” ports on the controller to a battery using another set of cables. From there, the charging begins.

The size of the battery will dictate the required size of your solar panel. If you have a 50 Ah, 12 V marine battery, this means you have a 600 Wh storage capacity (50 x 12 = 600). A typical, 160 W panel will generate around 600 Wh on a decently sunny day. You can also use a solar battery calculator to figure out the exact combination of solar panels and marine battery you’ll need. 

How to Install Solar Panels on a Boat

There are several ways to install solar panels on a boat. You can do a hard mount by drilling holes and securing the panel with nut bolts, or use a bimini-mounting system. Some solar panels can also be tied down to the boat with ropes or cables.

When installing wiring, you’ll want to invest in through-deck wire seals if you’re drilling holes through into the deck. These help to protect the core of the boat from water intrusion. If possible, it’s best to utilize existing tubing in the pulpits and stanchions to minimize the amount of exposed wiring. 

Thin, flexible solar panels can be pasted to the boat’s surface with an adhesive. However, if not pasted/caulked properly, these panels can catch wind and get damaged or come off entirely. Some good brands of durable adhesives /sealants are Boat Life, 3M, and Sikaflex. 

Solar panels can also be mounted on a pole using the correct mounting brackets. In places where the sunshine isn’t strong enough, it even makes sense to use adjustable brackets which allow you to change the orientation of the panel, helping it absorb more sunlight and generate more energy. These could also be mounted on the sides of the stern pulpit, and fold down or collapse when not in use. 

You can also utilize flexible panels on biminis, or create a solar arch structure that, with fixed or flexible panels, can be combined with wind turbines, antennas, and davits — but it takes some thinking outside of the box and creative designs. Before installing the panels, it might be helpful to map out a few ideas for ways to maximize space options and capture the most sunlight possible. 

How Many Solar Panels Are Needed to Power a Boat?

The number of solar panels needed to power a boat depends on the size of the boat, the number and wattage of the appliances on board, and the power rating of the solar panels. Typically, 200 to 300 watts of panels are sufficient enough to power a small to medium boat if there aren’t any power-hungry appliances on it. Considering the most popular panel size of 100 W, you would need two to three solar panels to power electrical equipment on a boat.

Are There Solar Powered Boats?

It is possible to build a boat that operates entirely on solar power, and several prototypes have already been built and demonstrated. However, to propel an entire boat will need a large number of solar panels. Usually, there isn’t enough space for this on traditional boats or yachts. 

Most solar-powered boats today are engineered to have extremely light structures and aerodynamic designs to minimize the number of solar panels needed. On the other hand, the energy density of gas or diesel is much higher, meaning a small fuel tank and motor can power the entire boat more easily, even if the boat is relatively heavy. Thankfully, marine and sailing yacht solar panels are becoming more efficient, and soon solar-powered boats may become mainstream.

Related Posts

• How Do Boats Have Electricity
• Popular Boats for Living
• How Much Solar Power do Campervans Need?

Prices were accurate at the time of publication. 

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Choosing the Best Marine Solar Panels for Your Boat

There’s nothing like kicking back and relaxing in a boat all to yourself. But while sailing the waves and soaking in the sun is an awesome getaway, you’ll still need to think about how to generate electricity while on board, especially for running your boat battery.

Get free power through solar energy with the best marine solar panels. Not only are they easy to set up and use, but you also save money by relying on renewable energy instead of paying expensive electricity bills like usual.

But how do you look for the most suitable solar panels for boats if there are dozens of solar panel types out there? Well, you’ve come to the right marine solar panels review. There are three key things you need to keep your eyes out for when choosing marine solar panel kits for your beloved boat.

• Waterproof: Since you’ll be traveling across bodies of water, you have to anticipate that your solar panels could get wet. Make sure your solar panels are resilient against water damage through waterproof designs.
• Flexible: Boats have curved surfaces, unlike roofs that are flat and can do with rigid panels. Marine solar panels can be straight and conventional, but it would be a big help if they were flexible so that you can mount them on tricky surfaces on your boat. Flexible solar panels hug irregular surfaces, ensuring they don’t topple over as your boat moves.
• Thin: Boats are small spaces as it is. You don’t need bulky, rigid panels occupying more space than necessary. Go for ones that are about an inch or so thick. Thinner solar panels are sleek and don’t take up too much space, so they’re a must for marine solar solutions.

There are many other factors you need to consider when looking through boat solar panels for sale. Check out the rest of the important factors in our buying guide below.

Need more help picking out a good boat solar panel kit? Look through this rundown of solar panels for boats reviews to see some of the most popular options.

Best Overall

Renogy Monocrystalline Solar Panel

Premium Choice

Topsolar Solar Panel

Editor’s Pick

ECO-WORTHY Solar Panel

Table of Contents

1. Renogy 100W 12V Monocrystalline Solar Panel

2. topsolar 20-watt monocrystalline solar panel, 3. eco-worthy 25w off-grid solar panel, 4. renogy extremely flexible solar panel, 5. suner power 30w polycrystalline solar panel, 6. newpowa monocrystalline 100-watt solar panel, 7. rich solar polycrystalline solar panel, 8. topsolar 100-watt 12-volt solar panel kit, 9. newpowa monocrystalline 30-watt solar panel, what to look for when looking through marine solar panel options, how many solar panels do i need to run a boat, how many amps does a marine refrigerator use, how do you install solar panels on a boat, top-rated marine solar panel reviews.

• Material: Monocrystalline
• Wattage: 100W
• Voltage: 12V

This solar panel kit by Renogy is awesome because it’s an all-in-one solar system. It includes all the necessary cables and accessories to get the show on the road.

The convenient kit includes a 100-watt solar panel, the Wanderer 30A PWM controller, and connectors and adapters. It even has Z brackets for mounting your solar panel. I like that I didn’t have to purchase all these separately.

I like that the Wanderer charge controller is negative ground, which means it prevents any overcharging and short-circuiting issues with our batteries.

Now, for the solar panel itself, I appreciated how the frame was made of sturdy, high-quality, corrosion-resistant aluminum, making the panel extra durable.

Its monocrystalline solar cells can convert 21% of the solar power to free energy you can use on your boat. That’s pretty high compared to other solar panels.

Plus, the production power of this solar panel kit is quiet, so it won’t bother you when you need silence.

• Includes the necessary connectors, controller, and mounting brackets
• The negative ground controller stops overcharging and short circuits
• The solar panel has a durable, corrosion-resistant aluminum frame
• Monocrystalline cells convert 21% of solar power into free energy for you
• Power production is quiet, so it will never disturb users
• The charge controller has no LCD screen
• Wattage: 20W

This Topsolar solar panel kit is another one that offers a lot of accessories. It comes with a charge controller, some alligator clips to hold your cables and connectors properly, and even an O-ring terminal.

The solar panel itself is made of thick, high-class tempered glass to protect the cells inside. It’s framed with aluminum for extra sturdiness as well. I love that it’s made of such premium materials, so I never have to worry about it being too flimsy or break apart easily.

All in all, the solar panel weighs a mere 4.8 lbs, making it easy to carry around. It’s lightweight enough for effortless lifting and transporting when I’m about to install it or move it to another area.

This marine solar panel is resistant to harsh weather, thanks to its maximum static load of 2,400 Pa. Because of this, you can use it worry-free, even in inclement climates.

There are pre-drilled holes at the back of the panel to make it easier to set up with screws and grommets.

• Comes with a charge controller, alligator clips, and O-ring terminal
• The panel is made of tempered glass and an aluminum framing
• Weighs only 4.8 lbs, so it’s easy to lift and carry around
• Resistant to harsh weather like wind or snow
• Has pre-drilled holes at the back to make set-up easier
• Doesn’t include mounting brackets
• Material: Polycrystalline
• Wattage: 25W

A long lifespan is one of the top factors I consider when looking for a marine solar panel. This one by ECO-WORTHY ticks off that box because it is built to last.

It’s made with highly efficient cells to give me adequate power output. The framing is designed with aluminum to make it sturdy, increasing its longevity.

This off-grid solar panel kit comes with a convenient charge controller. Its interface may not have a modern display screen, but it does have light indicators that update in real-time so you can tell how far your charge is coming along. It also has a USB port to let you charge your phones and other small devices.

The solar panel set comes with SAE connector cables to help users set up. They’re quite long and stretch to 9.84 feet, giving us maximum flexibility for moving our panel and charge controller around.

ECO-WORTHY offers a one-year warranty for this kit. You’ll also have access to the brand’s 24/7 hotline in case you have questions or concerns with your solar panel.

• Made with high-efficiency solar cells and aluminum for longevity
• Charge controller has power indicators that update in real-time
• There’s a USB port on the charge controller for small devices
• The SAE connector cables are quite long at 9.84 feet
• A one-year warranty with 24/7 technical support from ECO-WORTHY
• One 25W solar panel might not be enough to power multiple appliances

Setting up solar panels on curved surfaces is tough, but with these Renogy flexible solar panels for boats, it’s never a challenge.

These flexible solar panels bend to a 248-degree arc, which is a lot more flexible than other bendable panels. This is excellent for boat and yacht decks that are curved.

The panels are made of monocrystalline cells that emit 100 watts, ensuring a strong and reliable power supply for our consumption.

Transporting and setting up these flexible solar panels is a walk in the park, thanks to its lightweight and super thin design. They’re never bulky and retain the smooth silhouette of your boat.

They’re thin and light because they’re designed with advanced polymer, which is 70% lighter than other materials traditionally used to build solar panels.

These flexible panels are made to withstand bad weather. They resist impact and don’t get damaged in heavy loads of rain. You’ll find that they even tolerate up to 5,400Pa of snow.

• Bends to a 248-degree arc to fit irregular and curved surfaces and decks
• Monocrystalline panels emit a consistent 100 watts
• Super lightweight and ultra-thin, making it a breeze to transport
• Made with advanced polymer that is 70% lighter than traditional materials
• Resists impact and damage from heavy loads of rain and snow
• The cables in the solar panel kit aren’t the same length

These solar panels by SUNER POWER are built with high-efficiency polycrystalline cells, giving me great performance even with the small energy output. They emit up to 30 watts of power to use as free energy on the boat.

This kit charges our batteries safely. It goes through a strict three-step intelligent algorithm to make sure our battery doesn’t go through overheating and short-circuiting, so I know I’m extra safe.

You’ll also find bright LED lights on the charge controller that indicate how the charge is coming for easy monitoring. It’s a convenient way to make sure our charging is right on track even when we’re doing other errands on the boat.

Tough weather conditions are nothing when it comes to this marine solar panel. It’s built with IP65 waterproof technology, so I don’t have to worry about the climate damaging my solar panel kit. It can even resist erosion, rusting, and damage from the sun’s UV rays.

• Polycrystalline cells emit 30 watts of power to use as free energy
• Charges our battery safely with an intelligent three-step algorithm
• Has bright LED light indicators so you can see how your charging is going
• Withstands tough weather because of IP65 waterproof technology
• Resists erosion, rusting, and UV damage in finicky weather
• The wires could be longer

This Newpowa monocrystalline panel is smaller in size compared to most other panels. It comes up to about 45 x 20 inches, making it more manageable than bigger ones.

It’s made of monocrystalline cells that are highly efficient in turning power from the sun into free energy for our consumption and charging.

The panel’s aluminum framing prevents any corrosion, which extends the lifespan of the solar panel kit. That means I won’t have to constantly replace it.

The marine solar panel and some of its accessories are made to be waterproof. That way, they’ll survive even the most horrible weather conditions as you sail.

Venturing to areas and cities without much bright sunlight is no problem for this marine solar panel kit. The junction box is equipped with bypass diodes that ensure users don’t get any power outages even in cloudy, shaded areas.

• Smaller in size and more manageable than other solar panels
• The monocrystalline panels are efficient in converting power into energy
• Aluminum framing prevents corrosion, extending the solar panel’s life
• These monocrystalline solar panels can survive horrible weather
• Junction box has diodes to let your power work even in low-light areas
• You don’t get the rated 100-watt output every single day

This RICH SOLAR panel is one of my favorites for travelling. I love it because it allows for more sunlight absorption. The panels’ anti-reflective, high-transmission film also helps make energy conversion more efficient.

Because of these factors, this panel works extremely well even in areas that are low in sunlight . So when I know I’m going to be sailing to cloudy shores, I make sure to bring this panel along.

This set uses quick-connect cables that don’t take more than a few seconds to fix up. It makes installation fast and easy even for beginners.

There are also about 14 holes on the panel so that you can simply screw it onto your mount. That means you can set it up without the complication of drilling the holes yourself. The design is also compatible with a variety of mounts, further adding to user’s convenience.

• Its anti-reflective panels are high-transmission for even more efficiency
• High conversion efficiency even in areas without bright sunlight
• Uses quick-connect cables, so setting up is fast and easy even for beginners
• There are 14 pre-drilled holes on the panel for quick installation
• Works with many types of mounts
• Doesn’t include mounting brackets, so you have to purchase some

This solar panel by Topsolar emits 100 watts of power to charge any 12-volt battery while you’re on the go. It’s perfect for cars, RVs, and a huge range of off-grid uses, but it works excellently for boats too.

The panel is made with monocrystalline cells, protected by a coating of high-quality tempered glass. This protective layer also prevents wear-and-tear in the long term. Meanwhile, anodized aluminum frames the panel, protecting the edges from corrosion.

You get a V-shaped bracket along with your panel in this kit. This bracket allows users to tilt the panel in whatever direction they desire. It’s very helpful when we’re trying to position the panel to face the sunlight directly.

The charge controller this solar panel comes with is made with IP67-rated waterproof technology. This means it prevents any water damage from ruining our solar system.

• Charges any standard 12-volt battery while you’re on the go
• A wide range of uses
• The mono cells are protected with wear-resistant tempered glass
• The framing is made of anodized aluminum to protect the panel’s edges
• Comes with a V-shaped bracket to tilt the panel in the direction of the sun
• The charge controller is made with IP67 technology to avoid water damage
• The panel is quite heavy at almost 16 lbs, making it heavy to carry

This Newpowa panel emits 30 watts of power. That may sound small to some people, but it’s perfect for charging small devices and running just a few appliances on a short boat ride.

It’s made with high-efficiency monocrystalline cells. These cells allow for a more compact panel design that is smaller and more manageable than the brand’s polycrystalline panels.

Multiple layers of the panel protect its cells. This includes an ethylene-vinyl-acetate encapsulation, iron tempered glass, and even a TPT back sheet that can help with heat dissipation.

There are wires already pre-attached to the panel, one at 3 ft and another at 1 ft. Both of these have Anderson connectors as well, so users don’t have to fuss about setting them up themselves.

The panel also has holes pre-drilled in them, so it’s ready to be screwed into your mount or bracket of choice.

• Provides 30 watts of power, perfect for small devices and short trips
• Made with high-efficiency mono cells that allow for a compact design
• Cells are protected by multiple layers, like tempered glass and TPT backing
• The wires and connectors are pre-attached, which is great for beginners
• Comes with mounting holes already drilled on the back of the panel
• The solar panel isn’t weatherproof, so you can only use it on sunny days

HQST 100W 12V Solar Panel (Outdated)

This 100-watt solar panel by HQST is designed for efficiency and durability. The panel itself is anti-reflective, thanks to thick and durable tempered glass. It’s also lined with aluminum in its framing, which resists corrosion and damage to the panel’s edges.

Polycrystalline solar panels like this one are made with high-efficiency cells that convert more power into energy than the usual panel. They also contain diodes to bypass any power outages or drops when your boat travels into a shaded area.

This kit’s junction box is rated IP65, which means it’s waterproof. That way, it can resist damage from water jets and uncontrollable weather.

Installation is a breeze with the pre-drilled holes at the back of this panel. It’s perfect for newbies that don’t want to call in a professional to set it up.

• The anti-reflective panel is made with sturdy tempered glass
• An aluminum frame
• Polycrystalline panels efficiently convert the sun’s energy into power
• Contains diodes to bypass power outages when you go into low-light areas
• The junction box is rated IP65 to resist damage from undesirable weather
• Comes with holes drilled at the back of the solar panel for easy mounting
• The wires on the panel are quite short

WindyNation 100W Off-Grid Solar Panel (Outdated)

I love that this solar panel by WindyNation gives off a consistent 100 watts of power, provided that the panels are positioned directly under the sun. That makes it an ultra-reliable panel that isn’t flip-floppy when powering our devices.

The solar system comes with many accessories you’ll need to set up and use your panel. There’s a quality charge controller, some mounting brackets, and all the necessary cables needed.

My favorite part about this system is the charge controller. It has a high-quality LCD screen that displays all the information I need to see about my battery as it charges. It even has a sensor to help me monitor the battery’s temperature.

I can also choose and adjust what information settings are shown on the screen, depending on my preference. Buyers can get whatever information they’d like to know—amperage, amp-hours, temperatures, voltage, and more!

• Consistently provides 100 watts of power when positioned under the sun
• Comes with a charge controller, mounting brackets, and cables
• The charge controller has an LCD screen
• Sensor for battery temperature
• You can choose and adjust what settings to see on your LCD screen
• You must purchase fuses and fuse holders to complete this solar system

SUNER POWER 12-Volt Waterproof Solar Panel (Outdated)

This solar panel by SUNER POWER doubles as a battery charger. It’s powered by highly efficient polycrystalline cells on a sturdy solar panel. These solar cells generate battery power in any condition, even when the sun isn’t so bright.

The charging system follows a stringent and smart three-step algorithm, keeping your battery safe as it charges. It does so with a unique “Maximum Power Point Tracking” (MPPT) chip, which prevents battery issues like overcharging and short-circuiting. MPPT also allows the charge controller to generate up to 30% more power than others do.

The controller has a LED light where you can see all the pertinent information on your battery, like whether it’s charging and if the battery’s full.

This entire solar system is made with IP65 waterproof technology. It won’t be susceptible to water damage, so users don’t have to worry about backflow from the water around the boat causing damage to it.

• High-efficiency polycrystalline solar cells generate power in any condition
• Has a smart three-step charging algorithm for a safer charge
• Its unique MPPT chip protects your battery
• MPPT controller generates up to 30% more solar power than others
• Has a LED light to indicate battery status
• The system is IP65 waterproof, so it won’t be susceptible to water damage
• Designed to work only on 12V batteries

Easy to install through grommets or adhesives

Setting up traditional solar panels on regular surfaces like walls and roofs can be difficult as it is. It might be trickier on a moving, swaying boat.

Make sure your marine solar panels are a breeze to set up. Look for ones that are okay to simply stick onto surfaces with adhesives, or have pre-drilled holes so you can screw them onto a mount quickly.

Provides an adequate amount of energy to power up your batteries and appliances

Select marine solar panels that will give you the right amount of solar power to meet your energy requirements.

For example, if you only need solar power on the boat to charge devices in the short term, 50W or 100W might be enough for your trip.

However, if you intend to use your solar panel to charge marine battery, you’ll definitely need one that converts a higher amount of solar energy—perhaps some 200 watt marine solar panels.

Comes with all the necessary accessories, like connectors and junction boxes

Don’t put yourself through the hassle of buying each part of your marine solar system separately. Look for solar panels that provide all the necessary cables, boxes, and accessories to get you set up immediately. Ensure that your panel comes with connectors, junction boxes, charge controllers, and more.

Manufactured by a legitimate and respectable solar power brand

You must always purchase solar panels from legitimate brands that will give you top-notch and high-quality panels. There are many bogus panels in the market today, so double-check to make sure the solar panels you’re buying come from good, renowned manufacturers

If you’re not sure which solar panels to buy, it’s wise to go for classic, tried-and-tested brands. These include Renogy, TP-Solar, and SunPower marine solar panels.

Plus, buying from bigger brands will increase your chances of getting a product warranty that lasts years.

It depends on how much power you need to keep your appliances and gadgets up and running.

For shorter, one-day excursions, you can live with just one or two high-quality solar panels to provide some electricity to charge your phones and maybe a mini-fridge for the day.

But if you’re planning to sail for longer and live on the boat 24/7, you’ll probably need a bigger boat solar system with as many solar panels as you need. This is because you’ll likely have to run bigger appliances and lights, which demands more solar energy.

If you have a 12V marine refrigerator, it will likely only use up anywhere between 2-6 amps per hour. One solar panel emitting a usual 100 watts is more than enough power for such a fridge.

There are many different ways to set up solar panels on boats. If your solar panel is flexible, thin, and ultra-light, you can simply secure it in place with adhesives.

Thicker panels may need to be screwed in with grommets. If this is the route you’re going for, make sure you have sturdy mounting hardware to place your solar panels in.

Traveling through water may be relaxing and stylish, but the excursion is never complete without the best marine solar panels to provide solar energy and battery power during your trip. Hopefully, this round-up of traditional and flexible marine solar panels reviews help you out on your hunt to find the best panels.

Just make sure your panels are efficient in providing high power, waterproof to avoid damage from the sea, and thin and lightweight for easy mounting and storing. If you tick all those boxes, your sailboat solar panels should be all good.

I am Kathleen Miller, staff writer and reviewer of the Avasolar team. Working with the team has been a pleasure for me so far, I hope to bring readers useful information by creating detailed and easy-to-follow contents.

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The Best Solar Panels for Boats of 2024

Solar panels are a great way to give your boat energy and power. If you like taking long rides on motorized watercraft, having solar panels can reduce your energy costs. They also make sure that the boat is efficient and never runs out of power in an emergency. There are multiple options for solar panels available, which can make the market search even more confusing. To help you find a suitable pick, we have shortlisted and keenly reviewed our favorite solar panels for boats in 2024.

A top-quality product not only lasts long but also delivers efficient results. This is why it is essential to invest your money in high-end solar panels. All our products are selected based on their overall performance and ability to deliver high-end results.

Our Top Picks

• Best Overall: Renogy Solar Panels for Boats Shop Now ➔
• Most Lightweight Design: Rophie Solar Panels for Boats Shop Now ➔
• Premium Kit: TopSolar Solar Panels for Boats Shop Now ➔
• Best Backup Kit: ECO-WORTHY Solar Panels for Boats Shop Now ➔
• Simple Installation: Sunway Solar Panels for Boats Shop Now ➔
• Premier Foldable Panel: EF ECOFLOW Solar Panels for Boats Shop Now ➔
• 1 What to Consider When Buying Solar Panels? 
• 2 Size 
• 3 Type 
• 4 Accessories 
• 5 How Do Solar Panels for Boats Work? 
• 6 Installation
• 7 What Are Care Requirements to Enhance the Life of Solar Panels for Boats? 
• 9 Cleaning 
• 10 What Are the Properties of Charge Controllers for Solar Panels for Boats? 
• 11 Basic charge controllers 
• 12 Mid-range charge controllers
• 13 Max power charge controllers 
• 14 Conclusion 

Can solar panels for boats run a trolling boat motor?

How long does it take for a solar panel to charge your boat’s battery, why do people consider installing solar panels for boats, the best solar panels for boats, best overall.

Renogy Solar Panels for Boats

The Renogy are 100W monocrystalline solar panels providing an average of 400-500Wh or 33-41Ah of electricity per day, so you have reliable performance. It has bypass diodes that protect the solar cells from overheating, so you don’t have to worry about maintenance. In addition, it features a corrosion-resistant aluminum train providing extended outdoor use without any extra damage.

These solar panels come with pre-drilled holes on the back so that you can install and mount them without spending money on professional help. They measure 42.2 x 19.6 x 1.38 inches and weigh 14.3 pounds, making them lightweight and convenient. Moreover, you can install them on boats, rooftops, cabins, and more for multifunctional use. Because of their efficiency and reliability, these solar panels stand at the top of our list.

• They are weather-resistant 
• These solar panels maintain cell temperature 
• Provide reliable performance
• Only compatible with Renogy ground mounts and brackets

Most Lightweight Design

Rophie Solar Panels for Boats

The Rophie Solar Panels easily stands out on this list. Designed with impeccable efficiency, they accelerate solar charging to the next level, making it ideal for outdoor enthusiasts and off-grid boat owners. These solar panels convert sunlight into power rapidly, while their ultra-light, foldable design ensures convenience during transport and installation. Don’t let their light weight fool you, though, as they pack an impressive 200 watts, delivering unmatched power performance for your boat or outdoor camping.

These panels don’t just excel in efficiency and power; they’re also built to endure. Their IP67 waterproof grading ensures that they remain operational even under challenging weather conditions. Their high-quality MC-4 connectors further optimize power transfer while ensuring safe and secure connections. Plus, their compact design won’t take up much space, proving to be the optimal choice for boat owners who value both power and convenience.

• Lightweight and easily transportable
• Durable and water-resistant
• High-performance with 200W
• Can be a little pricey

Premium Kit

TopSolar Solar Panels for Boats

The TopSolar Solar Panels are available in a kit containing 20W solar panels, a solar charger regulator of 12V/24V, two 6.5-foot cables with alligator clips, and an O-ring terminal to have a complete experience while on the go. They are perfect for off-grid 12-volt battery charging systems providing you with various DC applications like cabins, boats, battery-operated gates, and more. They come with a 10A solar charger controller preventing the battery from overcharging, discharging, and risk of short circuit for a safe experience. 

These solar panels have aluminum and tempered glass frames, ensuring a durable and weather-resistant use. Weighing 2.75 pounds and measuring 2.32 x 13.86 x 17.13 inches, they are compact and portable. 

• Easy to store and carry 
• They come in a complete kit 
• Provide excellent weather resistance
• Not suitable for large areas and machinery

Best Backup Kit

ECO-WORTHY Solar Panels for Boats

The Eco-Worthy Solar Panels are 10W 12V solar car battery chargers that can be used to recharge boats, motorcycles, boats, snowmobiles, and tractors. They feature a cigarette plug option supplying you with constant power when needed. This kit includes a cigarette lighter adapter, one pair of battery clips, and four-piece PVC suckers ensuring maximum results in no time. 

They also have energy-saving, built-in blocking diodes that prevent reverse discharge from maintaining and extending battery life for maximum durability. It measures 1.4 x 9.6 x 15.3 inches and weighs only 1.5 pounds, so you have a compact product at hand

• They are available in a complete kit 
• These panels are lightweight and compact 
• They can recharge different types of vehicles
• Only designed for vehicles

Simple Installation

Sunway Solar Panels for Boats

The Sunway Solar Panels are battery charger panel mounts that require a simple installation on any windshield or dash, giving you a quick and convenient experience. They come with 12-volt batteries and a maintainer that protect your panels from overheating and discharging, ensuring safe and convenient use. In addition, these panels are equipped with ultra-clear PC glass, so you have a strong and durable product. 

They contain built-in blocking diodes that prevent reverse charging allowing your battery to maintain its useful life. Moreover, they also come with a blinking LED charge indicator that lets you know when the job is done.

• Comes with a battery maintainer
• Do not require professional installation 
• Comes with charging indicators
• Suitable to recharge small batteries only

Premier Foldable Panel

EF ECOFLOW Solar Panels for Boats

The EF Ecoflow provides 160W solar portable and foldable solar panels, delivering a compact and easy-to-carry experience. They are designed to produce maximum power at any time of the day when paired with an EcoFlow power station, so you never run out of electricity. Moreover, they have a seamless one-piece waterproof design, so you can use them during outdoor activities like camping and hiking. 

These solar panels are also equipped with protection during transportation, enabling you to carry them without any concerns. Each pack comes with an Ecoflow 160W solar panel, kickstand case, user manual, and warranty card, so you don’t have to make any additional purchases. 

• They can be folded for easy storage 
• Comes in a complete kit
• Suitable for different outdoor activities
• Can only be paired with an Ecoflow power station

Solar Panels for Boats Buying Guide

We have compiled a detailed buying guide to help you pick a suitable product. It will give you an idea about your requirements for solar panels for boats. 

What to Consider When Buying Solar Panels? 

Since solar panels are an expensive addition to your asset list, here are a couple of essentials to remember when purchasing. 

The size of panels is directly related to the size of your boat. You must get something to match the energy requirements of your boat or greater. A solar panel too small might not power it and leave you frustrated. Other than this, smaller products have less battery time which means they will turn off much quicker than something explicitly designed for the size of your boat. 

From PVC to glass covering and fully flexible panels, the type you choose determines their cost. This helps you establish your budget according to your needs. A glass-fronted solar panel is among the most budget-friendly options, but they are not as weather resistant. Besides this, a polycarbonate version is more expensive, but they are incredibly weather resistant and have a longer life. 

Accessories 

A charge controller or maintainer is an essential component available for your boat’s solar panels. This product protects your panels from battery damage. They prevent any risk of overheating, battery discharge, or sudden drops. A charge controller is essential if you want to elongate the battery’s life. Most brands also offer mount brackets, so you don’t have to purchase them separately. 

How Do Solar Panels for Boats Work? 

Solar panels for boats work just like any other portable energy provider. To install it successfully, you must have four components: the solar panel itself, charge controller, inverter, and battery. When solar panels in the boat hit sunlight, they convert it into the electrical current, supplying your boat with the required energy. 

Boat solar panels can work without a charger maintainer (controller), but there is a risk of overcharging your device. Therefore, you must keep it in place to avoid any risk of battery damage. 

The need for an inverter depends on the number of appliances that need a charge. For instance, if you wish to charge multiple devices other than the boat, consider buying a large-capacity product. 

You can opt for professional installation if offered by the brand or any other reputed company. But individuals who have the basics can do it all by themselves. However, you must make sure that all the relevant accessories are available at your convenience. 

Installation

The installation method is divided into three main stages. The first stage is to conduct an energy assessment. In this, you will determine the level of energy that your boat needs to function. Buy a panel that has a higher voltage than your requirements. This gives more room and flexibility to charge other devices. 

Check whether the solar panel can produce that level of energy. Once the capacity is determined, you can decide the exterior of your panels. In most cases, you choose between glass-fronted, polycarbonate, and fully flexible panels. 

What Are Care Requirements to Enhance the Life of Solar Panels for Boats? 

Caring for solar panels is essential as they are a long-term investment and should last accordingly.

Most solar panels are designed to last two to three decades. Caring for them is fairly simple but requires regular attention. All you have to do is keep them clean from dirt, leaves, and other obstructions. Solar panels from reputable brands always come with a warranty for a couple of years. 

Always get a professional repair from the brand in case of any damage. Even if your warranty has expired, we recommend taking your boat’s solar panels to a professional. They might cost a bit more than a local mechanic, but your panels get the treatment they require. 

Another factor to consider here is the useful life of your solar panel. This indicates that they will not be as effective as they age. The depreciation in their quality is slow and gradual. 

If your product has met the end of its useful life, it won’t stop working but will get more prone to damage. So instead of getting frustrated with why your solar panel for boats isn’t working properly, consider getting a replacement from the same brand or changing your product. 

Cleaning 

To clean a solar panel, use lukewarm water with a mild, non-acidic detergent and apply water pressure to remove any visible dirt and debris. Panels for boats are relatively smaller, so you won’t need a lot of supply. Clean any unwanted spots with a damp cloth and leave it to dry. Avoid applying water pressure on smaller models as they might not sustain the burden.

What Are the Properties of Charge Controllers for Solar Panels for Boats? 

Charge controllers are an essential component. They help protect your panels’ battery from damage. There are three main types of charge controllers available. 

Basic charge controllers 

They use pulse width modulation to encode transmission information allowing control of the power supplied to boats or other devices. These are simple chargers that come in at an affordable price range. A primary charge controller is designed to control batteries of smaller solar panels. They might not deliver desirable results if connected with a high-capacity panel. 

Mid-range charge controllers

These controllers also use pulse width modulation but feature an LCD display to indicate current charging levels. This helps the user keep track of the system and unplug the device when it’s ready to use. 

Max power charge controllers 

Designed for high-end and powerful solar panels, they are one of the most expensive charge controllers. You should only attach them to devices recommended by the brand itself. They also maximize the performance of panels. 

Conclusion 

Solar panels are a great way to maximize energy efficiency in your boat and create a durable backup. They are available in different sizes and capacities, so you can find a suitable fit for your boat. This article carefully reviewed the most in-demand solar panels for boats in 2023 that can make a difference in your overall experience. Besides the panel, you should also grab a top-notch charge controller that protects the device from damage and enhances its life.

People Also Asked

Yes, you can run a trolling motor with solar panels, but it is essential to opt for a device that has suitable capacity.

If the panel is according to the desired capacity of the boat, it might take 4 to 6 hours for a full charge.

Solar panels reduce carbon emissions and save money by reducing fuel costs. They also reduce the noise levels caused by a fuel-ignited engine.

Article Contributors

Sail magazine review team.

SAIL Magazine Review Team reports on best-selling products in sailing and boating. The SAIL Magazine editorial staff is not involved in the creation of this content. SAIL Magazine is reader-supported: When you buy through links on our site, we may earn an affiliate commission. The SAIL Review Team is composed of authors, editors, and sailors. Artificial Intelligence (large language models) may have been used in the research and creation of the content.

To ensure questions about product testing or a specific article are addressed, please contact [email protected]

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Best boat solar panels: 6 options for boosting your yacht’s power

• Phil Sampson

We take a look at 6 of the best solar panels for boats, from folding units to cutting-edge flexible panels

Free power forever? If only it was that simple! Photo: Graham Snook

For many in the boating community, boat solar panels represent something of a holy grail. They are, after all, the gift that keeps on giving, aren’t they? Free power forever, (or many years anyway), coupled with zero running costs – what could possibly be better than that?

All you have to do to make this dream come true is banish the memory of the purchase price from your mind – something boaters are notoriously adept at doing – and wait for the sun to shine. If only it were that simple…

The fact of the matter is that there are costs associated with boat solar panels beyond the price of the panels themselves. While some types of panels can be simply laid on the deck, in many cases some form of mount will be required.

Then there’s the wiring to hook them up to your battery, plus any fitment and/or cosmetic work needed to hide the cabling from view. If your panels are to be left connected permanently, you’ll require a regulator too.

This will prevent both overcharging and a reverse flow of power out of the battery after dark. If you do not fit a regulator, a blocking diode can be used to halt the reverse flow instead.

But once all of the above have been overcome – and providing you’ve done your homework to ensure your panels will generate sufficient power to cover your needs – then, yes, it’s a power free for all!

There are many other benefits to boat solar panels too: First and foremost, they work all on their own – solar panels are automatic, so you can just let them get on with the job.

Apart from the occasional wipe over and a wiring check, they’re largely maintenance-free too. Unlike wind generators, (especially like the one with wonky bearings on that boat moored next to you), they don’t make any noise.

And finally, your battery will be pleased, because keeping it from going flat can extend its life.

Here’s our choice of the best boat solar panels.

6 of the best boat solar panels available right now

Giosolar 1,000W flexible solar panel

Best flexible boat solar panel

Delivering a mighty kilowatt of power, (not far off the amount used by a one bedroom house), this Giostar package comprises ten separate 100W panels, each of which is 1,050 x 540 x 2.5mm in size.

Capable of charging either 12 or 24V batteries, a kit of this magnitude is one for the most serious of solar enthusiasts – Eco Experts reckons 660-990W is sufficient for a liveaboard.

Giostar panels are abrasion resistant, anti-rust and dust proof and their junction boxes are sealed and waterproof. The panels are also light, thin and flexible, and can withstand being bent up to 30 degrees.

Price: £1,464.45

Buy it now on Amazon (UK)

Note: We may earn a commission when you buy through links on our site, at no extra cost to you. This doesn’t affect our editorial independence.

Mobisolar 100W foldable solar panel

Best foldable boat solar panel

Mobisolar’s foldable panels are light (4.5kg) and measure 121 x 56.5 x 3 cm when unfolded, with the longest dimension reducing to 60 cm when folded, making them easy to transport.

The panels use advanced technology to provide superior performance, with each panel subjected to a thorough testing routine before and after assembly.

So confident is Mobisolar in its products that the company stands behind its panels with a two-year defect warranty and a five years’ electrical performance warranty.

For maximum flexibility in operation, three USB power outputs are fitted per panel, one delivering 100W, the second 60W and the third 10W.

Price: £145.00

Buy it now on eBay

Eco-worthy 100W solar panel kit

With 100W panels being ideal for keeping batteries topped up, our second offering in this power class is from Eco-worthy, a major player in the solar panel field.

Competitively priced, our link below is for a kit which includes an LCD control unit and four ‘Z’ brackets in addition to the panel itself.

The Eco-worthy 100W panel is of the monocrystalline type, which means their cells are made from an ingot grown from a single silicon crystal of high purity. It’s also a rigid panel, so this particular product would need to be mounted on a frame or flat surface.

Price: £113.99

PV Logic 20W Flexi solar panel

Offered by Force 4 Chandlery, this lightweight semi-flexible solar panel comes complete with a dual battery solar charge controller.

The panel is completely waterproof thanks to its six-layer, heavy-duty laminate finish, and should a wayward crew member plod over it in their size 9s the panel’s dimpled top surface is ‘self healing’.

The controller can handle both 12 and 24V systems and the panel’s PWM (Pulse Width Modulation) charging system is efficient and battery-lifetime friendly.

Supplied with LED battery-status indicators and 4 metres of cable, PV Logic Flexi panels can be bonded to flat or curved surfaces.

Price: £149.95

Buy it now on Force 4 Chandlery

Powoxi 10W solar panel

At the budget end of the market comes this Powoxi 10W solar panel charger kit. While you won’t go far on just 10W of power, this kit claims to be capable of charging and maintaining various 12V batteries.

The kit features a fully automatic charging and maintenance controller, which provides intelligent three-level charging and protection against short- and open-circuits, under voltage and overloading.

A reverse flow system is included and the interface is described as ‘plug and play’. While the panel is rainproof, it will not withstand immersion in water, so this is a product to perhaps leave behind on the dock when you take to the water.

Price: £27.59

Eco-worthy 10W/5W solar panel

The least pricey option we could find anywhere, this baby 5W solar panel is simply a trickle charger. But if that’s all you need then look no further, for this is another Eco-worthy product.

The technology in the panel is polycrystalline, so it’s not the most efficient on the market, but for this power that’s hardly a great concern.

The panel is supplied with two charging options; a pair of crocodile clips which attach directly to the battery, and a cigarette lighter plug.

According to the product’s eBay listing, this seller alone has sold approaching 3,000 of these units – and at this price, we can understand why!

Price: £9.99

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Solar Panels For Boats and Yachts

By Michael Olenick | Jul 26, 2022

The purchase of a boat or a yacht is a coveted purchase for many people. While it certainly adds a new dynamic to one’s life, it’s not the most straightforward investment since maintenance is a huge component of owning a sea vessel. Other than the physical maintenance of your boat, fuel management and maintenance is often a logistical nightmare for many boat owners. Some of these problems include keeping batteries topped off; doing it quietly, as not to bother the surrounding communities; and refueling costs. An easy solution to these problems: solar panels.

Sizing a Solar System for Your Boat or Yacht

• Refrigerator(s)
• Radar & sonar units

When adding up your energy consumption, always round up and add about 10-15% extra Watt-hours to your total, as certain appliances tend to use up more energy during spring and summer months. Once you reach the conclusion that you are ready for a further discussion, you can always reach out to a solar panel expert to get solar quotes, help with your energy calculations, and aid in determining the right number of panels you would need to offset your yacht or boat’s energy usage. Obviously, the number of panels you would need depends on energy usage and vessel size, but solar is a much better option than common fossil fuels when powering your boat.

The Benefits of Adding Solar Panels To a Boat or Yacht

When it comes to adding solar panels to your boat, the benefits are endless. Here are just a few for you to consider:

• Silence: Noisy refueling at docks and extremely loud on-board generators are a thing of the past. Cruise the seas in with zero mechanical noises, and enjoy the natural ocean sounds.
• Minimal Maintenance: The only maintenance solar panels require is a simple rinse off every couple of months, as salt can build up when the seawater evaporates.

• Travel Lightly: With your new panels, you won’t have to lug heavy containers of fuel with you on your trips. More room for wine or martini mix.
• Unlimited Energy: Aside from the occasional cloud in the sky, you will have full access to the sun on the open seas.

Besides the affordability and convenience, solar panels could inevitably save your life. You will never have to worry about running out of fuel when you are out on the water. This will help you avoid any potential emergencies or disasters.

Solar Panel Placement

This is where most caution needs to be taken. When choosing where you are going to place your solar panels on your yacht or boat, you need to take two big things into consideration: shading and security.

When it comes to shading, you want to make sure you place your panels in an area that receives the most sunlight. Having your boom shade some of the panels, or any lines can reduce your energy production. The wiring of solar panels can also be delicate. That is why you need to place your solar system in the most secure spot possible – rough seas or choppy waters could lead to a wire shaking loose.

If you’re longing to make a maintenance upgrade to your nautical vessel, a solar system should be seriously considered. Not only will it reduce noise, weight, and fueling costs, but it will differentiate your boat from all the other vessels at your next port.

Whether you have questions about panel placement, efficiency, or just if your boat is right for solar, please click here to speak to an expert!

Solar Panel Installation Process

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8 Best Boat Solar Panels in 2024 to Power Your Boat Sustainability

With plenty of sunlight but no access to mains electricity, solar power is made for boating, but this doesn’t mean you can use just any solar panel on your boat.

Green Coast is supported by its readers. We may earn an affiliate commission at no extra cost to you if you buy through a link on this page . Learn more .

Solar power is the perfect solution for meeting your energy needs when you’re out on the water, but you can’t necessarily use the same solar panel you would on your home. Here are our top picks for the best boat solar panels, as well as some info you should know when buying a marine solar panel.

The best marine solar panels for your boat

Thanks to advances in solar technology, there’s now a dizzying array of solar panels available on the market in various forms. However, some are better suited to marine conditions than others: the following products are your best bet to install on your boat.

1. Renogy 400 Watt 12 Volt Solar Premium Kit

For a truly powerful solar system, look to this 400-watt solution from Renogy . This comprehensive kit includes four 100-watt solar panels, a 40-amp MPPT charge controller, module fuse, mounting brackets and an adapter kit.

Combined, the panels output up to a total of 2.5kWh of electricity per day (provided there’s enough sun), to power most boat engines with power to spare for appliances.

The high-quality panels have a bypass diode that bypasses cells that are performing poorly because they’re in the shade, to minimize power drops when the solar panel is in partial shade, and therefore delivering strong performance in a low-light environment.

However, you will need enough space on your boat to accommodate four 40 x 21 inch panels, which will probably only fit on a larger vessel. Online reviewers also complain that the kit doesn’t come with detailed assembly instructions, so you may struggle to put everything together, especially if you’re a beginner.

What we like:

• Powerful: The total system delivers 400 watts of power output, or 2.5kWh of electricity, in optimum conditions.
• Bypass diode: Which maximizes the solar panel’s performance by bypassing cells that are in the shade, allowing the panel to perform well in low light.
• Powerful: This kit will produce a total of 400 watts, so is great for charging larger boat batteries or running a number of appliances onboard.
• Solid and durable: The panels have multi-layered sheet laminations and come in a corrosion-resistant aluminum frame, so will stand up to different conditions without damage, so you can be confident they’ll stay in good condition wherever you take your boat.

What we don’t like:

• Instructions not very extensive: The kit doesn’t come with an extensive manual to help you put everything together, so you might struggle if you’re not particularly handy.

Despite the lack of clear instructions, overall this is a well-made, powerful solar kit. If you need lots of power and have the space for four solar panels, this could be the best choice for you.

2. Newpowa 20W Monocrystalline Sailboat Solar Panel

This panel is a good choice if you have limited space and don’t need too much power for your boat. Each panel has only 20 watts of output, but is very compact: in fact, the new design is highly-efficient, allowing it to be even smaller than previous models, at just 13.6 x 14.2 inches.

With such small dimensions, you may be able to install several panels on an irregular boat roof or in other tricky spots. However, keep in mind that even with a few of these panels, you probably won’t have enough power to run your boat battery.

Newpowa’s 20-watt solar panel is built to last. It comes with a two-year workmanship warranty, and an output warranty that guarantees 90% power for 10 years, and 80% for 25 years.

The panel is slim, but with sturdy aluminum frames around the panel and between each cell, so it’s designed to stand up to harsh conditions, including winds up to 2400Pa and hail and snow loads of 5400Pa. Therefore, you’ll be able to take this panel on your boat through all kinds of weathers without it being damaged.

• Compact: At just 13.6 x 14.2 inches, this small panel will fit in all kinds of tight spots, making it easier to find a mounting location on your boat.
• Good workmanship: The panel is well-made, backed up with a generous warranty, meaning you can feel confident that on the slight chance of any faults or issues, they’ll be resolved by the manufacturer.
• Durable: The Newpowa panel has a sturdy aluminum frames between each cell, and can stand up to high winds, hail, and snow, which is obviously very important for solar panels for boats
• Low power output: This panel has a relatively-low 20-watt power output, which isn’t great because it will only supply enough energy to run one or two appliances part time.

Small, slim and durable, this high-quality solar panel is perfect if you have low power needs on your boat, or as part of a larger solar system.

3. ACOPOWER 35W Polycrystalline Sailboat Solar Panel

Specifically designed for boats, this small polycrystalline solar panel provides 35 watts of power. It’s highly efficient with a conversion rate up to 19.1%, so you’ll get the maximum amount of power output in return for the precious space on your boat.

Suitable for all climates and conditions, the silicon cells have a protective coating and come in a corrosion-resistant aluminum frame. It’s rated for high winds to 2400Pa, snow loads to 5400Pa, temperatures between -40 and 176 degrees F, and up to 100% humidity.

We also love that this panel is easy to install, coming with four pre-drilled holes, junction box and a three-foot solar cable. It’s compatible with a range of mounting systems, including Z-brackets, pole mounts, and tilt mounts, making it easy to place virtually anywhere on your boat, from the roof to the stern.

• Suitable for all weathers: The panel is rated for extreme cold and hot temperatures, as well as high humidity, winds, and snow loads, which is good because boat solar panels may be exposed to all of these conditions.
• Easy to install: It comes with pre-drilled holes for easy installation, as well as being suitable for various mounting systems, so can be mounted in varying locations on your boat’s roof.
• Highly-efficient: This panel has an impressive maximum conversion rate of 19.1% so will perform well in low-light environments, meaning you’ll still have power on overcast days.
• Inconsistent quality control: Some reviewers mention issues with parts and accessories failing or breaking, though many also mention the manufacturer quickly resolved the problem. However, it’s worth remembering the affordable price of this panel – so if the quality issue is a big concern, better to opt for something more premium. 

Some online reviews mention issues with some parts breaking during install. However, with a five-year workshop warranty, a 20-year power output warranty, and lifetime technical support, you can feel confident that, on the slight chance that you do experience any issues, they’ll be resolved easily. 

Despite even this, the Acopower is worth your attention because of its affordable price and easy, out-of-the-box design that’s easy to install right out of the box.

4. Newpowa 160W Monocrystalline Sailboat Solar Panel

For significantly more power, consider this 160-watt panel from Newpowa. The panel does involve a higher investment than small panels, but you’ll be able to charge your boat battery and perhaps even run some appliances with the power this product delivers.

The panel is made of top quality, high-performance polycrystalline cells fitted with an aluminum frame, making it efficient but durable. It uses 9 busbars (9BB) technology which converts light more efficiently while lasting longer.

It’s also easy to install, coming with diodes pre-installed in the junction box, as well as two pre-attached 3-foot MC4 cables, so all you need to do is mount the panel and you’re good to go! The well-made panel comes with a 10-year 90% power output warranty, 25-year 80% output warranty, and two-year limited material and workmanship warranty.

• Highly efficient: This panel’s use of 9BB technology makes it more efficient and longer lasting than many other panels.
• Easy installation: With pre-installed diodes and pre-attached cables, this panel is a piece of cake to install, so it’s a great option for those who aren’t experienced with this type of thing.
• Long life: The panel is made with advanced 9BB technology that is efficient and long-lasting, so you won’t need to replace your panel for years to come.
• Expensive: You’ll pay more for the extra power, so it’s important to be sure that a smaller panel won’t suffice.

This powerful and efficient Newpowa panel is built to last, evidenced by the generous manufacturer’s warranty, making it an excellent boat solar panel.

5. Nature Power 120W Portable Sailboat Solar Panel

This portable solar panel from Nature Power can be set up and used anywhere, so is a great solution if you don’t have space on your boat to install a permanent panel. Equally, this can be a good option if you only want to use it on a boat occasionally, and also use it when camping, trekking, or at home during emergencies.

The compact, foldable panel can be set up anywhere there’s sun, and then easily stored or transported after use. The panel folds out to 67.2 x 24.8 x 3 inches, and then can fold up into the size of a slim suitcase with an easy-carry handle.

Thanks to its high-efficiency, monocrystalline cells, this small panel can produce up to 120 watts and 6.67 amps of output. It also comes with a charge controller to help you efficiently charge your battery, and a built-in diode to avoid discharging.

Although the panel itself is well-made and robust, some online users complain that the clips and stand are less durable, with some reporting breakages.

• Portable: The panel can be folded up and easily transported, thanks to its easy-carry handle. This is great because you can use it on your boat when needed, then for other uses, such as for camping or emergencies.
• Highly efficient: Thanks to its advanced monocrystalline cells, this panel delivers 120 watts despite its small size and slim design.
• No need to install: Simply set up the panel on your deck when you need some power, and then fold it away, so a great option if you don’t want to fuss with installation or don’t have space on your boat to put it up permanently.
• Low-quality accessories: Some online reviews mention the poor quality of the panel’s accessories such as the clips and stand.

Overall, this portable solar panel is a great choice if you’re unable to mount a panel on your boat, or want the freedom to use it in different locations.

6. Nature Power 165W Sailboat Solar Panel

This monocrystalline solar panel is powerful, durable, and efficient . The modular design, robust aluminum frames, and scratch-resistant, anti-reflective coating means the panel will stand up to all weather conditions, making it perfect for your boat.

This panel is sold on its own, but the brand also offers an 8-amp solar charge controller that you can use with any 12-volt battery to build your own boat solar kit. The panel itself comes with a built-in diode, as well as “plug and play” connections that are easy to install.

• Monocrystalline: The monocrystalline cells make this solar panel very efficient, giving you a powerful output of 165 watts with just one panel.
• Robust: The panel is built to withstand all conditions, with a strong aluminum frame and scratch-resistant coating.
• Easy to install: The panel comes with simple, “plug and play” connections, making it a breeze to install, so is perfect for beginners.
• High cost: Because of its premium construction and features, this is not the most affordable solar panel on the market.

This panel is relatively expensive, and there are more affordable options available, but you get a high-quality, well-made panel in return for your investment. Furthermore, it comes with a 25-year power generation warranty, so you can be confident that you’re unlikely to encounter any major issues for years, and if you do, they’ll be resolved.

7. Topsolar 100W 12V Solar Panel Kit

This complete solar kit contains one 100-watt solar panel, intelligent charge controller, v-shaped tilt bracket, as well as two 16-foot and two five-foot cables with MC4 and O-ring terminals, making it easy to install and connect.

This set is designed for off-grid, outdoor use such as on boats, RVs, cabins, and yards, and suitable for charging car and boat batteries. The panel is highly durable, thanks to its corrosion-proof aluminum frame and tempered glass coating, so will cope with whatever conditions you throw at it.

The high-efficiency monocrystalline PV cells deliver 100 watts of power in a relatively compact 46.5 x 21.8 inch panel that’s just 1.37-inch thick. The adjustable mounting bracket can tilt to capture the maximum amount of direct sunlight, helping you get the maximum amount of power for your boat.

• Complete kit: With a 100-watt panel, charge controller, bracket, and cables, you have everything you need to set up and install your marine solar system.
• Tilted mounting bracket: Meaning you can tilt the panel to capture the maximum amount of sunlight.
• Versatile: The kit comes with two 16-foot and an additional two five-foot cables featuring both O-ring and MC4 terminals, meaning you can connect it to different types of equipment and in various locations.
• Problematic controller: Online reviewers complain about performance issues with the charge controller.

The most common complaint about this set is that the controller is low-quality, though the panel itself works very well. However, overall this is a good set for any boat with medium power needs.

8. 200 Watt 12 Volt Monocrystalline Solar Starter Kit w/ MPPT Charge Controller

This kit comes with two 100-watt poly/mono-crystalline solar panels, a 40-amp MPPT charge controller, Z-brackets for mounting the solar panel, an adapter kit, and connector cables. However, it should be noted that the kit lacks a few important accessories, such as fuses, so you’ll need to buy these separately.

Although these two 100-watt solar panel can supply up to 800Wh power output a day if there’s enough sun, they have a small footprint. This makes the kit ideal for boats, as you can install them in small and compact spaces, like the roof of your sailboat.

The solar panels are also highly-efficient, with 22% solar cell efficiency , significantly higher than many comparable products. With a corrosion-resistant aluminum frame, the panels will also stand up to all weathers, including winds of up to 2400Pa and snow loads of 5400Pa.

This means you can be confident they’ll last for decades no matter what kind of conditions your boat faces over the years!

• Maximum power for the footprint: The solar panels are highly-efficient, giving you the maximum amount of energy without taking up too much space.
• Corrosion-resistant frame: The aluminum frame is resistant to corrosion, so will keep its form in salt water and harsh weather.
• Charge controller included: The kit comes with an MPPT charge controller, adaptor, cables, and mounting brackets, so you won’t need to invest in extra equipment and can get started straight away!
• Some accessories not included : Although this is sold as a complete kit, it lacks a few important bits and pieces, so you’ll need to be prepared to avoid disappointment when trying to install your panels.

Overall, this is a good medium-sized kit that delivers a reasonable amount of power with the minimum footprint.

Why buy a boat solar panel?

Most boats require a lot of electricity, from powering navigation lights and radio systems to maintaining autopilot and, most of all, the boat battery. If you use your boat for longer trips, you’ll probably also need electricity for appliances like fridges, heaters, and even a TV.

Traditionally, many boats used gasoline or diesel generators to supply this power, but relying on solar energy instead has a number of advantages. Not only is it more environmentally friendly, but the sun will always shine (even if it’s not full sun), so you’ll have a continuous supply of energy and won’t need to worry about running out of fuel.

Furthermore, unlike noisy, smelly generators, solar systems are quiet, odorless, and don’t create excess heat, so won’t make your boat unpleasantly warm in summer. Once you’ve made the initial investment, solar panels are cheap to run, as you don’t need to pay for fuel – after all, sunshine is free!

What to consider when buying boat solar panels

There are many different types of solar panels, just as boats can come in all shapes and sizes. Therefore, it’s important to consider the various features offered by different panels in order to choose the right model for your boat.

Here are the key things to keep in mind when shopping for boat solar panels.

Panel output and efficiency

The first thing to consider when buying a solar panel for your boat is how much power it will produce, and whether this will be sufficient to meet your needs. You need to consider what you want to use the panel for: for example, do you just want to run a couple of onboard appliances, or are you looking to power your boat’s battery as well?

Once you’ve determined this, calculate how much power you’ll need (more on how to do that below), and this will give you an indication of the power output you should look for when buying your panel.

It’s important to get a robust panel that will stand up to all kinds of weathers and conditions without getting damaged.

The most durable panels come with a sturdy metal frame, often made of aluminum to keep weight to a minimum.

Waterproofing

Obviously, the ability to stand up to water is essential for any marine solar panel. Most good-quality solar panels for any purpose are highly resistant to water, as they’re designed to be placed outdoors in the rain.

Even still, it’s important to check that waterproof level of any solar panel before buying it for your boat. Specifically, look for a panel with a IP67 rating, as this indicates that the panel is highly resistant to water damage.

Weight and flexibility

Another important factor to consider is weight. You usually have two options when installing a solar panel on a boat: on the roof or on the stern, usually supported with some kind of bracket or scaffolding.

As neither boat roofs nor brackets are typically designed to support a lot of weight, it’s important to buy panels that are light. With limited space and low clearance, it can also be a good idea to look for thin panels that are not much more than an inch thick.

As most boats have curved roofs, a flexible solar panel can often be the way to go. These kinds of panels are not rigid, but can bend to fit irregular surfaces.

However, flexible solar panels tend to be less efficient and generally don’t last as long as rigid ones, so you’ll need to weigh up these factors to make the right choice for you.

Ease of installation

When buying a solar panel for any purpose, how easy it is to install is a key consideration, unless you’re planning to hire an expert to handle this for you. This is even more critical when buying a marine solar panel, as installing the equipment is more difficult than ever on a boat that may be moving and swaying with the waves.

Pay attention to how the panel is installed: flexible solar panels can often be simply attached with an adhesive, though you’ll need to make sure the glue is suitable for marine applications. Rigid solar panels can be more difficult to put up, though some come with grommets and pre-drilled holes that make things easier.

Reading user reviews on sites like Amazon will usually give you a pretty good idea of whether the panel is tricky or pretty straightforward to install.

Questions to ask yourself before buying t solar panel for your boat

The right solar panel for you will depend on a range of factors, from the size of your boat to your power needs. Understanding these key factors will help you to make the right decision and buy the perfect marine solar panel for you.

What size solar panel do you need?

You’ll need to work out how much energy you need to determine the right size solar panel to buy. You can calculate this by adding up the typical amp hours and volts used by all of the appliances on your boat – the average amp hours are usually printed on the label or elsewhere on the appliance.

For a more accurate measurement, use a battery monitor to get a reading of the amp hours your boat uses. Monitor your usage over several days while you’re on the boat (the more the better) and divide the total figure by the number of days to get your average amp hour usage per day.

How big is your boat’s battery?

You’ll also have to consider the size of your boat’s battery. Other than the power you use in the hours of peak sunlight in the middle of the day, you’ll only be able use as much energy as you can store.

Also keep in mind whether you want to be able to charge your boat’s battery with solar or run your boat on gas and use the solar panel for appliances only.

Most boats have a 12-volt battery, which needs around 350 watts of power to charge. However, larger vessels can have a larger battery, which means you’ll need more panels.

Do you have enough space for a solar panel?

Once you’ve determined the ideal solar panel size for your boat and your needs, you also need to work out how much space you have to accommodate the panel. Assess your boat for suitable locations, keeping in mind that you need to install your panels somewhere that gets plenty of sun.

You can either mount your boat solar panel on the roof or on the stern, using a bracket or similar.

If you want to mount the panel on the roof, you don’t necessarily need a completely flat spot: flexible solar panels can be installed on curved surfaces, with the added bonus that they’re lightweight so can be put on boat roofs that can support too much weight. Likewise, high-efficiency panels that offer the same amount of energy with a smaller footprint, like the ACOPOWER 35W Polycrystalline Sailboat Solar Panel can be a good solution for smaller boat roofs.

If your boat really doesn’t have any suitable spots to mount a solar panel, a backup solution would be to use portable solar panels that you could set up on your deck or a similar space.

Do you need a charge controller?

When setting up a solar system for your boat, you also need to decide whether you want to include a charge controller . Some of the kits above come with a solar charge controller included, like the Topsolar 100W 12V Solar Panel Kit , but you can also buy solar panels on their own.

Charge controllers regulate the amount of energy that flows from the solar panel to the battery, helping to ensure that it doesn’t get overcharged or overloaded. This is important, because either of these things can damage the battery and shorten its life.

For this reason, although a solar charge controller is not strictly necessary when installing solar panels on your boat, it can be a very good idea in order to protect your battery and make sure your boat uses the right amount of energy for its needs.

Wrapping up

A boat solar panel is the ultimate solution for self-sufficiency, allowing you to run your boat on the energy of the sun. You won’t need to worry about running out of fuel, and having to go back to shore.

Not to mention that by using this clean, renewable energy will help you to reduce your carbon footprint and be kinder to the environment.

If you’ve found this guide to the best solar panels helpful, you’re sure to enjoy our posts on the best portable solar panels for camping , flexible solar panels and solar power output .

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Top 3 Best Solar Panels For Sailboats

Last Updated by

Daniel Wade

June 15, 2022

Choosing whether or not to install solar panels on your sailboat is a big decision. They are not exactly cheap, though they can start to pay themselves off pretty quickly.

This article is going to cover not only why you might want to use solar panels but all the benefits they provide. You will also find a helpful guide on which solar panels would be best for you and your budget. Hopefully, by the end, you will feel confident in your decision to install solar panels on your sailboat and even have an idea of which ones you might like.

Table of contents

Are solar panels on sailboats necessary?

Whether or not you should be installing solar panels on your boat is a matter of choice, not out of necessity. Sailboats get their power from the wind, by harnassing it in their sail. So if you plan to be sailing for the afternoon you probably don’t need solar panels.

You could charge a battery pack from the marina and that will probably see you through several trips. The problems only really start to arise if you are planning to be on your sailboat for longer periods, or even permanently. If you plan to live on your sailboat year-round, even if you spend 80% of it in a marina, you would be better off with some solar panels. Even if it is just as a backup source of power.

Are solar panels on boats safe?

Solar panels are generally pretty safe. They have no moving parts and typically have a very strong protective cover over them so you never come in contact with the electrics themself. So, as a source of power, they are generally pretty safe. The only time they may become unsafe is if they are badly damaged.

Solar panels are often covered by glass plating that keeps them safe. It also helps them absorb sunlight and warmth. This is great, except when the glass breaks. If the glass protective cover on your solar panels should crack and splinter you are at risk of serious injury from sharp shards of glass. Not only is the glass itself dangerous at this point, so are the electronic components inside. They have powerful currents running through them, and if you come in contact with them you may be in for a shock.

Furthermore, if these electronics get wet they can become deadly. Electricity and water do not mix well at all. Being as you are on a sailboat, at sea, the chances of them getting wet is very high. Luckily, the chances of them breaking in the first place are slim to none. The only real way they would break, besides vandalism, is by debris hitting them during a bad storm. There is not often debris at sea, so this shouldn’t be too much of a problem.

What are the benefits of having solar panels on a sailboat?

There are so many great benefits of having solar panels on a sailboat. They can be a lifesaver if you find yourself at sea for a long time. There benefits range from trivial comforts to being the difference between life and death. Here are some of the benefits you might not have considered about having solar panels installed on your sailboat.

Money-saving

Solar panels are not cheap, it is far cheaper to just run a generator or charge your batteries from the marina the whole time. At least, it is in the short term. Over time, it can start to become very expensive. With solar panels, you are looking at a big initial cost (the solar panels themself) and then it’s smooth sailing. You don’t need to pay for power again. Solar panels last for about 40 years before they start to become too inefficient at producing power. The cost of a few solar panels upfront compared to 40 years of marina fees and gasoline for a generator is the financially savvy move.

Emergency power

If you find yourself at sea, the wind dies down (or becomes too strong), and you find yourself stuck bobbing around waiting for more favorable conditions you may run into trouble. Depending on how long you are out there, you may find yourself with dead electronics. Be it a satellite phone, radio, or secondary engine (depending on the boat). Having a set of solar panels and a power bank can be a genuine lifesaver in these situations.

Comfort amenities

Whether you are day sailing or making a week-long voyage, having access to the comforts in life can make the whole journey so much more enjoyable. The amenities may not be available to you without having a constant source of power at sea. Having access to a kettle, tv, videogame system, radio or microwave oven may be the only thing keeping you going at rougher times. As exciting as sailing can be, when you aren’t sailing and are just bobbing around it can be quite dull. The sea is beautiful, but there is only so much time you can spend looking at the water before you miss the comforts of land. With solar panels, you can bring those comforts with you.

Eco-friendly

There are only two alternatives to solar panels. A gasoline generator, and taking power from the grid. Neither of these is good for the environment. Luckily, solar panels are a great third option. Solar panels are completely eco-friendly and are great for the environment. This is not just great for the earth, and your conscience, but for the journey itself. If you are running a gasoline generator at sea you are going to be listening to it thrumming away and smell the burning gasoline. Wouldnt you prefer silence and nothing but the smell of the sea breeze?

How much do solar panels cost?

How much solar panels cost is almost entirely tied into both their voltage/wattage and whether or not they are portable panels. Portable solar panels are great for people who don’t spend a lot of time on their boat or are happy enough living off the marina’s power grid. Permanent solar panels, the kind that may need to professionally installed, can end up costing far more. They are also likely to be far superior and you can pretty much forget about them once they are installed.

Portable solar panels will cost just a few hundred dollars each. You will need a few to be sustainable, but that’s not going to be much of a problem. These portable solar panels can just be rolled out on the deck of your boat, weighed down, and then hooked up to a battery pack. The battery itself here is going to be the most expensive part of the whole set up. A decent-sized battery could set you back a $1000. But, when charged fully it will last days. Even with constant use.

Permanently installed solar panels can cost one or two thousand dollars in some cases. The advantage here though is once they are installed that’s it, you can forget about them. You don’t have to put them up, take them down, and find somewhere to stow them every time they need using. They too will need to be hooked up to a battery, the battery is still only going to cost you $1000. If you are installing permanent solar panels because you plan to be making long voyages, it is ideal to have two or perhaps even three large batteries hooked up to your boat. One to run off, one or two for emergencies.

How do I maintain my solar panels?

Solar panels, unlike gasoline generators, are generally pretty easy to maintain. They have no moving parts and are thus pretty self-sufficient. They don’t need taking apart and they last as long as 40 years. That being said, if they do break they need repairing as soon as possible. The exposed electrics can be deadly when water is thrown into the mix. Which, on a boat, is almost always. The glass cover will need replacing and the electronics inside may need repairing, though not always. Don’t ever attempt to do this yourself unless you are experienced at making these repairs. The cost of hiring someone to do it for you is preferable to being dead. Solar panels have very powerful electric currents, that when in contact with water and yourself can be fatal. As mentioned above, these panels rarely break so you will likely not ever run into this problem. If you do, hire a contractor.

Do my solar panels need cleaning?

Solar panels work by converting the light and heat of the sun into useable power. The process itself is rather complicated but the results are simple to understand. That being said, there are some reasons that your solar panels will stop working as effectively. They all revolve around a lack of sunlight. It could be because it is night time. It could be because it is very cloudy. Or, it could be because they are dirty. If solar panels become too dusty, dirty, and become too covered in grime they stop operating at maximum efficiency. This is not as much of a problem at sea, the sea spray stops dust settling. The biggest thing you will need to clean off your solar panels is salt build-up and slime. This is easy enough to do with some warm soapy water. Freshwater, not seawater. You want to be removing as much salt as possible. Salt is corrosive to electronics, so removing it is important. Never clean your solar panels using pressure washers as they can crack the glass.

Which are the best solar panels for sailing?

There are so many options on the market at various price points. Here are three very different options that will all make good choices, depending on your needs. It is important to consider not just price but power output. Spending a lot of money on solar panels now might not feel ideal, but it is the most cost-effective decision.

1. Renogy Starter Kit

This starter kit is going to be perfect for installing on almost any sized boat. There are four solar panels, each can be fitted permanently to the boat. They can be mounted (and unmounted) easily, for your convenience. They do require a flat surface, but they are small enough that that likely won’t be too much of a problem. This starter kit is very middle of the pack price-wise but should provide enough power for a small to medium-sized vessel easily. It is also possible to buy extra panels individually should you need them.

Wattage: 400/4 (100 per panel)

2. Nature Power Rigid

The nature power rigid is a large, powerful, single solar panel. If you are looking for the right panels to power your entire boat comfortably, these are the ones for you. They are very large so they will need a large flat surface area. alternatively, they can be hung vertically from rails. This is an inefficient way of using them, so you would need to buy more this way. Nature power makes various solar panels so you could find some smaller ones of the same brand to supplement it. This one is not so easy to install, you might need to hire someone to install it for you.

Wattage: 165

3. Nature Power Monocrystalline

Nature power makes a portable solar panel that fits inside a special briefcase. It is perfect for stowing away easily and only taking it out when it is needed. It is decently powerful considering its portable, but there is the inconvenience factor of having to set it up each time. If you planned to buy the nature power rigid, buying one of these portable panels might be ideal for supplementing your power supply when it is especially sunny. Though, it may be cheaper for you to just fit more of the Nature Power Rigids.

Wattage: 120

Hopefully, you now have a good idea about whether solar panels would be right for you and your sailboat. Sailing is great, but the lack of power at sea can be dreadfully boring. Luckily, there are so many great options available on the market. Not just the ones mentioned above. Buying a solar panel is an investment, the initial cost is minor compared to the steady return from all the savings you will make.

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I've personally had thousands of questions about sailing and sailboats over the years. As I learn and experience sailing, and the community, I share the answers that work and make sense to me, here on Life of Sailing.

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Top 5 Best Solar Panels for Boats (2024 Marine Buyer’s Guide)

In this guide, you’ll learn:

• Why photovoltaic (PV) equipment is great to have on your boat
• Which panels are best suited for use on the water
• What qualities make for a great boat solar panel

Each product and or company featured here has been independently selected by the writer. You can learn more about our review methodology here. If you make a purchase using the links included, we may earn commission.

Why Should You Install Solar Panels On Your Boat?

Before we dive into the best panels to bring your boat into the world of clean energy, it’s worth discussing why you’d want a solar panel system on your boat in the first place.

There are a few use cases that are important to consider. These not only dictate whether or not you need panels on your boat, but they can also help you decide which system is the best and most cost-effective for you. We’ll discuss the different reasons to go solar on your boat below.

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• Doesn't offer solar batteries (coming 2022)

Charging Emergency Equipment

For anyone who has run into issues out at sea, the need for reliable emergency equipment is well understood. Whether you run out of gas, your boat breaks down or you have some other issue that precludes you from getting back to shore, having a way to reach out for help will keep your mind at ease.

Depending on the type of boat you have and how well it’s equipped, you may have a radio system, a satellite phone, a regular phone or some other communication device for emergencies. All of these require power, and having a solar system on your boat ensures that you’ll always have access to these devices.

Charging Recreational Equipment

Even if you’re not running into problems at sea, you might want the ability to charge recreational equipment. It’s always nice to have the ability to charge smartphones, e-readers, speakers and other devices you might use for entertainment.

This is especially important if you plan on spending a few days at sea and don’t want to rely on your boat’s batteries. Keeping those well charged for lighting, navigation tools and starting your boat’s engine is more important than getting your phone up to a full charge.

Quality of Life at Sea

For a lot of people, there’s a lot of joy in upgrading life at sea and making things just a little more comfortable. One of the perks of installing a solar system on your vessel is that you don’t have to worry about using your boat’s batteries for non-necessities.

For example, many recreational boaters connect their solar array to an electric cooler. Others use their solar modules to power electric water heaters for hot showers and constant hot water.

The possibilities for improving your at-sea experience with solar are really up to you, which is part of what makes bringing renewable energy to your boat so exciting.

What Are the Top 5 Best Solar Panels for Boats?

If you’re convinced you want to install solar on your boat, but you don’t know much about the available options, you might be overwhelmed by the choices. You’ll have access to seemingly countless brands and models.

To help you narrow down your options and choose panels that will meet your needs, we’ve done extensive research and chosen just a few product lines that we recommend. We’ll provide a quick breakdown of the different options below, and we’ll dive deeper into the specifications in later sections.

SunPower 170W Solar Panel

SunPower is a leader in the residential solar industry, so it’s no surprise that we found that the company also makes the best solar panels for use on boats.

This panel is pricey, but it’s significantly more powerful than most other options. At 170 watts, you can use these panels to charge your boat’s main battery, provide backup power for emergencies, or live large on the water by powering coolers, hot water heaters and much more.

This panel doesn’t come with a solar charge controller like many other options do, so not only is it expensive, but you’ll have to lay out more money for a controller, inverter and battery. However, we believe the efficiency and power output are well worth the investment.

These panels are also rated with a waterproof rating of IP67, which means they can withstand immersion in water up to about three feet for around half an hour. If you need more protection than that, you have bigger problems on your hands than losing a panel.

• High-efficiency panel for maximum power
• High-quality, durable materials
• Trusted and reliable brand
• Waterproof up to a meter for 30 minutes
• Doesn’t include any equipment other than the panel

Renogy 100W Flexible Marine Solar Panel

The Renogy Flexible solar panel designed specifically for use on the water is our pick for the best bang for your buck. It’s about half the price of the SunPower panel, although it does have a little more than just half the power capacity.

At 100 watts, this panel is great for middle-of-the-road power. It can serve as a reliable backup source of energy, or you can use it to recharge phones, GPS devices, e-readers, laptops and other electronics. It’s possible to use it for the quality-of-life items mentioned above as well.

This panel also has an IP67 waterproof rating, which is ideal for maintaining peace of mind on the water. Although it’s less expensive than our top pick, it includes a controller and wiring to connect your panels. You’ll just need an inverter and a battery to complete your setup.

• Excellent power output
• IP67 waterproof rating
• Includes controller and wiring
• Reliable brand name
• More expensive than many other options
• Doesn’t include a battery or inverter

EcoWorthy 25W Solar Panel Kit

The EcoWorthy solar panel kit is one of the easiest photovoltaic (PV) systems to install, so it’s our top pick for those looking to get started with clean energy. You can purchase this kit with a 10 amp-hour (AH), 12-volt battery, and the MC4 connectors are plug-and-play for a quick and painless installation.

This panel has a much smaller output than our top two picks, so it’s best reserved for backup power or for charging cell phones and other small electronics.

This kit has a waterproof rating of IP65, which means it can withstand being submerged in around five feet of water for up to a half hour, and it will also be protected from sprays of water. This is a great option for maintaining peace of mind when you’re on the water, especially if conditions are rough.

Lastly, the kit includes a panel, a controller and wiring, so you’ll just need to add a battery and an inverter to complete your kit.

• IP65 waterproof rating
• Includes a controller and wiring
• Very affordable
• Significantly less power than our top picks – Only ideal for light-duty use

NewPowa 30W Solar Panel Kit

This 30 watt solar panel kit from NewPowa includes a panel, a controller and wiring. If you add a backup battery and an inverter, you can create a complete off-grid solar kit for less than $150 without leaving your home (thanks to Amazon).

With an output of 30 watts, this is the best marine solar panel for light-duty use, although you could use it for non-essential electronics like an electric cooler or a small solar water heater. Those more demanding devices should be low-use, though.

The panels and controller are IP67-rated, so they’re suitable for use on just about any boat.

Best of all, the partial solar kit is just $60, so this makes our list as our top budget pick for going solar without breaking the bank.

The kit has pre-drilled mounting holes and is compatible with a wide variety of mounting brackets. As such, your installation process should be relatively straightforward.

• Includes a controller and plug-and-play wiring
• Relatively low wattage

TopSolar Monocrystalline Solar Panel Kit

The off-grid solar kit from TopSolar is a great affordable option, and it’s what we’d recommend as a starter kit for backup energy for beginners. It only puts out 20 watts, so this is not the best option if you’re looking for something to charge your recreational devices or quality-of-life equipment. However, it’s an affordable and easy-to-install kit for emergency power.

Unfortunately, this kit doesn’t include a specific ingress protection (IP) rating, but the manufacturer does note that the product is waterproof. Based on customer reviews, it appears that this product is safe for use on the water.

The kit includes a small PV panel, a controller and wiring, so you’ll need to buy an inverter and battery separately if you want AC power or backup power.

Best of all, the kit is super easy to install. It has pre-drilled holes and is compatible with most mounting brackets and clips.

• Great option for backup power
• Easy to install
• No official IP rating
• Low wattage

What Should Boat Owners Look for When Buying Solar Panels?

Solar panels can be a great option for marine use, but not all panels and solar kits are suitable for use around water. Additionally, the panel you choose needs to be selected based on how you want to use your solar power system.

In the sections below, we’ll include a few key things you’ll want to consider when choosing a solar module for your boat.

Energy Needs

One of the first things we recommend thinking about is how much energy you need your panels to generate. This will help guide you to what size panel and how much energy output you need.

If you’re just looking for reliable backup power for your boat’s internal 12-volt battery, or you want your panels to provide power for emergencies only, you’ll probably only need a panel of around 20 watts.

If you use your boat frequently for entertaining guests, or you spend days at a time on your boat, you might want something above 100 watts to provide backup power plus electricity for electric coolers, water heaters and more. Consider everything you’ll use your solar array for and size your system accordingly.

The chart below provides a quick breakdown of what size solar panels you need for different purposes on a boat.

If you plan on using your panels to replace an on-board generator, you can calculate how much electricity your boat uses and then size your system accordingly. It’s always advisable to go a little bigger than you think you need, as cloud coverage and the angle of the sunlight hitting your panels can cause fluctuations in solar power production.

If you have high energy needs, we also recommend considering a Maximum Power Point Tracker (MPPT) controller, which is more efficient than a Pulse Width Modulation (PWM) controller, which is more common.

Space Available for Installation

Just like residential solar systems are limited by available roof square footage, marine solar systems are limited by the available space for installation. This is an important consideration to make to ensure you don’t buy a panel that you won’t be able to mount or use in your vessel.

Before you buy any equipment, we recommend checking the measurements of the panel and deciding where on your boat you can install it. Some portable, foldable panels come with kickstands for temporary setups, but the smaller of our top picks can be set up just about anywhere without mounting brackets as well.

Type of Solar Panel

You’ll have a few choices for the type of panel you purchase for your boat as well.

First, you’ll need to decide between thin-film solar panels, polycrystalline solar panels and monocrystalline solar panels.

• Monocrystalline panels are the most efficient, so they’re the best suited for use on boats. The higher efficiency ratings will let you produce more energy per square foot, which is essential on a boat where space is limited. All of our recommendations above are monocrystalline.
• Polycrystalline solar panels can also work, but they won’t provide as much solar power.
• Thin-film panels are the most affordable, but they generate even less electricity and aren’t ideal for use where available space is minimal.

Second, you should think about whether you want a rigid solar panel with an aluminum frame or a semi-flexible one. Flexible panels contain special solar cells that can be a bit pricier, but they’re easier to install and are a bit more versatile. They can be mounted on curved surfaces, giving you more placement options.

Waterproof Rating

Since you’ll be using your panels on the water, it’s essential that you choose one with a good waterproof rating. Some of the best options are IP67 and IP65. These will ensure your panels and charge controllers or regulators remain safe and at low risk of fire even when exposed to moisture and direct water contact.

Accessories

Finally, you should consider what your kit comes with. Some come with only panels, so you’ll need to buy a controller, an inverter and a battery to complete your setup. Some come with a combination of these parts, although batteries and inverters aren’t commonly included. Some panels also include mounting brackets, although this is also uncommon.

Thinking about the additional equipment you’ll need to purchase after buying your panels will help you budget more effectively for your entire system.

How Do Solar Panels Work With Boats?

PV panels for boats work just like panels for residential use — they collect sunlight and route the energy either to a storage or use system.

Since boat solar systems are entirely off-grid, most require the following:

• Solar panels
• A charge controller
• An inverter
• Mounting brackets or other mounting hardware
• A backup battery for energy storage

We’ll explain what each of these components does in the section below, and then we’ll get into how to set up and maintain your system.

Equipment for a Marine Solar System

The main components you’ll absolutely need for your boat solar system are PV panels and a controller. If you plan to store energy or use it to charge common electronics, you’ll also need a battery and an inverter.

The panels are the pieces of the system that collect energy from the sun. The electricity generated is then passed to your controller, which limits the amount of power that flows through the wires to your battery or device.

The charge controller helps prevent overcharging batteries or electronics when production is high, and it also prevents battery drainage when production is low. Some panels are equipped with bypass diodes to provide the same safety features.

The solar energy that’s collected is direct current (DC), while most electronics, including standard light fixtures, use alternating current (AC) power. An inverter is used to convert DC current to AC so that you can use your solar power to power devices directly. If you don’t have DC lights in your boat, for example, an inverter might be necessary to provide lighting.

A battery storage system is exactly what it sounds like: it’s a battery bank that stores solar energy for later use.

Solar batteries are useful for two main reasons on boats.

• First, if you ever experience cloudy days, your solar production might very well drop below what you need to provide power to your devices. In that case, having a battery to pull stored energy from can be helpful in maintaining charging capability or electricity.
• Additionally, a battery on board can be useful for maintaining backup power for emergencies. If your boat’s built-in battery ever fails or you need to charge emergency communication or navigation devices, a battery will come in handy.

Installation

Since you want your solar panels to be exposed to as much sun as possible, it’s best to install them at or near the highest point on your boat — often the bimini. This will prevent them from getting shade from other parts of your boat during the day, regardless of which direction your vessel is moving.

It’s also typically best to install your panels as close to parallel with the surface of the earth as possible. Since your boat will be moving around a lot, it’s not realistic to install them facing the path of the sun in the sky as you would on a home. Laying them flat gives you the best chance of always collecting at least some sunlight.

You, of course, need to consider available space as well, so remember to take measurements of your installation site and compare them to your panels before beginning the process.

Finally, you should consider where your batteries will be — if applicable — and where your wiring will run once your installation is complete. Keeping these things in mind will help ensure that the installation process goes as smoothly as possible.

Below, we’ll include a brief step-by-step guide on how to install a solar system on your boat.

• First, take measurements of where your panels will be installed, the path the wiring will take to all components and where your battery, inverter and controller will be placed. Making sure you have enough room for all of your components will help avoid headaches once you get started.
• We recommend mounting your batteries, inverter and controller first. These are generally the easier components to mount, so they’re the easiest to move once installed.
• Next, mount your panels. The process for this will depend on the panels you choose and where you plan to install them. You should follow the installation instructions for the mounting brackets or hardware you purchase.
• Finally, you can wire your system, beginning with the connection between the panels and the controller and then the connections to the inverter and battery.
• You can test your system by using a voltmeter or by checking to see if your powered devices function as intended. Some controllers will also show you if your panels are providing energy and how much they’re producing.

For more guidance and information on how to set up your boat solar system, you can check out the video below:

Maintenance

Thankfully, solar systems are relatively maintenance-free once installed, although you should carry out routine system checks and cleaning to ensure you continue to enjoy maximum safety and energy production.

You should spray down your panels with water about once every six months to get any accumulation of dirt or salt off of them. This will help maximize energy generation. Around the same time, you should also check the wires and connectors for corrosion, which is more likely to occur if you use your boat in saltwater.

After major storms, it’s a good idea to ensure that none of the connections between components were lost. A simple disconnect could lead to your battery charging issues, which could be an issue if you ever need backup power.

Lastly, it’s worth mentioning that solar systems on boats are generally considered safe. There is a small risk of fire but provided you carry out the proper maintenance, you should avoid any serious issues.

Are Marine Solar Panels Worth It?

The answer to this question really depends on who you ask. For some boat owners, PV panels are essential. Not only can they provide backup power for emergencies, but they can also improve your quality of life at sea and the enjoyment of your boat.

For many people, these things are indispensable, so solar systems are well worth the investment. For certain types of boats — like small fishing boats and sailboats — solar panels will be the only source of electricity.

Other boat owners feel comfortable relying on generators if they have them, and some use their boats only for short durations, which makes having an on-board solar array less valuable.

For most people, though, having at least a small solar system to provide backup power for emergencies is worthwhile. From there, opting to up the size of your system to improve your time at sea isn’t hard to get behind.

FAQ: Marine Solar Panels

Below, we’ll answer a few of the most common questions we get about solar panel systems made for boats.

What are the best marine solar panels?

In our opinion, the best solar panels for boat use are the SunPower 170W solar panels. These are flexible panels that allow for easy and versatile installation.

They are some of the most efficient panels suitable for boat use, and they provide an incredible 170 watts each. This is enough power for just about anything you need electricity for on your boat and for emergency equipment in low-light conditions.

These panels are a bit expensive, and they don’t come with any additional equipment. However, the junction boxes have a waterproof rating of IP67, come with a five-year warranty for equipment and high efficiency and are made from high-quality, durable materials for years of use.

Will solar panels keep my boat battery charged?

Yes, solar panels can be hooked up to keep your boat’s 12 volt battery charged. However, you need to make sure you install a system that is sized appropriately for your boat’s needs.

You can check how much power your boat draws from its battery system by looking at the loads (in amps or watts) of each device. You can also use your battery monitor if you have one to check the energy demand of each individual component pulling power. Then, choose solar panels that produce a bit more energy than your system needs.

If you live in an area that experiences a lot of cloudy weather, you might want to size up your system even more to ensure your system generates enough electricity.

How much does it cost to put solar panels on a boat?

The cost to install a solar array on your boat can range from around $150 up to well over $1,000. Where in this range your total falls depends primarily on how much energy you need to produce.

If you’re looking for portable solar panels to take on and off a small boat with you for emergency use only — which is typical for sailboats and smaller boats that don’t normally have electricity — you’ll likely be looking at the $150 end of the spectrum.

If you have a much larger boat and want to be able to maintain power for your essential equipment and some non-essentials, then you’ll likely push your all-in cost closer to the higher end of the range.

What are the benefits of solar panels on boats?

Installing solar panels on your boat can provide quite a few key benefits, although the perks you’ll actually experience depend on your situation and your specific boat.

Perhaps most importantly, solar panels can charge your boat’s battery and maintain electricity for emergencies. Most systems — even small ones — can serve to charge your phone, GPS or other emergency devices in case you run into problems out on the water.

Larger systems can also provide power for recreational use, like charging phones, powering speaker systems, keeping beer cold and more.

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Updated 1 month ago

Everything you need to know about installing solar panels on boats

Written by Ana Almerini

Find out what solar panels cost in your area

Solar panels built specifically for use on boats are a great option as a source of backup power when you’re out on the water. Solar panels act as a way to recharge the boat's batteries and keep your appliances running, all without needing to buy gas for a noisy gas-powered generator.  

Marine solar panels are a relatively niche market, but there are plenty of options to choose from since typically, you can install any DIY off-grid solar panel on your boat. 

Our favorite solar panels for boats are:

Topsolar flexible solar panel

Renogy 100W 12V solar panel

SunPower 170W solar panel

Below, we get into the best solar panels to buy for your boat depending on your needs, how to determine which size you will need, and why utilizing solar power for your boat is a smart idea.

Key takeaways

Solar panels on your boat maintain your battery’s charge to ensure that your appliances always have power, without a loud and expensive gas generator.

An average 30-foot boat will need about 350 watts of solar power to maintain electricity.

To determine how many panels your boat needs, you need to figure out how much power it uses, which you can easily do with a battery monitor. It also depends on how big your boat’s battery is.

You can install solar panels in unique locations on your boat but it is important that they can track the sun’s movement throughout the day.

What is the best use for boat solar panels?

Boats use a lot of energy for things like maintaining autopilot, keeping navigation lights on, and powering radio systems. Solar panels can provide the energy to carry out these tasks and maintain your boat's battery if it happens to be sitting idle. In either circumstance, your battery will never run out of energy. 

Not to mention, compared to gas-powered generators, solar panels have the added benefit of being quiet. They also don’t produce excess heat that makes sitting in your boat with a gas generator unpleasant on hot days.

You can use solar panels for any size boat. For smaller sailboats, the main job of your solar panels would be to keep the battery fully charged for your boat’s electricity. For larger boats, they help reduce or eliminate the need to use the engine to provide excess power. 

The average 30-foot boat would require about 300-350 watts of power . Depending on your energy use and boat size, you need more or less solar power to provide you with electricity.  

How to choose the right solar panels for your boat

The first step to determining what size solar panel will work for your boat is figuring out how much power your boat is using . You can do this by checking the labels on your appliances for the typical amp hours and volts used.

Or, you can use a battery monitor to measure the amount of energy your fridge, lights, or the other appliances on your boat consume while in use. After finding the amp hours your boat uses per day, you can determine the wattage of power your solar panels need to produce. 

This example is extremely limited, you will need to determine how much energy your entire boat is using to make sure your panels provide enough power to keep your battery charged. But, technically if you had one 300-watt solar panel, or (3) 100W solar panels, they would generate 2,800W over those 8 hours. That energy would be more than enough to keep the above appliances running. 

The size of your boat’s battery will also factor into which size solar panel you need . For instance, many DIY solar panels are meant to act as a battery charger to a 12-volt lithium battery, which is the typical size within a boat. But if you have a larger boat with a larger battery, you might need more than 350 watts of power. 

Additional things to consider are whether you will need a charge controller and if you have enough unshaded space for your solar panels to absorb the maximum amount of sunlight. 

Do you need a charge controller? 

A charge controller acts as a regulator for the amount of energy that is transferred from your solar panel into your boat’s battery. This helps to make sure that your battery is not overloaded and overcharged, which can ruin the battery over time. 

While it is not necessary, it is a good idea to install a charge controller with your solar panel system to help manage the energy load that your battery receives. This will prolong the life of your battery while ensuring your boat uses the exact amount of energy it needs. 

Do you have enough space for boat solar panels?

Having a dedicated spot on your boat that has access to the full sun is key. Any shading, such as from a sail on your boat, will reduce the amount of energy your panels produce. While simply bringing portable solar panels aboard is an option, permanently mounting the panels to your boat makes it easier to always have your panels ready to go. 

Because boats typically only have room for a small solar system, getting the most out of your limited space is key. With limited space, it’s best to look for high efficiency panels because you will need less of them to produce the energy you need.

Learn more : What are the most efficient solar panels in 2022?

Or something as simple as the setup below can power your boat's battery and be angled towards direct sunlight throughout the day while not taking up valuable space on the boat.  

What are the best solar panels for boats to buy?

Any type of panel can be used on a boat such as monocrystalline, polycrystalline or thin-film. However, it is important to note that some companies exclude salt water and marine environments from their warranties. 

We've listed some options below, you can choose based on where you have space to put the panels. For instance, thin-film panels are less efficient but they are flexible. So if you wanted to place a few panels on your boat’s roof versus one panel taking up valuable space, thin-film panels would be a good choice. 

On the other hand, monocrystalline and polycrystalline panels have higher efficiency ratings and will ensure you get the most energy from your limited space or during low-light conditions. So if you have a location that can support racking, monocrystalline or polycrystalline solar panels are a better option. 

Below are some of our top picks for solar panels for boats:

Most practical 

Topsolar flexible solar panel 

Cost : $149.99 Buy Now

The Topsolar 100W flexible solar panel is a practical, semi-flexible, cheap option. It does not come with a charge controller or an inverter but you can buy a few of these to create a simple solar panel system on your boat.  

This flexible panel also allows you to utilize more space since this can be molded to fit untraditional angels on your boat. 

Best quality, small cost 

Renogy 100W 12V solar panel 

Cost : $103.44 Buy Now

The Renogy 100W 12V solar panel is a great option. At 21%, it is a high efficiency monocrystalline panel manufactured by a reputable solar panel company.

There are pre-drilled holes for easy drilling to a mount on your boat. If you have space to secure solar panels to a mount, the Renogy panels will help you maximize energy output.

Best overall 

Cost : $399.00 Buy Now

The SunPower 170W panel is a great flexible solar panel for off-grid use. Choose this option if you are interested in the versatility that a flexible solar panel offers and also want a reputable brand name with a high efficiency rating. 

While these panels do not come with a solar charge controller, they must be used with one, so add one to your cart like the Victron Energy SmartSolar MPPT charge controller . 

Why solar panels are a good choice for backup power on boats

Having a source of backup power on a boat is very important, you do not want to be caught far from land with a dead battery. Solar energy is the perfect choice because on a typical boating day, there is ample sunlight available as renewable energy. Because boats rely on a battery for electricity, a solar panel can ensure that this battery always has power. 

There are many solar panel options available for your boat and can easily be installed DIY. They will help with your sense of security while saving money because you can skip out on the traditional gas generator and rely on a self-sufficient solar power system. 

Ana is the Marketing & Communications Manager at SolarReviews, working within the solar industry since 2020. With a Master's in Climate and Society and professional experience in marketing, she helps communicate the value of solar to homeowners and build awareness of the SolarReviews brand. On weekends you can find her at the Jersey shore, reading a book from the ever-increasing stack on her side table, or eating food someone else cooked....

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9 Best Marine Solar Panels for Boats – (Reviews & Guide 2021)

Producing green energy doesn’t have to be something we do on the land-only. One of the most essential parts of your watercraft is the best marine solar panels. With it, you get to power your appliances on board and maybe even get hot water. The best part is that the environment isn’t harmed by this energy production.

But choosing the right solar panel for your watercraft can be very difficult because there are so many questions about the purchase.

What actually is a marine solar panel? Is it necessary to have one? How to choose the most appropriate unit? Is the installation hard? Can you take proper care of the panel?

The answers to all these questions are simple, and here we are going to discuss everything you need to know – some vital information, tips, and even marine solar panels reviews – so you can make the right decision for your boat.

Best Marine Solar Panels Comparison Chart

Best marine solar panels reviews (editor’s picks).

These are some of the most popular products, you may find on the market. Each one of the products has some advantages, but also some disadvantages. Our team has collected these products and their features, so you can take your decisions, which you want to buy. Keep in mind, that they are not arranged in a specific way.

1. Renogy Monocrystalline Solar Starter

The package includes mounting brackets, adaptor kits, cables and of course the solar panel. The dimensions are 47×1.5×20.9,” and the shipping weight is 25.9 pounds.

Like every other product, this one has pros and cons. Let’s take a quick look at them.

• Good quality
• Good wattage
• It can be used to power more things at ones.
• Super durable – the quality of the material is high-class, and the panels cannot be damaged easily.
• The quality of the charge controller can be better.
• Low-grade cables

2. Battery Tender Solar Maintainer with Built-in Super Smart Charging Controller

Of course, the solar panel has some advantages and disadvantages. You need to know all of them, so here is a shortlist.

• The temperature sensor is built-in.
• Good quality of materials. The panel works well for a long time.
• Easy installation and maintenance.
• When it is turned off, the battery drains fast.
• When part of the panel is in shadows, it does not work fine.
• A short life of the battery.

3. HQST Monocrystalline Solar Panel for Boat (Compact Design)

Here we are going to face you with some benefits and drawbacks of this solar panel.

• Even in a shaded area, the panels produce enough power.
• Excellent performance of the system.
• The panel handles the winds very well.
• Complicated installation
• Cables are not included.

4. ECO-WORTHY Solar Panel for Boat with Alligator Clip Adapter

Pre-drilled holes on the backside of the panel allow quick mounting and securing. It also has a blocking diode, used to prevent discharge. The panel can charge 12V batteries, and the maintenance is almost none. The size is essential – it is not small and not significant at the same time – 8.7×13.9″.

• Easy to install
• Easy to maintain
• Very light, it weighs only 1.50 pounds
• Controller and cables not included.
• The voltage is low, and the panel could not be used for charging big things.

5. WindyNation Solar Panel Kit

The LCD Screen shows you essential information like amperage, voltage, etc. This one is very suitable with bigger boats, its dimensions are 40×1.4×26.4″ – so it is big enough and you must have enough space for it. The shipping weight is 10.86 pounds.

• High voltage
• Instruction for installation
• Excellent performance of the controller and battery.
• Hard installation.
• No fuses included.
• Bad quality of cables.

6. ACOPOWER Mono Solar Panel for 12V Battery Charging

Except for its usage on your boat, after the sailing season, you can also use it for a caravan, RVs, cars, boats, a greenhouse. Other ways of usage are such as a set of a solar system, solar light, solar pump, etc. The aluminum frame and anti-reflection glass give the solar system a longer life. This item also has a waterproof display. It is medium size – only 11.5×11.5×0.9″ – and the shipping weight is 6.5 pounds.

One quick look at the benefits and drawbacks of using this particular item:

• Straightforward installation
• Resists on bad weather
• Excellent quality of the battery and the controller
• If part of the panels is in shadow, the performance is bad
• Cables are not long enough

7. Renogy Extremely Flexible Monocrystalline Solar Panel

This product is excellent, but it has not only many advantages, but also some disadvantages. Let’s take a quick look at them:

• Very flexible
• Very light and easy to transport
• Very easy to install
• Excellent performance on overcast days.
• Grommets are not included.
• If there are some clouds, the performance is terrible.
• Cables are not included too.

8. Newpowa Poly Solar Panel Module

The product may have high performance, and everything sounds great, but it also has some drawbacks. So here you can check some of them.

• It is very light
• Easy installation
• The product has a warranty
• Cables and controller not included.
• It doesn’t have top performance in winter and in adverse weather conditions.

9. Richsolar Black Off-Grid Portable Monocrystalline Solar Panel

As you already read, this particular product has some advantages, but also some disadvantages.

• Excellent performance in shadow and lousy weather
• Solid electrical output
• Not so portable

What Are Marine Solar Panels?

One of the main problems of people who live on boats except finding excellent boat equipment is the extraction and consumption of electricity and fresh water. 99% of the cruise ships nowadays have solar panels and wind generators, but in 99% of cases, they are not enough to cover their electricity consumption and have to burn the motors or generators if not every day, then every day.

In other words, the marine solar panel is just a solar panel that collects energy from the sun and uses it to power the boat in many ways. The most popular use of this type and the Sunpower marine solar panels is to recharge the batteries in the boat, but it can be used to power the electrical system of the sailboat.

Types Of Panels

Flexible Marine Solar Panels

Extremely comfortable, they are designed to be curved or bent, so they can fit any surface and most importantly your specific needs. They are perfect for small boats, where you have cramped space. This type of panels is easy to install because it is light and does not have the metal back. If you choose this type pick one of the best flexible solar panels for your needs, don’t buy a cheap product, that provides poor quality.

Standard Marine Solar Panels

They have an aluminum back, just like the other solar panels. They handle the rain and other adverse weather conditions perfectly. But they are also cumbersome and not flexible at all, so these panels are recommended if you have more space on your boat.

All marine solar panels can be divided into four other categories, according to the type of technology used.

Monocrystalline

Have the highest efficiency in direct sunshine, but also produce the most complicated process of silicon monocrystals. The oldest one. A group of a single cell is collected together and formed a single solar panel. The panel is small, uses less space.

Multicrystalline

Their efficiency is 1-2% lower than that of Monocrystalline panels, their production costs are also slightly smaller because not so pure silicon is used as in Monocrystalline. Made from single wafer slices of silicon crystals. It has a lower efficiency than the previous type but is cheaper.

This production process is, and therefore these are the cheapest solar panels. On the other hand, they have almost twice the efficiency of the crystalline panels. Just put – for the same installed power you will need twice as many panels. Less efficient than the Multicrystalline and the Monocrystalline, that is why the panels are more significant, can handle the hot and sunny day better than other types. This one has ‘shadow protection’ and can produce energy, while part of the cells is in shadow.

Amorphous Silicon

The cheapest type. It is made of crystal silicon material on a glass, steel or plastic sheet. It is almost the same as the Thin Film, has the same protections, but is cheaper to produce.

Benefits Of Using Marine Solar Panels

• If the panels are attached to the electrical system of the boat, it will save you a lot of fuel. And since we mentioned fuel, the portable marine fuel tanks for small boats are handy, and they are an essential part of your sailing boat set. Without electricity and fuel, what are you going to do in the water?
• They are environmental-friendly. The panels use renewable energy, which is very important, because we all live on the same planet, and yes! We care for the Earth.
• It is very easy to maintaining and can save you in dangerous situations, if the engine break-down and leaves you with no power, the solar panel can save you.
• Panels will save you time and energy.
• You can use them to power small things on board.

Like everything else, marine solar panels have some disadvantages, and here you can take a look at them.

• Solar panels take up space. Sometimes you do not have enough space on your boat, and solar panels are not a good idea.
• Energy storage is expensive.
• Sunlight availability. If there is no sun, there is no energy too.
• The whole solar panel system is expensive.

When you decide to buy something, it is essential to look for particular functions. Our team has done some research, and here we have collected the most critical information.

• Size – The size matters. Check the dimensions of the panel carefully – if it will fit your boat and your needs.
• Wattage – Check how much energy you need. When you have the idea of how much power you need, check the wattage of the solar system.
• Batteries and storage – Some types of solar panels can store energy. This is a perfect feature for rainy days.

Installation

Installation of the marine solar panel , just as the installation of the outboard motor can be hard. Our most important tip is to check the manual of the manufacturer. But here are some more tips for easier installation.

• All parts of the solar systems must be waterproof.
• Choose the right place on the boat to install the panel.
• Be careful with the wires. The boat’s configuration will define where the cables will go.
• Check the type of the panel – with zips, with Velcro, with glue or with frame.
• Always follow the instruction for installation.

Maintenance

A new technology to fix this is the self-cleaning nano-hydrophobic material that covers the panel and maintains its high efficiency over long periods. The cover the panel is sturdy as it actually involves covalent bonding which goes to the top side of the panel that faces the Sun. This is an excellent advantage over-spraying coatings, whose characteristics worsen over time.

The principle of this coating creates a barrier that stops water from penetrating the body of the panel or to even stick to the surface. This explains also why all panels are tilted. It’s so that water can drip down freely without staying on the surface of the unit.

This means that when the treated surface is tilted, the water spheres are rolled out of the surface. Taking care of all your stuff is essential. Your marine solar panel is not an exception.  Now we can discuss how to maintain it.

• Check the manual for instruction.
• Use some warm water and mild detergent.
• Microfiber rug will help you to remove dust.
• Always make sure that the system is completely dry.
• Always check if the wires are dry.
• Check all electrical parts to be sure everything is okay.

Safety Tips

In the final, our team has prepared some tips for your safety. Do not forget that security is paramount.

• Do not forget to check the system frequently.
• If you have some doubts, call a technician. They will help you.
• All wires must be dry.
• If not install correctly, the system will not work right.
• Not cleaning the panels will cause a lack of sunlight and energy.
• If you do not choose the right place for the panels, the boat can lose its balance.

Well done, you guys, you have successfully finished our buying guide on finding the best marine solar panels . Having read our reviews on the classiest marine solar panels and our additional information and tips, you now realize that finding a reliable product can be a bit hard. It is necessary to have the right pump for your boat, do not forget the maintenance and always follow the manual and the safety tips, so you can enjoy your boat and your trip in the water.

If you find our guide useful, forward it to your sailing-loving friends. Also, do not hesitate to contact us – your opinion is important! Comment, sent us an email – tell us what you think!

We hope that you find this text interesting. Find some more free time and check our articles – you can find information about all the marine supplies you need.

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• Articles and Guides

The Best Solar Panels for Boats, Top Brands on the Market

29th jan 2024 by denelle balach.

Energy generated by solar systems converting sunlight into energy for electrical needs has made dramatic gains worldwide in the last 15 years. However, until relatively recently, solar panels that could withstand the harsh marine environment were just a dream. 

Fortunately, a new reality has emerged. The boating community can now choose from numerous solar brands that fit any person’s boat, budget, and power needs without skimping on safety, durability, and efficiency. Solar panels are a clean, renewable source of power that will reduce or eliminate the need for fossil fuels aboard your boat, potentially saving on fuel costs in the process, but that’s just one benefit.

Solar doesn’t produce greenhouse gas emissions, resulting in less pollution and a reduced carbon footprint from your boat. Solar panels operate silently, providing a quieter and more peaceful boating experience. They offer freedom from shore power and generators so you can stay on the water longer before needing to turn on your engine or return to shore to recharge your batteries. Solar panels are generally low maintenance and are regarded as a reliable, hassle-free power source. 

They are long-lasting especially when classified at an IP67 (ingress protection) rating.  This ensures they are protected from water corrosion. They are versatile in size and configuration and can be installed on most boat sizes and types. Some great mounting options include on the deck, atop a cabintop, bimini or arch, or even integrated into the sails of a sailboat. 

However, choosing the right solar panels for your boat can be confusing, and with significant upfront costs, it’s understandable that you want your first solar panel purchase to be a good one!

Below are some of the top marine solar brands that you can depend on for efficiency, durability, and affordability, as well as some things to consider before purchasing any solar panel(s). 

Best Premium Solar Panels

Now owned by Maxeon, SunPower has consistently dominated the residential solar panel market, so it’s no surprise many boaters consider them an excellent option for their vessels. SunPower is a premium solar brand with the highest power output and charging capacity in its product class. This means more power in less space! SunPower is made from lightweight polymer materials within their flexible and fixed-frame options. 

SunPower has a robust 25-year warranty, claiming specific modules will be at least 80 to 92 percent of the minimum peak power rating after 25 years. SunPower’s commitment to innovation and cutting-edge technology makes their solar panels an excellent choice for any boat’s size and power needs, as they have many sizes, wattages, and types of solar panels. 

SunPower panels are usually more expensive than other solar panels on the market. However, their panels are highly durable and efficient. The other challenge for some consumers is that SunPower does not sell directly to marine consumers from their website. To purchase one of their panels, you must contact a dealer such as Sun Powered Yachts or purchase a panel from Amazon. Sun Power’s official customer service is only trained in residential and commercial solar systems, so they cannot answer marine-specific questions. Sun Powered Yachts Website

Sunpower SPR-E-Flex-100. Sunpower photo.

Solbian is a premium solar brand specializing in flexible and semi-flexible solar panels. They guarantee the quality of the product and its duration in time. Most of their panels use SunPower’s technology to make their cells. Solbian’s panels are durable, thin (less than 2mm), and have flexible, curved surfaces, perfect for any boat deck. Their panels are lightweight, about 2.5 kg per square meter, compared to the average 12 kg in traditional panels. Solbian’s solar cells are remarkably efficient as they are manufactured in the SP series, which can give out high power in tiny dimensions.

Solbian modifies the number of cells, color, shape, and electrical characteristics to get your panels exactly how you want them. They are easy to install, both permanent and removable, and are often mounted via a structured adhesive, making installation easy. These are more expensive than other flexible and semi-flexible solar panels, but considering their efficiency and longevity, these panels will provide a good return on your investment in the long run. 

Another problem buyers face is purchasing knock-off Solbian panels from scam manufacturers. You’ll know this is the case when your panel says they are an “A” grade panel. Solbian and SunPower don’t use industry grades! These vendors may also use a variation of SunPower’s or Solbian’s name, like “Solbien,” to scam people. Solbian’s Official Website

Solbian SP Series. Solbian photo. 

Best Overall Solar Panels 

Renogy provides a wide range of solar panels suitable for various boat applications. The brand has established a reputation for its durable, efficient panels offered at a lower price than competitors like SunPower. With numerous options available, Renogy allows you to choose the ideal size and type of solar panel tailored to your boat’s needs.

The company offers plenty of resources and videos to aid in selecting the best panels and facilities for easy DIY installations, often requiring no drilling holes. Their panel options come in flexible and fixed-frame shapes, available in various sizes and wattages. However, while these are competitively priced, they are slightly less efficient than premium alternatives like SunPower, potentially necessitating the purchase of more or larger panels for equivalent energy capture.

Some reviews also indicate that due to Renogy’s rapid scaling, they have had challenges in maintaining strong customer service. This could result in poor user experience or issues with warranty returns. Renogy Official Website

Renogy 100W 12V General Off-Grid Solar Kit. Renogy photo.  

GoPower! is another excellent brand offering solar panels specializing in flexible panels. Their aerodynamic, durable, and lightweight panels feature a low profile while ensuring high efficiency through monocrystalline cells. These panels easily conform to almost any surface without compromising power output.

All GoPower! panels feature an impermeable lamination coat, facilitating and flexing against curved surfaces without requiring custom mounts. The installation options include adhesion or screws, both claimed to be straightforward and secure.

Each panel has a five-year warranty and is reasonably priced, making them a top choice. However, other options might be preferred if you’re not looking for flexible panels. Additionally, their warranty is shorter than brands like Renogy, and there is a lack of online information regarding potential panel issues.  GoPower! Official Website

110 Watt Go-Power Flexible Solar Kit. GoPower! photo.

Best Budget-Friendly Marine Solar Panels

NewPowa offers monocrystalline solar panels, ideal for off-grid boating. These panels feature heavy-duty anodized frames with pre-drilled holes for mounting and a durable TPT back sheet that dissipates heat, ensuring better performance and lifespan. 

NewPowa guarantees at least 80 percent maximum output within 25 years because of its high transparency due to low-iron tempered glass. Available in various dimensions and wattages, their panels cater to different needs and budgets, offering rigid and flexible options!

While NewPowa panels are among the most affordable options on the market, they are also less efficient. However, they suit small to medium-sized systems well, maximizing budget and efficiency. Some reviews suggest issues with their customer service, so consider this aspect when making your choice. NewPowa Official Website

100W Monocrystalline 12V Newpowa Solar Panel. Newpowa photo.

After 15 years of development, Eco-Worthy has become a leading provider of independent off-grid solar solutions. Rated highly for their highly efficient, budget-friendly panels, Eco-Worthy panels feature vermiculite tempered glass and an aluminum frame, ensuring durability and protection against water and saltwater corrosion. 

These panels guarantee to deliver over 80 percent of their initial power after up to 25 years of use, withstanding high wind and snow loads. Easy installation using the pre-drill hole method adds to their appeal. 

However, Eco-Worthy panels lack flexibility like Solbian panels, challenging placement on curved surfaces. Marketed primarily toward sailboats and yachts, Eco-Worthy panels may not suit other types of vessels. If these limitations present no obstacle for you, their durability and reasonable pricing ensure a good return on investment. Eco-Worthy’s Official Website

100W 12V Monocrystalline Eco-Worthy Solar Panel. Eco-Worthy photo. 

Best Backup Solar Panels 

For those seeking backup solar panels for emergency use, HQST offers a suitable solution. Ideal for powering lighting and navigation systems during outages, HQST provides portable solar panels that require no permanent installation.

These durable and efficient panels boast improved wiring design, ensuring at least 50 percent power production even when shaded; connecting them to a rechargeable portable power station or using the built-in USB ports to charge mobile devices is straightforward. 

Their lack of permanent installation does mean setting up and dismantling after each use. Despite being less efficient than other panels and not as durable as premium options, HQST panels serve well in emergencies. HQST Official Website

100 Watt 9BB Portable HQST Solar Panel. HQST photo.

Lensun Solar

Lensun Solar presents various foldable options suitable for emergency equipment. Their foldable solar panels, equipped with adapters compatible with most solar power station generators, feature high-quality A-grade PERC 9BB monocrystalline solar cells. 

Lightweight, flexible, and boasting a higher efficiency of 23.5 percent, these panels are waterproof and capable of withstanding extreme temperatures. The kickstand design enhances solar energy absorption, making setup, carrying, and storage easy. 

While they lack permanent installation like HQST, Lensun Solar’s portable panels serve well for charging phones and devices during emergencies or short trips. However, reviews suggest their flexible panels have a limited lifespan and may not last forever on a highly curved surfaces like a Bimini. Lensun Solar Official Website

Lensun 200W 12V Foldable Lensun Solar Panel for GoalZero. Lensun Solar photo.

8 Points to Consider Before Buying Marine Solar Panels

Purchasing a solar system for your boat requires research and planning, considering power needs, budget, and configuration. While learning may take time, the information is readily available. Here are key considerations before buying solar panels from the mentioned brands or any other brand: 

Power output

Begin by identifying the amount of energy needed. Create a list of every electrical system, appliance, or other device you want to power using solar energy, such as your cooler fridge, phone, kindle, etc. Calculate the energy requirement for each device by converting the current into amperes and multiplying it by the daily usage time. 

Add up these ampere-hour totals for all electronics to get the total energy consumption in ampere-hours. Estimate the average sunlight hours per day in your vessel’s location. Then divide the daily energy consumption (in ampere-hours) by the average sunlight hours to determine the daily energy requirements in watts.  

Space available for installation

Boats come in various sizes and shapes, requiring measurement of available dimensions and locations for panel placement. Considerations for proper fit, secure attachment, sun exposure, and aesthetic appeal should guide your selection. 

Calculate the number of panels needed by dividing the required solar panel capacity by the individual panel wattage, ensuring it doesn’t exceed the allocated dimensions and weight limit. 

Durability and waterproof rating

Before purchasing, ensure the panels are waterproof with an Ingress Protection (IP) rating of IP67 or higher. This safeguards the panels from water and dust: protective encapsulation layers and materials like ethylene vinyl acetate or tetrafluoroethylene shield solar cells and electronics from moisture. Verify proper sealing mechanisms for mounting equipment to prevent water ingress. 

Establish a budget for solar panels, considering the balance between cost and quality. Cheaper panels may save money initially but could compromise long-term efficiency and durability. Compare prices, system components, warranties, and services offered. Consider the return on investment, evaluating potential savings on batteries or shore power over time. 

Renogy 350 Watt Solar Flexible Kit on flybridge Bimini. Renogy photo.

Brand reputation

Check for good brand ratings and customer satisfaction as indicators of a reliable purchase. Ensure satisfaction with the warranty, recognizing that while durable, solar panels are not invincible. 

Type of solar panel

Select a panel type based on location needs. Rigid panels are durable and efficient but heavier, while flexible and semi-flexible options offer versatility. Portable panels are easy and ideal for small electronic devices. 

Accessories

Consider additional accessories like charge controllers, inverters, mounting brackets, hardware, and batteries. Some brands may require specific accessories. Solar kits can simplify the process.

Installation

Decide on the installation approach based on your system size. Hiring an installer may save time, while a DIY approach can save money but requires more research and execution time. 

Solar can be a valuable addition to most boats. While it requires research and investment, the long-term benefits, including enhanced life at sea, often make it worthwhile. We look forward to witnessing advancements in the solar energy industry. Your solar journey is an exciting endeavor that, with careful consideration, can significantly improve your boating experience.

Written By: Denelle Balach

Denelle Balach is a lifelong boat enthusiast who has spent her days at Lake Erie on kayaks, speedboats, and anything in between. She channels her passion for boating and writing into concise, engaging content for boating and yachting publications and maritime agencies. She can be reached through her website:  www.denelle-balach.com .

More from: Denelle Balach

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• Solar on the go

Picking the best solar panels for a sailboat: Buyer’s guide

• 18 Aug 2022

You might have already heard of brave sailors that conquer the oceans with nothing but wits and solar panels. For instance, this year 83-year-old Kenichi Horie became the oldest person to sail solo from the US to Japan on a solar-powered boat. These stories are inspiring, but picking panels for your boat yourself can be a small challenge in itself. That’s why we wrote a short article about the best solar panels for sailboats and how to recognize them.

Start from type of solar panels

When it comes to solar panels for sailboats, their weight and size matters more than with PV modules for residential systems. Efficiency is important but power — not that much, because the energy needs of a boat are relatively low. The first thing you’ll have to decide about your panels is their type.

Generally, you’ll choose between thin-film panels and monocrystalline modules. While polycrystalline panels are still around and they are indeed cheaper than mono panels, they are much less efficient, which means they’ll need more space and add more weight to your boat.

Thin-film panels are light and cheap

Thin-film or flexible solar panels bend well and they are very easy to install which makes them a great choice for boats with difficult configurations. Some sailors say that flexible panels are the best choice for fast boats because they don’t impact the aerodynamics of a vessel as much as rigid panels do.

The downside of flexible panels is their low wattage. If there are many appliances on board, you’ll need several panels and you’ll need to find the right place for each of them. They also age faster than rigid panels — a thin-film panel generally lasts for 10-15 years.

Monocrystalline panels are powerful and reliable

Rigid solar modules, monocrystalline and polycrystalline, are heavier and bulkier than thin-film panels. You can fix flexible panels with adhesives, but rigid panels require drilling. They are also more expensive than flexible panels. 

On the other hand, monocrystalline panels are the most efficient type of panels which means that they provide more power for less space. Even one powerful mono panel can be enough for everything that you’ve got on board. They are also much more reliable and will survive any storm that is coming your way. A monocrystalline panel lasts for at least 25 years.

Panels for boat should be efficient and sturdy

The best solar panels for sailboats don’t have to be powerful, but they better be efficient — find the number in the datasheet. For rigid panels anything over 18-19% is fine. Panels also should be sturdy enough to withstand seastorms. You generally also want good shading tolerance since panels often get shaded by masts and sails. Finally, good performance in low-light conditions is appreciated.

Picking bifacial panels, 72/144-cell panels or larger, anything too powerful generally doesn't make a lot of sense. Performance at high temperatures matters less than it does with home systems. Warranties also play a lesser role. You won’t be able to make use of them because they generally have effect only for residential installations.

The markets of thin-film and rigid panels are different. Generally, a manufacturer of flexible panels doesn’t offer mono- or poly-panels. Canadian Solar, Q CELLS and Jinko Solar are good choices when it comes to monocrystalline modules for boats. Renogy , WindyNation and PowerFilm make fine thin-film panels.

Do the math before purchase

The amount of power for your boat depends on the number of appliances on your board. There are two main ways to determine the size of installation that you need. You can take a test trip and see how much of your battery’s charge you’ve spent in one day. You can also do the calculations manually: write down all the appliances on the board with their power rating and number of hours in use per day. You can read about it in detail in our article " How much solar power to sail the seas? " It doesn’t make sense to oversize a marine PV system, because all the excess power will just go to waste.

Keep in mind that adding photovoltaics doesn’t make your vessel a solar boat, unless you have a solar-powered motor. You can switch your boat to solar energy fully, especially if it’s small, but you’ll have to calculate your energy needs accordingly.

Once you’ve purchased your panels, you’ll have to install them properly. You can order professional service or do it yourself. The most popular places for solar panels on a boat are a stern rail, masts, deck and canvas. Thin-film panels can even go on the sails. Ideally, you want a place where panels wouldn’t be shaded by masts on any other parts of a boat.

List of solar panels for a sailboat

We’ve asked our engineer to pick the panels that would complement a small boat well. These are his choices:

ZNShine Solar ZXM6-NH120-370/M

Solar panels from ZNShine Solar are inexpensive and fit all kinds of applications, including boat systems. ZXM6-NH120-370/M provides 370 Watts of power with a 19.88% efficiency. It performs well in low-light conditions. Graphene coating increases power generation and allows self-cleaning. The only downside is a lower wind tolerance, compared to other models: it is rated to withstand 2400 Pa pressure which is comparable to 140 mph wind.

Mission Solar MSE345SX5T

MSE 345 is a simple solar panel for all kinds of applications, including boat installations. Mission Solar panels are manufactured in Texas. The module provides 345 Watts of power with 18.7% efficiency. It is certified for high snow (5400 Pa) and wind loads (4000 Pa). The model is resistant to salt mist corrosion.

Suntech STP 365 S

Suntech is a Chinese company that offers quality budget-friendly solar panels. The STP365S model stands out in line because of its great performance in weak light, such as cloudy weather and mornings. It is designed to withstand harsh weather conditions, and the module is certified to tolerate wind of over 170 mph. Half-cut design makes cells sturdier and improves shading tolerance. Overall, this panel earns a place among the best boat solar panels.

Andrey had been a news editor and freelance writer for a number of medias before joining A1SolarStore team. Climate change and its impact on people's lives has always been among his interests and it partially explains his degree in Philosophy and Ethics.

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The Best Marine Solar Panels of 2024

Recharge batteries and power up marine electronics by using the sun’s energy..

Shining a Light on the 8 Best Marine Solar Panels

The late great Lou Reed once sang that electricity came from other planets. And he wasn't far wrong, as electricity comes from the sun by the magic of solar power .

The best marine solar panels for boats free you to travel the seas, safe in the knowledge that as long as the sun shines, there's an endless supply of energy. I speak from experience, having fitted 600 watts of solar panels to my canal barge .

It means that for almost eight or nine months of the year, barring really overcast days, I can get all the power I need to liveaboard without the need to run my engine. The ocean is one place where you can guarantee no obstructions from the sun, so it's no wonder that solar power is a top energy choice for sailors.

Why Get Solar Panels?

In the world are two types of boaters: the liveaboard boater and the weekend or holiday leisure boater. Both will benefit from solar but in different ways.

The energy requirements for a liveaboard boater are vastly different from a leisure boater. Managing daily energy consumption is a skill, and having solar means that you worry a little bit less about your batteries .

For a liveaboard boat, the best marine solar panels will be more substantial, probably a minimum of 100 watts. Most liveaboard boats run with two or three panels , giving them a maximum of 300 watts .

That's more than enough power to run a fridge, onboard equipment and laptops while in the middle of the ocean.

For leisure boaters, their energy requirements are far less crucial. Sure, they want the same benefits, primarily, but there's no demand for constant solar because the vessel gets used on an ad-hoc basis. 

It means that there's less need to fill the roof of the boat with masses of panels, unlike the liveaboard vessel.

Care and Maintenance

Solar panels are as easy to clean as your windows. Simply use a hose  and nozzle to rinse away dirt and grime and then wipe with a squeegee . If there's a buildup of debris, use a soft scrub brush and a cleanser such as boat soap  to gently scrub.

Featured Boat Care Product

Check Price on Amazon - Better Boat's chamois towel is scratch and lift-free as well as durable, soft and absorbent. It's the perfect way to keep your boat, RV or car clean, dry and shiny. 

Different Types of Marine Solar Panels

Okay, so you've thought long and hard and have reached the momentous decision to get solar panels. But what are your options? Let's review your solar power choices for boats.

Flexible Solar Panels

Flexible panels are great because they adapt to whatever surface you wish to attach them. They flex, which means you can attach them to surfaces that are not perfectly smooth or flat.

Given the unusual shapes and angles you find on ocean-going boats, this is an advantage.

Also, these types of panels are more robust, meaning they should easily stand up to the rigors of daily sailing life.

Advantages of Flexible Solar Panels

• Fit to most surface shapes
• Don't need large amounts of space
• Ideal for sea-travel
• More robust
• Fixed location means they cannot adapt to the conditions
• Cannot be angled for better efficiency
• Lower percentage conversion of sunlight to electricity

Fixed Solar Panels

Fixed solar panels are often attached to mounts that allow you to swivel and adjust the panel's angle toward the sun. This process generates more energy than the flexible panels would because all they do is sit in a fixed position, relying on the sun's rays hitting the panel.

Solar will indeed operate in average daylight, but if you want the best performance, consider angling the panels.

Generally, fixed panels are more expensive to buy and need more significant maintenance and care. They aren't as robust as their flexible counterparts and are also more awkward to mount.

Advantages of Fixed Solar Panels

• Can be angled to increase efficiency
• Higher percentage efficiency of sunlight to electricity
• Need fewer panels
• Can be mounted to most surfaces
• Generally more expensive than flexible panels
• Need more maintenance and care
• Less robust

Monocrystalline Solar Panels

A silicone crystal "seed" is placed in a vat of molten silicon and slowly drawn upwards, as the silicon clings to the surface of the seed. Imagine a snowball gathering snow as it rolls, and you'll understand.

This process forms an ingot, which is removed from the vat and left to cool. It's then sliced into wafer-thin pieces to develop the cells. It's an incredibly wasteful process, as most of the silicon gets discarded.

The advantage of a monocrystalline panel is that they're the most efficient variety, with some of the latest panels converting 22% of sunlight into electricity.

Because of their high productivity, they're also space-efficient. Fewer panels are needed, making them ideal for the limited roof space on boats.

They also have a longer lifespan, which is why manufacturers place 25-year guarantees on them. They perform better in warmer weather, so if you're sailing around the sunnier climes , these panels would be ideal.

Advantages of Monocrystalline Solar Panels

• Most efficient of all the solar panels
• Higher productivity means fewer panels to mount
• Typically have a 25-year guarantee
• Perform better in warmer climates
• Wasteful manufacturing process
• Generally more expensive to buy
• Less robust than other solar panels

Polycrystalline Solar Panels

The manufacturing process for producing polycrystalline panels is very similar to the monocrystalline versions. A crystal silicone "seed" is immersed into a vat of molten silicon and starts to form an ingot.

Unlike the previous method of drawing the silicone to the surface and removing it from the container to cool, creating polycrystalline cells, the molten silicone is allowed to cool with the silicone "seed" in situ.

Thought to be slightly less efficient than the monocrystalline versions, polycrystalline panels are cheaper to produce, making them the recent panel of choice. They also create less waste, which is better for the environment, and have a lower heat tolerance than monocrystalline panels. 

Advantages of Polycrystalline Solar Panels

• Cheaper to produce
• Less wasteful construction process than monocrystalline panels
• More affordable
• Better in colder climates
• Not as efficient as other solar panels
• Less effective in warmer weather

Thin Film Solar Panels

Thin film panels are produced by placing a photovoltaic substance like amorphous silicon or cadmium telluride onto a solid surface like glass to form the cells.

It produces less waste than traditional solar panel construction, and the cost savings is passed on to the consumer, meaning this is the cheapest option for those on a budget.

They also perform better in low-light and in cloudier days, whereas mono and poly panels will still work in those conditions, but need direct sunlight to reach their maximum performance.

The disadvantage of these panels is their efficiency when compared to monocrystalline panels, which have four times the performance. That means you're going to need more panels and more space to produce the same energy.

Plus, they degrade faster than the other two varieties, meaning that they come with shorter warranties.

Advantages of Thin Film Solar Panels

• Cheapest of all the panel varieties
• Perform better in low-light conditions
• The least wasteful manufacturing process
• Can be adapted to be flexible
• Four times less efficient than monocrystalline panels
• Takes up greater roof space
• Degrade faster so have shorter guarantees

What About Marine Solar Panel Wattage?

The most common solar panels are 100-watt varieties , but you can opt for more powerful ones.

At the other end of the wattage spectrum, you can find panels that generate 20 or 30 watts. These smaller panels are excellent for charging smaller electrical items like phones and laptops while you're on the move, but you would need higher capacity if you're a liveaboard boater, or you're embarking on an arduous journey across the ocean.

Solar panels typically come in wattage sizes of 30W, 50W, 100W, 150W, 200W and 300W. But as previously mentioned, for larger vessels, opting for two 300-watt panels might be the best option.

Combined, they'll still generate 600 watts and take up less room than three or four smaller panels.

Monocrystalline Marine Solar Panels

1. renogy monocrystalline 100-watt panel.

Long-lasting and robust, this Renogy panel has an efficiency rating of 18.4%. Designed with boats and RVs in mind, they shouldn't take up too much roof space.

2. Newpowa 100-Watt Monocrystalline Panel

This Newpowa monocrystalline panel offers a 25-year transferrable warranty against a drop in power output.

3. Renogy 100-Watt Monocrystalline Flexible Panel

These panels are incredibly flexible and lightweight and come in 50W, 100W and 160W sizes. They're perfect for boats with a flat roof section.

4. WindyNation 100-Watt Monocrystalline Flexible Panel

Like the Renogy flexible panel, this Windy Nation product weighs just 4 lbs and has a flexing ratio of 30 degrees, so getting it to fit the contours of your boat should be easy.

Polycrystalline Marine Solar Panels

5. hqst 150-watt polycrystalline solar panel.

This is the first polycrystalline product to feature, and it's also the most powerful panel so far at 150W. Plus, when you compare the price of this panel to the Renogy monocrystalline model, there's considerable savings to be made.

6. RichSolar 100-Watt Polycrystalline Panel

This polycrystalline panel has a junction box with an IP rating of 65, along with an IP 67 rating for its MC4 connectors. This means that even the harshest conditions at sea won't affect their performance!

7. Newpowa 50-Watt Polycrystalline panel

At 50 watts, this panel is better suited for smaller craft or for requirements that mean you need less power like running GPS equipment or laptops.

8. Renogy 160-Watt Polycrystalline Panel

This Renogy panel is robust and can withstand high winds, so that's one less thing to worry about in the middle of the ocean . It also has a reinforced surface that's able to withstand high impacts, so again, that rogue wave should slide right over this panel, causing no damage. 

Marine Solar Panels Offer Freedom

Whether you're sailing seas on an epic adventure or sticking to lakes and rivers, solar power is cleaner. You don't have to run your engine to top up the batteries, and it's a lot cheaper in the long run because you save on the ongoing costs of burning fuel that could be avoided.

Whatever style or type of solar panel you choose, having energy created from the sun's rays is incredible. It gives you freedom from power woes like nothing else.

Depending on your location and climate, other off-grid options such as marine turbine generators could be a better option. But they're cumbersome and only work when the wind blows.

In my opinion, marine solar panels for boats provide the best green renewable energy, and if you aren't taking advantage of it, then you should be.

• choosing a selection results in a full page refresh

17 Best Solar Panels For Boats (Buyers Guide)

Welcome to our guide on the best solar panels for boats!

Let’s take a quick guess.

We could be wrong, but chances are, you’re a proud owner of a yacht, sailboat, canoe, or any other particular kind of marine vehicle.

Then one day, you heard a story from your fellow boater about how solar panels for boats are a niche thing gaining traction.

Now, you’re probably thinking:

“What would it take if I want to slap on some solar panels on my boat, bow to stern? Charging my battery with FREE electricity does sound nice. I also wouldn’t mind powering up some appliances to enhance my boating experience.”

The only problem is, the thought of getting this done becomes overwhelming – which is perfectly understandable.

“I hope it’s not too complicated.” you might say.

Contrary to what some of you might think, selecting the best solar panels for boats isn’t that intricate. In this article, we’ll talk about the main criteria for selecting marine solar panels, then we’ll give you our top recommendations to choose from. 

For reference, here are the top solar panel brands for boats that we’ve found on the market:

Alright, let’s dive in!

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Table of Contents

Best Solar Panels For Boats (Editors Choice)

Now, we understand that each of you has specific needs that’ll influence which solar panel you’ll go with.

With that in mind, we took varying common use cases for marine solar panels. Of course, this is not meant to act as standard criteria, it’s simply based on our expert opinion. 

By and large, you are looking at 20 watts up to 300 watts for boats meant for personal use. Of course, commercial boats can go for more. 

Typical use cases:

• Gadgets and Battery Recharge – 20 to 80 watts are enough to power your small gadgets such as GPS, cellphones, and mini laptops.

2. Cold beers and warm showers – 100 to 200 watts are enough for low-power appliances such as portable refrigerators, heaters, etc. We also recommend purchasing lithium-ion batteries and inverters too.

• Boating lifestyle – Going beyond 250 watts means that you have more space to install solar panels. In this instance, we recommend ultralight flexible solar panels. 

Now let’s set some expectations. Having solar panels alone isn’t enough to run a handful of appliances simultaneously. If you want to operate 400 to 2,000 watts worth of devices, you need a high-power inverter and batteries.

Nonetheless, this is a better choice for you than putting a heavy and noisy motor-based generator in your boat. 

Also, marine solar panel systems do not produce excess heat, making your boat safer and cooler. 

Lastly, your fuel source is FREE.

How To Choose Solar Panels For Boats?

Contrary to what some of you may think, learning how to choose solar panels for boats works about the same as designing an off-grid or RV roof solar system.

Four Basic PV System Components

Complete solar panel systems for boats include the four essential components of a photovoltaic (PV) system, namely:

• Solar panels
• Charge controllers
• Batteries or energy storage systems

Solar Panels

When solar panels absorb irradiance from the sun during the daytime, the solar cells convert this solar energy into electric energy. From here, the electric current generates flow into your appliances and serves as their electric source.

Limitations of Solar Panels Alone

However, there are challenges to this simple setup. That is why it’s worth your time and resources to consider other solar system components such as batteries, charge controllers, and inverters. 

One of the inherent problems with solar electricity is using it as you produce it.

Putting batteries or energy storage systems (ESS) in your system solves this problem and allows you to store solar energy for on-demand use and emergencies. 

For example, batteries help you enjoy your appliances continuously. Batteries act as a backup to your solar panels when clouds suddenly block the path of the sunlight.

Of course, having an ESS in your boat’s solar panel system is optional, but if you have appliances that you’ll be using at night or want to be prepared for emergencies, we suggest you consider it in your budget. 

If you’re interested in reading about our top picks for lithium-ion batteries for boats , click here .

Inverters allow you to convert your 12-volt or 24-volt DC panel or battery output into 120 volts or 220 volts AC. Having an inverter in your marine solar system is perfect if you want to run some appliances rated at standard household voltages. 

Solar Charge Controllers

Lastly, solar charge controllers are safety devices meant to prevent your batteries from overcharging or over-discharging. Charge controllers achieve this safety measure by controlling the voltage and current flow to and from your batteries. 

The voltage and current regulating feature of a solar charge controller also mean that your devices and appliances connected to your batteries are protected.

There are various types of solar charge controllers in the market, but we don’t want to geek out too much. Instead, focus on the most common ones, such as the Maximum Power Point Tracking charge controller, a.k.a. MPPT, or the Pulse Width Modulation (PWM) charge controller.

The main difference between PWM and MPPT, charge control devices is that the MPPT devices are more efficient and best for large systems that can maximize their solar charging acceleration benefit, while PWM is for small-scale applications. 

Solar charge controllers that use MPPT can accelerate solar charging of your battery up to 30% of the solar system output. 

On the other hand, PWM charge controllers are older than MPPT controllers. They are cheaper (costing $20 to $60 compared to MPPTs playing around $100 to $729), more straightforward, and less efficient. They’re also great for reducing harmonics which can damage your sensitive electronics.

Sample Solar Panel Setup

For your convenience, here is a diagram of what a solar system looks like that contains all the components we discussed.

Now, let’s focus our attention on solar panels. What is the primary consideration for choosing your marine solar panel? 

The most important feature you should look for when choosing solar panels for boats is their performance quality and ability to withstand harsh weather conditions. Therefore, you’re looking to buy solar panels from reputable companies that focus their values on performance and solar panel production quality. 

Aside from that, other considerations are the weight and size of the panels since (as we’ve previously mentioned) you have limited solar panel real estate to work with on your boat.

What Are The 17 Best Solar Panels For Boats?

Choosing the best solar panels for your boat depends on your situation.

For example, we recommend that “small” boat owners purchase flexible panels while larger boats can afford standard solar panels with robust aluminum frames.  

  1. HQST 100 Watt Monocrystalline 12V Solar Panel

Main Features:

• Cost: $89 ($0.89 per watt)
• Compact Design 
• High-Efficiency Solar Panel
• Corrosion-resistant aluminum frame for better longevity

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• Lightweight (9.92 lbs)
• Space-efficient
• Long lifespan and very robust build
• Solar Panel Only
• Needs mounting Z-bracket

2. Renogy Flexible Monocrystalline Marine Solar Panel

• Cost: $174 ($1.74 per watt)
• Weighs 70% less than conventional panels
• 0.1 inch thick. 95% thinner than traditional marine solar panels
• This solar panel can be flexed to a maximum of 248 degrees which makes it easier to transport and install.
• Perfect for marine use
• Ultra-Portable
• Ultra-Compact Design
• Maintains solar panel resilience despite being lightweight and flexible
• Waterproof: IP 68
• Multiple solar power ratings are available
• Unconventional mounting procedure
• Adhesive instead of brackets
• Mixed reviews on post-purchase technical support
• Solar Panel ONLY

3. Renogy Flexible Kit with 100W Monocrystalline Panel

• Cost: $220 ($2.20 per watt)
• This solar panel can be flexed to a maximum of 248 degrees which makes it easier to transport and install
• With waterproof charge controller
• No inverter

4. Renogy 100 Watt 12 Volt Off Grid Solar Premium Kit

• Cost: $283 ($2.83 per watt)
• Premium MPPT charge controller
• Comes with a fuse
• Rapid, efficient, and safe battery charging
• Waterproof panel and cables: IP67 
• IP65 rated junction box 
• High-efficiency solar cells
• El tested solar modules; no hot-spot heating Corrosion-Resistant aluminum frame
• Best for systems with batteries
• Fast-charging
• Built to last
• Emphasis on safety and longevity 
• Remote control and monitoring via Bluetooth app
• Great value for buyers who appreciate monitoring and fast-charging features
• A bit expensive ($2.83 per watt)
• Mixed reviews on post-purchase technical supportu003cbru003e

5. ECO-WORTHY 25 Watts 12V Waterproof Solar Panel

• Cost: $58 ($2.32 per watt)
• Easy to install
• Best for off-grid applications
• Buyers like that this product’s plug-and-play feature
• Most buyers think it is a good buy
• Some customers have issues with wires and charge controllers. They aren’t as reliable as advertised.

6. Newpowa 30W Watts 12V Mono Solar Panel

• Cost: $60 ($2 per watt)
• Waterproof: IP67
• Plug and Play anderson connectors
• Easy install thanks to pre-drilled mounting holes
• Perfect for boats: corrosion-resistant aluminum frame
• Waterproof panels 
• Great value for money
• Robust and built to last
• Lacks battery and inverter
• Compatible with specific mounting brackets

7. Newpowa 100 Watts 12 Volts Monocrystalline Solar Panel

Main Features :

• Cost: $93.50 ($0.935 per watt)
• More compact new design
• Higher efficiency solar cells
• Includes “Z” brackets and stainless steel hardware screws
• Great customer satisfaction
• Outstanding charging power
• Reliable post-purchase tech support
• Lacks, charge controller battery and inverter
• No indication of waterproof solar panels

8. ECO-WORTHY Complete Solar Panel Kit

• Cost: $500 ($2.50 per watt)
• 21% High solar cell efficiency
• Corrosion-resistant aluminum frame for outdoor use, allowing the panels to last for decades as well as withstand high winds and snow loads
• Complete solar panel kit
• Pure sine wave inverter with LCD display 
• 1 year warranty
• 24/7 technical support team
• An excellent choice to explore all the essential components of a solar system. 
• Complete accessories and easy installation
• Water-resistant
• The entire kit will be shipped in several packages 
• There is a chance of logistic and shipping problems
• There is a chance of receiving defective products

9. SUNSUL 20 Watt 12V Solar Panel Kit

• Cost: $46 ($2.3 per watt)
• Solar panel comes with Waterproof 5A 12V/24V PWM Solar Charge Controller and Adjustable Solar Panels Mount Rack Bracket
• High-efficiency solar cell design
• East installation thanks to the adjustable mounting bracket
• PWM charge controller
• Company claims a perfect After-Sales Service
• High strength aluminum frame
• High-strength aluminum frame
• Waterproof: IP67 and TPT Backsheet
• Great tech support
• Lightweight (4.2 pounds)
• Some customers claim to receive defective items 
• No installation guide comes with the product. You would have to rely on online resources.u003cbru003e

10. Topsolar Flexible Solar Panel

• Cost: $80 ($1.6 per watt)
• Perfect for irregular surfaces or curvatures
• 0.1 inch thick and weighs 4 lbs.
• Ideal for marine solar systems
• High temperature resistant and easy to clean. 
• Solar panels made of advanced waterproof materials. 
• Company claims it is more durable than traditional glass and aluminum model solar panels
• Good flexibility
• Lightweight and Thin
• Waterproof and durable
• Has 100W version
• Portable and compact
• Solar panel ONLY
• Modules must be mounted using silicone structural adhesive on the backside of the panel

11. RICH SOLAR 200 Watt 12 Volt Polycrystalline Solar Panel

• Cost: $172 ($0.86 per watt)
• Standard solar panel size 
• Pre-drilled mounting holes
• Excellent low light performance on cloudy days, mornings and evenings
• Certified to withstand challenging environmental conditions with tempered glass and aluminumm frames
• 25-year warranty on power output
• 5-year material and workmanship warranty
• High Performance
• Durable and Weatherproof
• Fast and easy installation
• Great warranty coverage
• Great post-purchase technical support
• Lacks charge controller battery and inverter
• No mounting brackets

12. WEIZE 200 Watt 12 Volt Monocrystalline Solar Panel

• Cost: $200 ($1 per watt)
• Monocrystalline solar cells have higher efficiency (up to 21%) compared to polycrystalline in bright weather condition
• Long service life and is virtually maintenance-free
• Corrosion-resistant and weatherproof thanks to high quality aluminum frames, tempered glass and sealed junction box.
• Pre-drilled holes compatible with common ground mounts, Z-brackets, side pole mounts and tilt mounts.
• Great for outdoors
• Durable and weatherproof
• High efficiency
• Solar panel only
• No indication of warranty coverage.

13. EF ECOFLOW 110W Solar Panel with Portable Power Station

• Cost: $950 ($8.63 per watt)
• Portable ESS and extra battery included
• Sleek and modern look
• Solar plus storage and inverter  
• Has various charging ports to power all types of devices
• Can support 1200 running watts at any moment
• Premium feel
• Efficient solar power
• Wide device compatibility
• Designed for outdoors
• Modular and expandable
• Perfect for getting your feet wet in solar plus storage
• Modular Design but Exclusive compatibility to the brand

14. Jackery Solar Generator 1000

• Cost: $1,499 ($7.50 per watt)
• Portable ESS with 1002 Wh or 46.4 Ah capacity at 21.6V
• Solar plus storage and inverter 
• Can support 1000 running watts at any moment
• Modular design but exclusive compatibility to the brand

15. Jackery SolarSaga 60W Solar Panel

• Cost: $150 ($2.5 per watt)
• Weighing at only 6.6 lb, this solar panel is foldable and handy with a TPE rubber handle.
• Has a kickstand that leans on an angle ideal for solar energy absorption
• Premium solar panel
• High-efficiency cells 
• It could be coupled with a Jackery portable power station for fast-chargingu003cbru003eu003cbru003eCheck out: u003ca href=u0022https://www.amazon.com/Jackery-Portable-Power-Station-Generator/dp/B07D29QNMJu0022 target=u0022_blanku0022 rel=u0022noreferrer noopener nofollowu0022u003eJackery 240 portable power stationu003c/au003e
• Expensiveu003cbru003e

16. DOKIO Foldable 100 Watt Monocrystalline Solar Panel

• Cost: $200 ($2 per watt)
• Easy operation. Unfold your solar panel then place it on the ground
• Portable with carrying bag
• Durable and corrosion-resistant
• Easy to set up
• Great value for those in need of a foldable panel.
• Weatherproof
• A bit heavy (18.5 lbs)
• Mixed reviews on the design. Some people think that the legs of the panel are substandard.
• A bit expensive ($2 per watt)

17. Foldable Renogy 100 Watt 12 Volt Monocrystalline 

• Cost: $220 ($2.2 per watt)
• 21% High Solar Cell Efficiency: EL tested solar modules with bypass diodes
• High transparency tempered glass for durability and high efficiency in low solar power availability
• No hot-spot heating
• Adjustable, corrosion-resistant aluminum stand
• Durable handle and latches
• Built-in 5-stage solar charge controller charges batteries fast and safely
• Electronic device protection mechanism (overcharging, overload, short-circuit and reversed polarity)
• Easy to set up 
• LCD charge controller with safety features
• Chance to get a defective suitcase.
• Heavy (28.6 lbs)

How Long Do Solar Panels Last On Boats?

While there’s no straightforward answer to this, knowing how long your solar panels will last on a boat depends mainly on the manufacturer and the solar panel’s build quality. 

That said, established solar panel developers usually brag about their warranty policies. Therefore, when reviewing your standard marine solar panels, look for 25 years warranty for the solar panel production and five years for the material itself. 

Flexible and foldable panels (or adjustable panels as we would like to call them) have shorter warranties. This is because elastic panels trade their longevity in exchange for being ultralightweight, ultra-thin, and compact compared to standard panels.

In a nutshell, standard solar panels last you about 25 years, while adjustable solar panels have a typical lifespan of 5 years.

Are Solar Panels Safe On Boats?

Definitely.

If you follow proper wiring procedures and sizes, solar panels are safe on boats. Unlike fossil-fuel generators that generate heat as they produce electricity, solar systems have a negligible risk of starting fires, making solar panels safe on boats.

Are Solar Panels For Boats Worth The Money?

We get this question a lot, and our answer remains the same – solar panels are worth the money. They provide your boat with free, clean electricity. They’re a good investment for rational investors and people looking to transition to green energy.

For those who want more details, the return of your investment for solar panels is usually 2.5 to 15 years depending on the amount of solar power in your area. Read more about it in this article .

Final Thoughts 

Solar panels on boats provide several benefits, mainly monetary savings from clean energy. It is a good purchase for rational investors and people who want to contribute to the green energy movement. Of course, there is a substantial lump sum that you will invest upfront. But trust us when we say that it will be worth it.

Gustav has a Bachelor of Engineering and is currently practicing as a senior-level electrical engineer specializing in research. He is eager to deliver his analyses in a comical fashion while providing you with the right amount of scientific information. He believes that, with a bit of help, a well-informed decision is rewarding to make, it saves you money, and it is a win-win for all - the planet included.

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Renewable Energy Definition and Examples

The most common examples of renewable energy include wind, rain, geothermal heat, waves, tides, sunlight, and waves.

What Are the Best Marine Solar Panels for Your Boat?

Marine solar panel reviews

There are a few things you need to consider when purchasing marine solar panels for your boat. You’ll want to think about the dimensions of your boat, how much wattage your system needs, have you calculated your power output? and what type of connectors you require.

What are marine solar panels and why would you need them?

Marine solar panels are solar panels that are specifically designed for use on boats and ships. They are often used to power navigational equipment, such as lights and radios, or to charge batteries. Marine solar panels can be mounted on the deck of a boat or ship, or they can be installed in a cabin or other sheltered area.

Marine solar panels are a great choice for boaters who want to reduce their reliance on fossil fuels. They are also a good option for boats that spend a lot of time in areas where there is no access to shore-based power sources. Marine solar panels are available in a variety of sizes and shapes, so it is important to choose the right one for your boat or ship.

The Benefits and Disadvantages of Marine Solar Panels

If you’re looking for a marine solar panel that will give your boat the power it needs, there are a few things you need to keep in mind. First, you’ll want to make sure the panel can handle the weather conditions on your boat. Second, you’ll need to decide how much power you’re looking for and what kind of installation process you want to go through.

Finally, be sure to compare prices before making a purchase! Benefits of Marine Solar Panels the main benefit of marine solar panels is that they produce clean energy. This means they don’t contribute to pollution, which can be a concern for many people. There are also no emissions that come from the manufacturing process.

Types of Marine Solar Panels: monocrystalline, polycrystalline, thin film

Marine solar panels are becoming more popular as people become more environmentally conscience. There are three main types of marine solar panels- monocrystalline, polycrystalline, and thin film. The main difference between these types is the way the solar cells are made. Monocrystalline solar cells are made from a single silicon crystal, while polycrystalline solar cells are made from many small crystals. Thin film solar cells are made from a thin layer of photoactive material on a substrate. They are typically less efficient than monocrystalline or polycrystalline solar panels cells, but they are also cheaper to produce.

There is no one “best” type of marine solar panel. It really depends on your needs and budget. Monocrystalline panels tend to be more efficient and expensive than polycrystalline panels, but they also take up less space.

What are the best marine solar panels?

As the world becomes more and more environmentally conscience, people are looking for ways to reduce their carbon footprint. One of the best ways to do this is by using solar panels. Marine solar panels are a great option for those who want to reduce their environmental impact while also enjoying the benefits of solar power. There are a number of factors to consider when choosing marine solar panels. Here are some of the best solar panels on the market today.

The best overall marine solar panel is the SunPower SolarWorld. This is a highly efficient panel that uses a high-performance monocrystalline silicon technology, it’s definitely a top pick.

SunPower Flexible 100 Watt Monocrystalline Solar Panel

Looking for flexible solar panels that can be installed in a variety of places? SunPower’s Flexible 100 watt Monocrystalline Solar Panel may be perfect for you! Weighing only 4.5 pounds, this solar panel is easy to transport and can be installed on curved surfaces, such as a roof, RV, or boat. Plus, the monocrystalline cells provide high efficiency so you’ll get the most power possible from each panel. Order your SunPower Flexible 100 watt Monocrystalline Solar Panel today!

SunPower Flexible 100 Watt Monocrystalline Solar Panel pro’s and con’s

When it comes to solar panels, there are a ton of different types and brands to choose from. SunPower is one of the most popular and well-known brands, and their Flexible 100 Watt Monocrystalline Solar Panel is a great option for those looking for quality and efficiency. However, there are some pros and cons to consider before making a purchase.

Pros: Easy to install, high-efficiency, and affordable!

Cons: SunPower is a well-known company, so you may experience some customer service issues.

Renogy 100W Solar Panel

This 100 watt solar panel is perfect for smaller boats that need less than 500 watts of power.

This is a company that specializes in solar energy products. They make a 100 watt solar panel that is great for small to medium applications. This renogy panel can be used for a variety of purposes, including camping, charging batteries, and even powering homes. It is a durable and efficient product that is perfect for anyone looking to reduce their reliance on the grid and perfect for small boats.

Renogy 100w solar panel pro’s and con’s

Renogy is a company that specializes in the manufacturing and sale of solar panels and other related products. Recently, they released a 100-watt solar panel that has been met with both positive and negative reactions from consumers. In this article, we will discuss the pros and cons of the Renogy 100-watt solar panel.

Renogy 100-watt solar panel offers a variety of different features that are perfect for the avid outdoorsman. The included mounting hardware makes installation simple and quick and it has a tough tempered glass cover that can withstand harsh weather conditions. The solar panel also comes with a temperature sensor which allows the user to monitor and control the temperature of the panel. The actual frame of the solar panel is made from aluminum so it can hold up against any kind of weather condition.

100W Lightweight 12V Mono Semi-Flexible Solar Panel

This solar panel is perfect for anyone looking for an easy and lightweight way to get into solar! The semi-flexible panel can be mounted on curved surfaces, like a roof or RV or deck of a boat, and has a 100W rating. It also outputs 12V DC, making it perfect for smaller projects. Solar Panel with Battery Backup Power Source This solar panel is perfect for those who want to do their own DIY projects. It has a built-in battery that is able to produce 12V DC giving you power when there isn’t any sunlight.

100W Lightweight 12V Mono Semi-Flexible Solar Panel pro’s and con’s

There are many different types of solar panels on the market today. Some are more efficient than others, but what if you don’t need a lot of power and you’re looking for something lightweight and easy to transport? A 100W 12V mono semi-flexible solar panel might be just what you’re looking for. Let’s take a closer look at the pros and cons of this type of solar panel.

On the plus side, these solar panels are very thin and lightweight, making them easy to transport. They also have a semi-flexible design, which makes them more resistant to damage than traditional solar panels. Additionally, they can be mounted in a variety of positions, which gives you a lot of flexibility when it comes to placement.

However, there are some downsides to consider as well. These solar panels are only 12V and will not generate enough power to run your car’s electrical system. They are also less efficient than traditional 12V solar panels, so you will need to invest in a quality inverter for this type of panel.

Types of marine solar panel

Marine solar panels are designed to withstand the rigors of the marine environment. There are three types of solar panels:

The most common type of marine solar panel is the crystalline silicon panel. This type of panel is made of silicon crystals that have been cut into small squares and then connected together. The silicon crystals are very efficient at converting sunlight into electricity and can last for many years. The crystalline silicon solar panel is less expensive to produce than the thin-film solar panels.

Thin-film solar panels are made of semi-transparent sheets of film and coated with a layer of black paint.

Another type of marine solar panel is the amorphous silicon panel. This type of panel is made up of thin layers of silicon that have been sprayed onto a metal substrate. Amorphous silicon panels are not as efficient as crystalline silicon panels, but they are more durable and can last longer in harsh environments.

Structural silicone solar panels are made up of a polymer matrix. The solar cells are put in an interconnected structure that allows for the transmission of sunlight onto the solar cell. Because the cells are made from a polymer, they are flexible panels and can be curved to fit into curved surfaces.

The final type of marine solar panel is the CIGS (copper indium gallium selenide) panel. The term “CIGS” stands for copper indium gallium selenide. CIGS is a combination of three different types of materials. These materials are a type of semiconductor called gallium that is mixed with two elements, indium and selenide.

Efficiency of Marine Solar Panels: what to consider when choosing a panel

When it comes to solar panels, there are a lot of factors to consider. One of the most important is where the panel will be installed. Marine solar panels need to be able to withstand harsh weather conditions and be durable enough to last in salt water. They also need to be efficient in order to generate enough power for a boat or ship.

Size of Marine solar Panel

A marine solar panel is a device that is designed to convert sunlight into electrical energy that can be used by boats or ships. Marine solar panels are available in a number of different sizes, and choosing the right size for your boat or ship is important for ensuring that you get the most out of your solar panel.

Most marine solar panels range in size from about 50 watts to 250 watts, though there are some larger panels available. The size of your boat or ship will help determine which size panel is best for you. If you have a small boat or ship, a 50-watt panel may be all you need, while a larger boat or ship may require a panel with more wattage.

It is also important to consider the location of your boat or ship when choosing a marine solar panel.

Portability of Marine Solar Panel

A marine solar panel is a great way to have a renewable energy source while on the water. There are many benefits to using a marine solar panel including portability, reliability, and efficiency. Marine solar panels can be set up quickly and easily, making them the perfect choice for boaters who want to reduce their environmental impact.

Warranty of Marine Solar Panel

The marine solar panel is a device used to convert the energy from the sun into electrical power. This can be used to power small appliances on a boat or ship, or to charge a battery bank. A marine solar panel typically has a warranty of five years, though some may last up to 10 years. It is important to read the warranty before purchasing a panel, to ensure that any potential issues will be covered.

Reliability of Marine Solar Panel

If a marine solar panel is not working, the entire boating experience can be affected. A marine solar panel must be able to withstand intense weather while still providing energy and charging your devices.

There are a few different types of marine solar panels available on the market. The most popular type is the crystalline panel. These panels are made up of small crystals that convert sunlight into energy. They are efficient, but can be expensive.

Another type of marine solar panel is the amorphous silicon panel. These panels are less efficient than crystalline panels, but they are cheaper and more durable.

The final type of marine solar panel is the flexible panel. These panels are made of a silicone material, and can be stretched out to fit various shapes. They are less efficient than the other types of solar panels on the market, but they are flexible, making them more durable and able to withstand harsh weather conditions.

How Much Do Marine Solar Panels Cost?

Solar panels are becoming more and more popular as people look for ways to save money on their energy bills and help the environment. Solar panels can be used on land, but they can also be used on boats and other watercraft. Marine solar panels are designed to withstand the harsh conditions of the ocean, and they can provide power for lights, radios, bilge pumps, and other electronics.

The cost of a quality marine solar panel varies depending on the size and type of panel. Prices start at around $200 for a small panel that can provide power for a few devices, and prices go up to $2,000 or more for a large panel that can provide power for an entire boat. Some factors that affect the cost include the wattage of the panel, the brand name, and the type of installation.

Which Marine Solar Panel is Right for Me? Factors to consider when purchasing a solar panel

In recent years, solar panels have become a more popular choice for homeowners looking to reduce their energy costs and environmental impact. Solar panels convert sunlight into electrical energy, which can be used to power your home or business.

There are a number of factors to consider when purchasing a solar panel, including: the size of the panel, energy requirements, the type of panel, the brand, and the price. You also need to consider where you will install the panel and what type of roof you have.

Some homeowners may choose to install a solar panel in order to generate enough energy to power their entire home. Others may choose to install a solar panel in order to supplement their current energy use.

The best way to determine which marine solar panel is right for you is to consult with a renewable energy specialist who will have knowledge of all the popular brands and which have easy installation. Professional advice is always a good idea.

How Do Marine Solar Panels Work?

Marine solar panels are designed to work in harsh environments even on cloudy days , making them perfect for use on boats and other watercraft. How do marine solar panels work? Let’s take a closer look.

Marine solar panels are a great way to produce electricity. They work by converting sunlight into electrical energy. This process is called solar photovoltaics (PV). When the sun shines on the solar panel, photons (particles of light) are absorbed by the cells in the panel. This creates an electrical current, which is then sent to an inverter to be converted into usable AC electricity for your home.

The main difference between standard solar panels and marine solar panels is that the latter are built to withstand more wear and tear. This includes corrosion from saltwater and weathering from wind and sun. Marine solar panels also tend to be slightly more efficient than their terrestrial counterparts, since they’re facing the sun more directly. Marine solar panels also aren’t as sensitive to orientation.

If a standard panel is tilted slightly towards the sun, it will produce more energy than if it were perfectly perpendicular. This gives you more flexibility when installing your solar panels and puts them in less danger of breaking.

Most marine solar panels are installed in two stages. The first is the panel itself, which is typically mounted on top of the boat or vessel. The second stage is the electrical wiring, which is run down into the boat and connected to a battery bank or another electrical system.

What Size Marine Solar Panels Do You Need?

If you’re wondering what size marine solar panels you need, you’re not alone. Many boaters are interested in installing solar panels on their vessels but don’t know where to start. The good news is that there is no one-size-fits-all answer to this question – the size of marine solar panels you need depends on a variety of factors, including the size and type of your boat, how often you use it, and how much energy you need to power your electronics.

That said here are a few things to keep in mind when shopping for solar panels: first, consider the wattage of the panel. This tells you how much energy the panel can produce – the higher the wattage, the more power your boat will have. Second, think about how much space you have available on your boat.

Installation of Marine Solar Panels: Tips for installing solar panels on your boat

Solar panels are a great way to reduce your boat’s environmental impact and save on energy costs. Installing solar panels on your boat can be a little tricky, but with these tips you’ll be up and running in no time.

1. Make sure you have enough space on your boat for the solar panels. They will need to be mounted in a sunny spot where they will get direct exposure to the full sun energy.

2. Check the voltage and amp rating of your solar panels to make sure they are compatible with your boat’s electrical system.

3. Run the wiring from the solar panels to your battery bank, making sure to use appropriate connectors and cables.

4. Install a charge controller between the solar panels and the battery bank to regulate charging and prevent overcharging.

Maintenance of Marine Solar Panels: How to keep your solar panels in good condition

How to maintain marine solar panels:

1. Inspect your solar panels regularly for damage and dirt build-up.

2. Use a soft cloth and a mild detergent to clean the panels, making sure to avoid getting any water inside the panel housing.

3. Check all wiring and connections for corrosion or other damage, and repair or replace as needed.

4 If you live in a cold climate, make sure to keep the solar panels free of snow and ice during winter months.

Getting the most out of marine solar panels 

Marine solar panels can be a great way to reduce your environmental impact while boating and sailing. They are also a reliable source of power, even in harsh weather conditions such as high winds. Here are a few tips on how to get the most out of marine solar panels:

1. Make sure you install your solar panels in an area that gets good sun exposure, this will help insure you produce a lot of energy. The best place is usually on the roof, but they can also be installed on the side of your boat.

2. Keep your solar panels clean and free of debris. A clean panel will absorb more sunlight and generate more power.

3. Use a solar controller to optimize the performance of your solar panels. This will help ensure that your batteries are getting the most juice from your panels.

4. Investing in a high-quality battery charger is always a good choice. 

Marine Solar Regulators

Marine solar regulators are an important part of any off-grid solar system for boats or RVs. They help to protect your batteries from overcharging, and keep your system running smoothly. There are a few factors to consider when choosing a marine solar regulator, including the voltage of your system, the amperage of your panels, and the type of battery you are using.

There are a number of different marine solar regulators on the market, from simple mechanical models to sophisticated digital devices. The best one for your needs will depend on your specific requirements and budget. It is important to do your research before making a purchase, so you can be sure you are getting the right product for your needs.

The search for renewable energy sources has led scientists to explore a variety of solar panel technologies. One area that has seen recent growth is marine solar panels. These panels are designed to be installed on boats and other watercraft to provide power for propulsion, lighting, and other onboard systems.

Marine solar panels offer several advantages over traditional solar panels. For one, they are less affected by weather conditions, since they are installed in a protected area. They are also more efficient in colder temperatures, making them a good option for use in northern climates. Marine solar panels can also be used to charge batteries or power electric motors, making them a versatile choice for many applications, if you purchase a good quality solar panel.

Wayne Foster

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At Sun Powered Yachts we hope to inspire and inform yacht owners on the benefits of going solar with SunPower & Maxeon. We're here to answer any questions you may have. 

With a background in sailing & solar, and also from living off-grid for 11 years in Hawaii, we have the knowledge to help you with your solar install.  Find out more about us  

In 2021-2022 we spent 15 months as a family living aboard our sailboat, a Dufour 382 sailing from Corsica to Cancun and more recently to Florida & Bahamas .   An intrepid adventure of over 7,000NM visiting 12 countries along the way.  We're available for solar consultations with SunPower & Maxeon panels in stock in the USA ready to fulfill orders. 

Aloha, Katie & Lyall

+1 808 825 2670

info@sunpower edyachts.com

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SunPower ® 100 Watt

Maxeon ®   a ir 3 30 watt.

SunPower ®  50 Watt

Maxeon ® 415 Watt -R (all black)

Maxeon ® 475 Watt

Maxeon ® 470 Watt

Choose your sunpowe r ® e-flex solar panel bundle, flexible panel bundles.

1x 50 Watt bundle

2x 50 Watt bundle

1x 100 Watt bundle

Free shipping in usa*, *at sun powered yachts we only sell premium cosmetic quality sunpower® e-flex panels.  our inventory is warehoused in arizona, please visit our shipping policy  for full details  , 1% for the ocean, we are committed that 1% of your order with us goes directly to support the papahānaumokuākea marine debris proj ect ( pmdp ) in hawaii.  the 2023 clean up season included 60 days removin g an incredible 212,410 lbs of marin e debris  .

Federal Tax Credits

Have you heard about the Federal Tax Credits that you could take advantage of for going solar on your boat?  Yes, your boat! 

Do you have a head, galley & bunk aboard? Then you may qualify and t he Federal Tax Credit has now gone back up to 30% of the total cost to put your solar system in place.

This can include solar panels, controllers, wiring, labor etc. and can now more easily include batteries - maybe time for that lithium upgrade to Battle Born

SunPower Advantage s

Silent power

Solar panel systems burn zero fuel and have no moving parts. They are clean and silent, producing no atmospheric emissions or greenhouse gases that are harmful to the earth.  Enjoy those quiet anchorages with no more noisy engine/generator running just to charge your batteries.

Easy install

The simple and easy installation of SunPower® E-Flex panels on your bimini, dodger, or deck, will reduce costs of adding an expensive davit or custom racking and mounting solution for traditional large & heavy fixed  frame solar panels.

Highest quality

Incredibly reliable and easy to maintain. With no moving parts, visual checks and servicing easily keep systems operating. Solar panels are robust & durable with a junction box designed with a high level of protection from dust & water ingress.

SunPower Solar Panel Installs

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News & reviews.

Maxeon to open new factory in USA

Great news! Maxeon recently announced (Aug 10th) that they will be opening a 3 Gigawatt factory in New Mexico. Construction will begin Spring 2024 and so by 2025 that's high efficiency Maxeon solar panels being made right here in the USA! 

Read our news post for full details.

For sale - 'Blake' our Dufour 382

Are you looking for a boat already set up to go cruising?  We have our 2016 Dufour 382 GL 'Blake' listed for sale on Yacht World .  She is the adventure version with taller mast/deeper keel, 950W of SunPower flexible solar panels, a DC watermaker, new dinghy and plenty of safety gear.  Currently hauled out in Freeport, Bahamas.  For more details contact our broker Amanda Haley with South Florida Sailing

T: 954 444 2283

Check out our Install List  

We have added an Install List page to our website which currently has over 130 installs from our customers.  Get inspired by what other boat owners have added for SunPower & Maxeon solar panels. 

Maybe you own a Lagoon 400 or a Morgan 41 and wonder what panels might fit aboard, check out the list to see how other owners have gone solar aboard.

Calico Skies 3x 410W

Bill & Grace sail Calico Skies , a Sabre 36, and whilst in Mexico they installed 3x410W SunPower fixed frame solar panels as part of a major upgrade to their arch/davit system.  

Check out their YouTube episodes including  #177 to see how they get on adding 1,230W (or 1.23kW) of SunPower solar panels.

Calico skies install details

"We made 7.2kWh yesterday out of our panels, what an upgrade!" 

Bill & Grace

SV Delos 3x 410W + flex

Brian & Karin of SV Delos   installed 3x410W SunPower fixed frame panels when on the hard in Mexico ( YouTube Ep.407 ) 

Combined with their SunPower E-flex panels, which have been aboard for ~3 years ( YouTube Ep.262 ) they now have just under 2,00W of solar keeping them powered up in the Pacific - awesome! 

SV Delos install details

"Love our new 410W panels and they're the same size as the old 300W ones - woohoo!"

Brian & Karin

Sailing La Vagabonde 2x 470W + flex

Riley & Elayna of Sailing La Vagabonde have been working on their new Rapido 60' trimaran and added 2x470W Maxeon fixed frame panels. 

They also have 6x170W SunPower flex panels they can deploy when needed.  With a 48V battery bank these panels are wired in series  YouTube episode

SLV install details

"Thank you, the solar panels have been absolutely incredible."  

Riley & Elayna

Testimonials

"So now I generally

Don't bother hooking, up to shore power".

     Thanks for all the help in planning my solar project for my boat. The two 170W flexible panels fit well on my Bimini and now I generally don't bother hooking up to shore power.  Although I haven’t had any long trips since my installation I have done a few day trips. And even with fridge, radio, plotters, autopilot and occasional radar it seems that these panels are keeping up with my usage. The advice and service has been great.   Thanks again.

Jeanneau Sun Odyssey 469

"It is by far the best decision I made "

         I bought a solar system from Sun Powered Yachts in 2020. It is by far the best decision I have made for the electrical system on my boat. I would (and do) recommend Sun Powered Yachts to anyone looking to add solar to their boat.

Endeavour 33

"Terrific customer service, always responsive"

         The process of researching a solar solution for my Beneteau 41 was simplified & clearly understood once I discovered Sun Powered Yachts.  Terrific customer service, patient, always responsive with guidance and products that just work. Being a novice at setting up a solar system, I had many questions along the way, and the team at Sun Powered Yachts were always there to answers my questions and provide support.

Beneteau 41

Become a more sustainable sailor with SunPower® &  Maxeon® solar panels

Sunpower® solar videos, our beautiful boat home (full boat tour).

Mastering OFF-GRID Living: 4 Key Things Every Sailor Should Know ⛵️ Sailing Vessel Delos Ep. 441

New Feature: Prioritising solar or wind when on shore power Victron Energy

GOING SOLAR - Video by Profiles in Dust (2023)

Custom Double Flexible Solar Panel Mounting System (No Drilling, Welding, or Permanent Adhesive)

Fundamentally different solar cells, chosen by champions

6 Awesome Solar Boats for Eco Sailing in 2024 (Guide)

Liza pivoted from environmental consulting and doing impact assessments to writing about her two most counter-intuitive but passionate interests: sustainability and the importance of living an eco-conscious life; and marketing, martech, and AI. When she’s not writing, you can find her living a zero-waste-adjacent life in South Africa, falling down research rabbit holes on the internet, or out hiking with her dogs.

Introduction

Liza Shuttleworth pivoted from a career in environmental impact assessment and consulting to becoming a full-time writer, focusing on her most passionate (and diverse) interests: ecological conservation, sustainability, waste management and marketing, mar-tech, and AI.

Her professional portfolio reflects a diverse array of writing and consultancy roles spanning environmental science, marketing, and technology.

She has written for prestigious online and print publications on topics that include sustainability, climate change advocacy, waste management, and marine conservation, as well as marketing strategy, mar-tech, and the proliferation of AI tools for marketing.

Liza has an extensive professional background, having held management and consultancy positions within the environmental science, waste management, technology, and marketing sectors.

Her writing and editorial positions for both print and online publications have shaped content in ways that educate and inspire readers about sustainable living, climate change, and the power of innovative technology to overcome challenges in any setting.

Liza's academic background is rooted in a Bachelor of Social Science, focusing on Media and English. Beyond this, she has pursued tertiary qualifications in geography, psychology, and marketing, further enriching her knowledge base and contributing to her multi-faceted approach to writing and advocacy.

Solar boats are becoming a hugely popular choice for eco-friendly sailing. They’re quiet, can sail great distances without needing to stop for fuel, produce no carbon emissions, and do not rely on fossil fuels.

The popularity of solar-powered boats represents an evolution in marine transportation in favor of renewable energy and sustainability. Solar-powered boats provide a window into a future where clean, emission-free transport is not only possible but also preferred, due to developments in solar technology and design.

Solar boats are the ultimate of innovation and environmental responsibility, whether they are being used for peaceful journeys along beautiful canals or for bold ocean expeditions.

We reduce our dependency on scarce fossil fuels and lessen the ecological effect of traditional boating techniques by using the sun’s power to move us over the sea. Solar boats have the potential to completely transform the maritime sector and open the door to a more environmentally conscious and sustainable future for all, especially as the demand for eco-friendly alternatives keeps rising.

So, how do solar boats work? What are the benefits? And what are the best solar boats on the market? 

In this guide, we explain how solar boats function, the advantages of using them, and six impressive solar boats you can purchase in 2024.

Let’s dive right in!

Table of Contents

How Do Solar Boats Work?

In recent years, solar panel and rechargeable battery technology have improved dramatically. Panels are lighter, stronger, and more efficient.

Batteries are more compact, more efficient, and weigh considerably less than they did in the past. Both batteries and panels now last longer and cost less than they used to.

These advances in technology and a growing interest in eco-friendly sailing have shifted the development of solar yachts from idealists’ dreams to the mainstream.

So, how exactly do solar boats work? 

Solar boats use solar energy to power their motors, navigation systems, and onboard electronics, and appliances.

The solar system works much the same as a solar system on a house or RV , with some structural differences to meet the unique demands and challenges of a marine environment.

Solar panels mounted on the boat harvest solar power from the sun and send it to a charge controller , which controls the flow of electricity to a bank of rechargeable (usually lithium-ion) batteries.

From the batteries, power is sent to the electric motors, navigation systems and appliances via an inverter, which converts direct current (DC) to alternating current (AC). Most appliances like kettles, microwaves, and hair dryers use AC.

A solar system can be added to any boat, making it a hybrid or even just to supplement a little power using a renewable resource.

S olar is a great way to reduce your carbon emissions, reduce your fuel costs and increase the distance you can sail without stopping to refuel .

However, if you’re looking to buy a solar boat that is designed and built specifically for solar sailing, there are some really great options to consider.

What are the Benefits of Using a Solar Powered Boat?

When it comes to solar boats, there are some great benefits and they’re not limited to renewable energy and fewer carbon emissions:

• No reliance on fuel – diesel generators can be used as an emergency back up but they’re not needed for everyday sailing or electricity generation.
• Unlimited range: when batteries are constantly recharged by the sun, there is no need to stop to refuel and you can keep going indefinitely.
• No noise and no fumes: as there is no engine, there is no noise and no diesel fumes. This makes the experience of sailing a solar boat much more peaceful.
• No pollution: on a solar boat, there is no engine producing noise pollution, no carbon or greenhouse gas emissions , and no risk of fuel or oil spills.
• More space: the absence of engines frees up a lot of space. Electric motors and batteries can be housed anywhere on the boat and do not take up as much space as engines and machinery, which means room for more storage compartments to keep your gear or equipment.
• Lower running costs: beyond the initial investment and occasional maintenance, solar is completely free. This cuts out fuel costs and ongoing engine maintenance costs.
• Less maintenance: solar panels need to be cleaned regularly to be most effective but that is the only ongoing maintenance needed. Once a good solar system is installed, it generally needs very little maintenance.
• No limitations on electrical use: with solar, the supply is free and if you’re not pushing the motors to travel at speed you will often have more electricity than you need. This means you don’t need to watch your power consumption and you can run your air conditioning as much as you want!
• Options to sell power back to shore stations: if you regularly generate more power than you need from your solar, you can share it with others or sell it back to the grid at some shore stations.

The benefits you will enjoy from a solar boat vary, depending on your location and the specifications of the boat you choose. There are also some downsides, for example, solar boats are generally slower and the initial investment is quite high.

That said, solar boats are well worth the investment!

So, let’s look at some of the awesome solar boats available on the market in 2024:

6 Awesome Solar Boats

There are many great solar-powered boats to choose from and we have selected six of the best to feature here. We have chosen a range of sizes, styles, and price points so there should be something for everyone on this list!

1. Silent Yachts – Silent 55

The Silent 55 by Silent Yachts is one of their smaller solar yachts and can be handled by two people, with or without any additional crew.

It is spacious, and beautifully designed to be as economical as possible without losing any of the luxuries of their larger boats. With three to six cabins and all the amenities you can imagine, it offers everything you need to live on board permanently.

Check out this video by Kara and Nate to see their experience of the Silent 55 and meet the couple behind the iconic Silent Yachts company:

[embedyt] https://www.youtube.com/watch?v=iIte4FNI0U0[/embedyt]

Where to Buy: Silent Yachts

Price: From €1.97 Mio.

2. Serenity Yachts – Serenity 64

The Serenity 64 is a solar-powered hybrid yacht with a diesel engine. It can run on either, giving it a combination of unlimited range using solar or faster cruising using diesel.

It is a spacious and luxurious yacht, with plenty of living space and four cabins with en suite bathrooms.  The Serenity is the smaller of the two solar-powered boats offered by Serenity. The Serenity 74 is bigger and more luxurious, with an interior designed by Neiman Marcus Fashion Director Ken Downing.

Take a look at this video by Serenity Yachts to see more of the Serenity 64:

[embedyt] https://www.youtube.com/watch?v=ltyu-KPesg0[/embedyt]

Where to Buy: Serenity Yachts

Price: From $3.3 million

3. Sunreef Yachts – Eco 80 Sail Catamaran

Sunreef Yachts Eco sail catamarans take eco-friendly sailing to new heights. Their luxury solar yachts use a special ‘solar skin’ that covers any composite structure on the yacht to provide solar power from every angle.

They also use hydro and wind power to supplement the solar and have a sail. The green power generated on their innovative solar boats is enough to propel the boat, run all the onboard appliances and charge the electric water toys.

Taking their commitment to the environment up a notch, they use recycled and reclaimed materials, non-toxic paints, and natural fibers.

Check out the video below by SUNREEF YACHTS OFFICIAL on a day aboard the Sunreef 80 Eco Catamaran:

[embedyt] https://www.youtube.com/watch?v=hXFg1R1qcgI[/embedyt]

Where to Buy: Sunreef Yachts Eco

Price: Price on Request (depends on the custom specifications)

4. Soel Yachts – Soel Senses 48

The Soel Senses 48 is a 48ft solar electric catamaran. It was designed to be solar-powered and is slender and lightweight to make it more economical.

There are two sleeping berths for two people each, and another four people can sleep in the salon. The interior and the exterior are both sleek and modern.

Everything on the Soel Senses 48 has been designed thoughtfully to make it as comfortable and functional as possible. It is faster than other solar yachts, due to its smaller size and innovative design.

Check out this video by Jim Waltz to see a little more of the Soel Senses 48:

[embedyt] https://www.youtube.com/watch?v=t5IOCWPwGXY[/embedyt]

Where to Buy: Soel Yachts

5. Azura Marine – Aquanima 40

The Aquanima by Azura Marine is powered entirely solar and features some innovative adaptations that make it even more economical and eco-friendly. For example, rainwater collection from the solar panels on the roof and the fact that excess solar can be sold back to shore stations.

The Aquanima is beautifully designed and the interior is clean and modern. It has two double guest cabins and two single crew cabins. It is one of the most cost-effective options if you’re looking for a purely solar-powered boat.

Take a look at this video by Azura Marine to see the Aquanima in action:

[embedyt] https://www.youtube.com/watch?v=X25IRdHoHqI[/embedyt]

Where to Buy: Azura Marine

Price: From €523,000

6. Silent Yachts – Silent 80 Tri-Deck Solar Catamaran

The Silent 80 Tri-Deck Solar Catamaran is a superyacht that is completely customizable. It offers huge amounts of space, with three decks that can be customized to suit the owner’s needs.

The top deck can be open or enclosed and can be used as additional living space or a luxury master suite, opening onto a private outdoor space. Both open and closed versions include four to six customizable cabins.

As a solar-powered yacht, it has more space where the engines would normally be and that storage space can be used to house water toys and additional recreational equipment.

Check out this video by Yachts For Sale to see more on the Silent 80 Tri-Deck Catamaran, how it is built and what sets it apart:

[embedyt] https://www.youtube.com/watch?v=KCZMzE5Q8lc[/embedyt]

Price: From €5.51 Mio.

Final Thoughts on Solar Boats

As solar and battery technology has improved, and boat owners have become more conscious of their environmental impact, solar boats have become both more viable and more desirable.

Modern solar boats, from small solar-powered yachts to solar superyachts, are equipped with state-of-the-art technology to make them economical, easy to maintain, and a pleasure to use.

They’re also becoming increasingly affordable, and we hope, will be a mainstream option available to every eco-conscious sailor soon!

Electrek: I Drove A Rare Solar-Electric Yacht to Test Clean-Sea Propulsion, Here’s How It Went

Environmental Protection: The Environmental Impacts of Boating

Custom Marine Products: A Cruiser’s Guide to Selecting and Sizing a Solar Charging System

Forbes: Solar-Powered Yachting: A Look Inside ‘The Tesla of Yachts’

Knysna Yacht Company: Top Things to Know About Yacht Solar Power

Robb Report: How Zero-Emission, Solar-Powered Yachts Entered Boating’s Mainstream

Robb Report: Solar-Powered Yachts Are Taking Over. Here’s Why That’s a Good Thing

The Land Between: Recreational Boating and the Environment – Tips and Tricks for Environmentally Conscious Boating

Yachting Monthly: Sailing with Solar Power: A Practical Guide

Frequently Asked Questions

How does a solar boat work.

Solar boats use renewable energy from the sun to run their motors, electrical systems, and onboard appliances. They do not use petrol/diesel generators or engines and meet all their power needs using solar panels and batteries. Read the full guide for more details on how a solar boat works.

What are solar boats used for?

Solar boats are used for any boating purpose but they’re most frequently used for recreational sailing, such as yachts and catamarans, as ferries and tour boats, or as houseboats. Solar boats are generally slower and less powerful than fuel-powered boats. In situations where speed is needed, solar is usually supplemented with wind-sail or fuel-driven motors. Read the full guide for more on solar boats.

What is a solar yacht?

A solar yacht is a yacht that uses solar energy to power its electric motors and all the electronic equipment on board. Solar yachts do not rely on diesel or petrol engines and run solely on solar power. They do sometimes have other power sources, like backup diesel generators or engines. Read the full guide for more on solar yachts.

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Sustainability Success

10 SOLAR Boats 2023 & 2024 | Electric Yachts & Catamarans

With more steps being taken towards sustainable development, new, eco-friendly solar boats have been introduced in the world of green travel: solar electric catamarans. 

Solar boats are electric yachts that can go for long distances without needing to stop for fuel and without emissions. Those solar catamarans are interesting eco-friendly alternatives to the classic power boat or sailing yacht for cruising. However, there are also a few disadvantages that you should know about before purchasing one!

Table Of Contents

10 Solar boats, electric yachts & catamarans

Here are the best solar boats that will delight you with a top-notch sustainable yachting experience based on your requirements:

Sunreef Yachts – Eco 80 Sail Catamaran

• Silent Yachts – Silent 80 3-Deck

HH Catamarans – HH44

Silent yachts – silent 60, sunreef 43m eco (140 ft).

• Silent 120 Explorer
• 100 Sunreef Power Eco

Azura Marine – Aquanima 40

Soel yachts – soel senses 48, serenity yachts – serenity 64 (hybrid).

Here’s a quick summary of the features of the best solar catamarans for green yachting in 2023-2024:

If you are an advocate of sustainable yachting or sustainable tourism and are looking to buy an eco-friendly boat that doesn’t rely on fossil fuels , then you would do well to consider getting a solar catamaran. In this article, I will go through the pros and cons of 10 of the best solar yachts and superyachts that you can buy in 2023 and 2024!

It is also important to note that while there are solar panels for sailboats that you can fit on older models, those new boats have been specifically designed to maximize the use of renewable energy.

Most Luxurious + Most innovative solar system

The Eco 80 Sail Catamaran is one of the electric solar boats provided by Sunreef Yachts.

It features a unique “solar skin” that covers all composite structures on the boat, including hull sides, boom, mast, bimini, and superstructure. This green tech makes it possible to place solar panels where it wouldn’t normally be possible (like the hull and any other smaller but useful surface) and provide enough solar energy from every angle.

The boat is 80-feet long (24.38 meters) and includes electric motors that push it smoothly over the water without causing any vibrations or noise.

Besides being solar powered boat, the Eco 80 Sail Catamaran can also be powered by wind and hydropower. It is designed with a sail on its structure, allowing it to tap into wind power and supplement the solar.

The solar powered sailboat generates enough green power not only to propel the boat and keep it moving but also to charge the essential electric water appliances and other water-sport toys.

So far, the Sunreef Yachts Eco solar sailboats have earned a good reputation for being eco-friendly and sustainable. Besides, this solar powered catamaran takes its commitment to the environment a notch higher by using recycled materials , natural fibers, and non-toxic paints to create their boats.

It is no wonder that Sunreef Yachts have been winning environmental awards for so many years. This solar sailboat is one of the most remarkable boats you can ever invest in and it clearly shows the latest advancements in technology .

Prices: about $8 million USD

Where to buy : Sunreef Yachts .

• Larger surface covered with solar panels, that are installed also along the hull, and in other unusual areas.
• The batteries are 30% lighter than normal
• Unlimited cruising range.
• It runs silently and does not cause pollution.
• It has also traditional sails, so it can cruise also when it is not sunny without relying on batteries.
• Luxury, superb quality and finishing
• Great helm position.
• The solar catamaran is very costly (going for $8 million USD or more).
• The solar panels installed on the sides of the catamaran may not be appealing to the eye of all people.

Silent Yachts – Silent 80 Tri-Deck Solar Catamaran

Best pure electric

The Silent 80 Tri-Deck Solar yacht is popular for the large amount of space it offers.

This solar catamaran by Silent Yachts features three large decks that can be easily customized to fit the owner’s preferences and needs. The topmost deck can either be open or enclosed.

This solar powered yacht offers 4 to 6 cabins that are customizable, regardless of whether the deck remains open or enclosed. Besides, the top deck provides additional living space and can be used as a luxury master suite that opens onto a private space outdoors.

Where to buy : Silent Yachts .

• Purely electric propulsion that can be helped by the kite sail.
• The finishing, while being of high standards, doesn’t seem to be at the level of other options in its category.
• Quite costly, with prices starting at about $6 million USD.
• If going for a long cruise during cloudy days you may need to run the generator to keep going.
• The kite sail helps to give some propulsion using wind, but it is less effective than traditional sails.
• The absence of a traditional sail may make the boat a bit less stable, compromising a bit of the comfort while cruising.

Best for world cruising

HH Catamarans is a small boutique boat builder designing some of the most impressive solar boats for cruising, with one of their latest creations being the HH44.

The HH44 is a groundbreaking new boat that is designed to be eco-friendly and efficient.

The boat has a large battery bank that can be charged by solar panels, and also has two electric motors that can be used for electric propulsion up to 7 knots for up to 2h.

The HH44 has an innovative propulsion system named Eco-Drive. This is a parallel hybrid system that combines diesel and electric propulsion for long-range motoring and silent electric propulsion.

The boat also has two diesel engines, which can be used for long-range motoring or to generate electricity. The boat is also designed to be safe, with four propulsion devices plus sails and a large solar array.

The HH44 has a number of technical features that make it a groundbreaking eco-friendly design, including:

• 3 types of propulsion: full electric, standard diesel, and sail.
• 4.2 kWh of solar panels: generating power for recharging the lithium battery bank for solar .
• 10 kW electric motors (5kW each): mounted on the back end of each diesel engine for electric propulsion.
• The diesel engines can be used both for propulsion and as electric generators.
• Possibility to use the propellers to recharge the battery while the boat is sailing. Kind of like using hydropower to charge your solar batteries , pretty cool!

The HH44 is also a performance catamaran thanks to its C-shaped §daggerboards. Daggerboards are an essential component of many sailing vessels, providing both vertical lift and increased upwind sailing performance.

This solar powered yacht features up to 4 double cabins and 2 heads . Not bad for this world-cruising vessel!

If instead, you are looking for a larger boat, HH Catamarans also have other models up to 88ft.

This solar catamaran was also the preferred choice of Gone with the Wynns , a popular cruising YouTube channel. Here’s their announcement video:

Where to buy : HH Catamarans .

• A true performance world cruiser.
• Very resilient with 3 different propulsion modes (electric, sail, and conventional engines) and ideal for offshore cruising.
• It can run silently and without causing pollution.
• More affordable than other solar catamarans, starting from $1 mm USD
• Smaller than other options.
• The improved sailing performance requires narrower hulls, which reduces the available space onboard compared to other traditional vessels of similar size

Best mid-range

The Silent 60 is one of the smaller electric boats made by Silent Yachts. It is designed to be handled by at least two people. The users can either choose to include an additional crew or not.

Despite its outward small appearance, Silent 60 is very spacious and can accommodate a good number of people.

Besides, the electric yacht has a beautiful design that adds to its elegant and luxurious feel. It is usually designed with up to 6 cabins , with each cabin offering every basic amenity you need to have a luxurious stay on the yacht. In fact, the electric solar boat is equipped with everything you need to allow you to live on board permanently!

As someone who loves spending time on the water, I was really excited to learn about the Sunreef 43M Eco: a superyacht that is both eco-friendly and luxurious.

I was especially impressed by the solar power system, which is built into the composite structures of the yacht, and the large hydraulic platform which creates a vast walkaround beach club.

The interior of the solar superyacht is just as impressive as the exterior, with a variety of sustainably-sourced materials and fabrics used throughout as well as energy-saving air-conditioning. The Sunreef 43M Eco can welcome up to 12 guests in the most luxurious conditions.

Silent Yachts – Silent 120 Explorer

Here’s another incredible solar super-yacht by Silent Yachts. The Silent 120 Explorer is a truly unique yacht, designed to explore the world in style and comfort.

Powered by solar energy, this solar catamaran is perfect for those who want to enjoy the beauty of the open seas without worrying about the impact on the environment.

With plenty of space for guests and all the amenities you need onboard, the Silent 120 Explorer is the perfect choice for your next adventure. If you’re looking for a yacht that combines luxury and environmental responsibility, the Silent 120 Explorer is a perfect choice.

The company didn’t yet release detailed information, however, this superyacht seems to be even featuring a helipad under the roof’s solar panels!

The Silent 120 Explorer has plenty of room for guests and all the amenities you need onboard. So if you’re ready to embark on your next great adventure, be sure to consider the Silent 120 Explorer, which will likely start being delivered in 2023.

The 100 Sunreef Power Eco

Sunreef recently launched and sold their first 100 Sunreef Power Eco catamaran, a transatlantic luxury craft that takes solar boat design to the next level.

With massive living space, great autonomy, and impressive features like a flybridge that can be transformed into an outdoor cinema, the 100 Sunreef Power Eco is the perfect vessel for cruising in supreme luxury

This catamaran uses the latest innovations in solar power to achieve outstanding energy efficiency, and its ultralight battery bank provides for silent cruising and infinite range.

The fully customizable interior and exterior make this catamaran a truly one-of-a-kind option, and its use of ethically-sourced and eco-responsible materials is sure to please even the most discerning buyer.

If you’re looking for an electric yacht that is both luxurious and eco-friendly, the 100 Sunreef Power Eco is certainly a great option for you if you can afford it!

The most affordable $

The Aquanima 40 catamaran is entirely powered by solar energy. It features creative adaptations and unique innovations that make it eco-friendlier and more economical boat than other solar-powered catamarans. For example, the solar panels installed on the electric catamaran are built in such a way that they can sell any excess solar energy back to shore stations when connected.

The exterior of the Aquanima 40 has an elegant design. Also, the interior is not only aesthetically pleasing, but also very clean and modern.

The boat is designed with 2 single cabins for the crew and 2 double cabins for guests.

Indeed, this solar boat by Azura Marine is one of the most economical and cost-effective options you can go for when buying a solar catamaran.

• Relatively fast.
• Ideal for short vacations.
• The most affordable solar catamaran, starting at about $0.6 million USD.
• Much smaller than other options.
• Not recommended for long cruises.
• Basic looks and layout.

As its name suggests, the Soel Senses 48 is 48 feet long. It has a slender design and is lightweight , making it more economical than most other solar-powered boats.

The boat is designed with two sleeping berths that can accommodate two people each. It also includes a salon that can offer enough sleeping space for four people. 

Compared with most other solar yachts, the Soel Senses 48 has a much smaller size. Its size, adding to its sleek and innovative design, give it faster speed than other solar-powered boats.

It incorporates 12 solar panels installed on the roof ; all these panels generate a combined electrical power of up to 2.7 kWh. The electricity generated by the solar panels is then stored in two batteries which can be easily configured to hold a maximum solar power of 142 kWh.

Like other Soel Yachts, the Soel Senses 48 glides smoothly over water without causing any noise, rattles, or generating fumes.

It has average cruising speeds of 10 knots, even reaching top speeds of up to 18 knots. However, the solar catamaran cannot run at its top speed for long periods.

Both the interior and the exterior of the Soel Senses 48 have a sleek and modern design. Every single component of the solar catamaran has been designed carefully to make it as functional and comfortable as possible. Therefore, when you board on this boat, you can expect to experience one of the best sailing experiences of your life.

The Serenity 64 Yacht features a diesel engine. It is a hybrid solar boat, which means that it can run on either solar power or on diesel.

The diesel engine especially comes in handy when the users wish to achieve faster cruising.

The solar catamaran is a very spacious electric boat and provides plenty of living space. It is built with four luxurious cabins, with each cabin having its ensuite bathroom. And even though the Serenity 64 is smaller than the Serenity 74 model also built by Serenity, it still provided an elegant feel and a smooth sailing experience.

Solar Boats Pros and Cons

The sun is a powerful and free source of energy, making solar power an attractive option for those looking to power their yacht. Solar panels can be used to generate electricity to run the yacht’s lights, appliances, and even the engine. Solar power can also be used to heat water for showers and laundry. But, what are the pros and cons of solar catamarans?

Here’s a quick summary of the solar yachts’ advantages and disadvantages:

One of the main benefits of solar power is that it is renewable and environmentally friendly. Solar panels have no emissions and do not produce pollution. In principle, they also do not require fuel, making them very cost-effective in the long run. Solar power is also very reliable, as the sun is a constant source of energy.

There are a few disadvantages to solar power. Solar panels can be expensive to install, and while they require less maintenance, this can be quite costly, especially when it will come time to replace the batteries. Solar panels also need to be pointing directly at the sun to be effective, so they may not generate power on cloudy days or at night.

But there’s more, let’s see what some sailing experts are thinking about solar catamarans!

Sailing expert’s solar Boat review

Recently, one of the most popular sailing YouTube channels, Saliling La Vagabonde , published a very honest and interesting review of the solar powered yacht Silent 55. Here’s a summary of their experience:

• 7 Days onboard (6 nights)
• Travelled 145nm with an average speed of 7 knots
• Generator used for about 12h (in total)
• Fuel consumed: 208 liters

Here are some interesting observations they made:

• While cruising it may feel less stable than a standard sailing boat because it doesn’t have a sail to stabilize it when hitting the waves.
• For the Silent 55 it was possible to move at about 3 knots by using only the power generated by the solar panels (without using the batteries) on a sunny day. This means that if you are moving the solar yacht around quite frequently, you will end up using the generator quite a lot to produce the necessary power.
• When the batteries are out of power, the Silent yacht is using a (diesel) generator to supply the necessary power to keep the boat moving and to power the appliances.
• A great luxury yacht with all the comforts and going in the right direction for the future of the sector.
• Overall, the Silent Yacht is a great eco-friendly alternative to a power boat , while if you are thinking about cruising around the world, you would be probably better off going for a standard sailboat (or for some of the hybrid alternatives mentioned in this article, like the HH44).

Why are solar yachts all catamarans?

Solar yachts are all catamarans for 2 main reasons:

• Catamarans have a larger surface, which allows for placing more solar panels and also offers more room for the batteries onboard.
• Catamarans have efficient hulls for their size. This reduces their power consumption while moving.

This makes catamarans the ideal platform to build a solar-powered boat.

Modern solar electric boats are undoubtedly an eco-friendly choice in sea travel and a form of green tourism . Not only do these electric boats provide a smooth sailing experience, but they also reduce the release of emissions into the atmosphere, reducing the environmental impact and enhancing sustainability .

Luckily, given their size, solar catamarans can charge themselves (unlike electric cars ), so they can sail indefinitely without the need to stop for refueling.

If you are environmentally conscious and looking to get a boat that is more viable, desirable, and eco-friendly, you may consider investing in one of the solar yachts discussed in this article!

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Table of Contents

You might be surprised by how much the cost of solar panels has decreased in recent years. People sometimes used to think they were too expensive, but now they are more affordable than ever.  

The price of your system will vary depending on your energy needs, the number and type of panels you get, and the cost of local labor, taxes, and other fees in your area. Today, we’ll examine the average price of buying and installing a complete solar system, the federal tax rebate, purchasing options, and ways to lower costs. Let’s get started.

Average Cost of House Solar Panels in 2024

The average residential solar panel or photovoltaic (PV) installation cost for a home in the USA is about $2.86 per watt. This typically equates to between $15,000 and $25,000 before federal and state incentives. The cost of an installed system is cheapest in Arizona at $2.36 per watt and most expensive in Maine at $3.52 per watt. 

Average Cost of House Solar Panels by State

Since the average cost of photovoltaics varies significantly by state, we’ve provided a breakdown of the average costs for 6kW and 10kW systems and the federal tax credit you can expect on a 10kW system. Finally, we’ll explore the average price per watt in each US state. 

How Much Are House Solar Panels?

On average, you can expect to pay about $2.86 per watt or $15,000 – $25,000 for a fully installed photovoltaic system before incentives. However, the actual cost of your photovoltaics depends on several factors: location, the number and type of panels you need , characteristics of your roof and exposure, the price of labor in your state, and more.  

Let’s examine the cost factors further to better understand what your system may cost you.

The laws, permits, and fees on photovoltaic installations vary significantly by state, as do the state-run solar incentives. If you opt to remain tied to the grid or want to take advantage of selling excess energy back to the grid via net metering , if available in your state, there’ll be additional connection fees you must pay your utility company. 

Another major factor determined by location is your peak sunlight hours , or how many hours your PVs are exposed to direct sunlight, where they operate at their maximum efficiency. The lower your peak sunlight hours, the more panels you need to meet your energy requirements. 

Generally speaking, the further north you are, the lower your peak sunlight hours. Alaska has the lowest at 2-3 hours daily, and Arizona has the most at 7-8. Mountainous regions can also vary significantly depending on your location concerning the sun. 

Energy Needs

The typical US household uses 10,791kWh annually, or about 899kWh per month. The size of your home will determine your particular energy needs, as well as appliances, how many people are in your home, whether you own an electric vehicle and other factors. You’ll need to assess your personal household energy usage , as the more energy you use, the more PVs you need, and the higher the price of your system. 

Size, Weight, and Number of Panels

The size, weight, and number of PV modules required will also affect your final costs. Your energy needs, peak sunlight hours, panel efficiency, and other factors will determine the total number you need. Larger, heavier panels will also cost more to install than lighter-weight units since they require more robust racking systems. 

Portable solar panels will reduce your costs since you won’t have to pay for installation. They’re lightweight and can be carried with you if you want to go on an outdoor adventure. However, if you’re looking for something more permanent or have limited space on the ground, EcoFlow’s Rigid Solar Panels are the best option for permanent roof installations. 

The type of photovoltaics you buy will also affect the price. Not long ago, the more efficient monocrystalline panels cost considerably more than less efficient polycrystalline PVs. The higher cost made buying those less efficient panels more appealing since you could get a faster return on your investment . However, the price difference has been decreasing rapidly, so much that nowadays it’s not worth the savings since you need more of them to produce the same amount of energy. 

Monocrystalline

Monocrystalline panels are the most efficient PVs available today. The manufacturing process to produce single silicon crystals for each photovoltaic cell has traditionally cost more. However, that cost difference has diminished significantly in recent years, now costing between $1 and $1.50 per watt, compared to between $0.90 and $1.50 per watt for polycrystalline.

EcoFlow’s Solar Panels , for example, use monocrystalline technology and boast a 23% conversion efficiency, compared to most other major manufacturers, averaging around 20%.  Another critical factor is that these PVs will typically last longer. Thanks to their better temperature coefficient, they perform better in hot climates . Polycrystalline PVs are also more prone to thermal damage in intense sunlight. 

Polycrystalline

Polycrystalline PVs were the most common models for many years. They’re easier to make since they’re not made of a single silicon crystal but of multiple smaller crystals melded together to form a polycrystalline cell. Because they’re easier to produce, they used to cost significantly less. 

However, this initial purchase saving would cost you conversion efficiency since polycrystalline models are only 13-16% efficient on average. That means you’d need to buy more panels to produce the same amount of energy. Nowadays, you can expect to pay between $0.90 and $1.50 per watt, so your savings are small to non-existent. 

Thin film photovoltaics are the least efficient, with an average conversion efficiency of  7-15%. They have the advantage of being highly flexible, allowing installation on diverse surfaces. They also cost much less, around $0.43–$0.70 per watt, making them a popular choice for large commercial arrays. However, they also do not last as long and are not ideal for homeowners wanting to invest in solar. 

Newer options like EcoFlow’s 100W Flexible Panels are a fantastic alternative to old-school thin film models. They’re flexible like the older thin films, but thanks to EcoFlow’s unique technology, they have a much higher conversion efficiency of 23%. These are best used to supplement your regular rigid or portable array, allowing you to maximize your surface area by attaching them to unusual roofs, RV roofs, boat awnings, or other unconventional surfaces.   

Purchasing Options

Your available purchasing options will also affect your final price, particularly if you don’t have the cash to buy your system upfront and require financing. If so, you may be subject to additional fees and interest.

Roof Characteristics

You should also consider the pros and cons of roof installations . Some major factors to consider are the shape and slope of your roof, how much surface area is available, whether or not your roof is shaded for parts of the day, and when it experiences shade. 

These all impact the effectiveness and cost of a roof installation. Older roofs may even need to be replaced before your photovoltaics are installed. EcoFlow’s 400W Rigid Panels are a popular choice for permanent roof installations, maximizing the surface area of your roof and your solar array’s effectiveness. 

The cost of hiring licensed solar installers and electricians varies by state; fees may be lower in states with more installers or less stringent labor laws. 

Make sure you hire a qualified professional since mistakes during installation can be costly. Not all installers offer warranties on their labor or have only limited warranties. Check their reviews on Google and compare installers’ costs, professionalism, knowledge, and warranties; doing a little research could save you big in the long run.  

Solar Panel Installation Costs

Your costs will depend on the size and shape of your roof, the number and type of panels you install, the state you live in, and the rates of your installation professionals. On average, professionally installed systems cost between $15,000 and $25,000.

Your equipment, including panels, inverters, batteries, racking, and mounting hardware, account for about 47.2% of your costs, with additional electrical components for another 7.2%.  

Then there are taxes, fees, permits (8.2%), administration and grid connection fees (12.2%), and labor. Installation labor typically amounts to 12.2% of the total, while electrical labor fees cost another 13.2%. 

If you have the knowledge and skills to DIY install photovoltaics , you can save significantly; just be aware of the risks of DIY installation. On average, DIY installations cost $7,000-$18,000, but you can save around $7,000-$8,000 by doing so.

How Can I Pay for Solar Panels?

If you have the cash to pay upfront, this is the best option since you’ll own your photovoltaics, benefit from state and federal incentives, and not pay interest or fees to financiers. 

Solar Loans

If you lack the cash to pay upfront, you can obtain loans for installing solar systems. Discuss this with your local bank to find out what options they may have. Financing options still allow you to be eligible for incentives. 

Manufacturer Financing

Sometimes, manufacturers also offer financing on their products directly or through third-party lenders, giving you another option to pay for your system over time. 

Solar Leases or Power Purchase Agreements (PPA)

Solar leases are when companies place photovoltaics on your land, and you pay them a fixed monthly fee for their use. These are similar to solar power purchase agreements where someone else installs the equipment on your land, and you agree to purchase power from them. 

These can be good options for people wanting to get into photovoltaics but require more funds to invest. However, be aware of the contract length they want you to sign; this may affect your decision. Also, neither option is eligible for state or federal incentives since you won’t own your system. 

Solar Rebates and Incentives

Many states offer state-specific solar rebates and incentives to encourage people to make the switch. Check out your state-specific incentive programs to learn more. 

Federal Solar Tax Credit

The Federal Solar Tax Credit is a fantastic opportunity to reduce costs by 30%. You still have to pay upfront for your installation, but you get a significant amount back when you claim it on your taxes. This tax credit will remain in effect until 2030, when it will decrease and finally cease in 2035 unless renewed by Congress.

How Can I Save Money on Solar Panels?

There are many ways to save money on photovoltaic systems, including state rebates and incentives, the federal solar tax credit, and net metering . This allows you to return your excess energy to the grid, although it’s unavailable everywhere. 

You can also save money by reducing your electricity consumption to reduce the number of necessary PVs. Consider monitoring your energy usage using apps, running only one major appliance at a time, switching to energy-efficient appliances , and performing regular solar panel maintenance to keep them running optimally.    

Final Thoughts

Buying photovoltaics has never been more accessible or more affordable than it is today. Now that you understand how location, panel type, roof, labor, federal tax incentives, and other factors affect your final cost, you should have the necessary information to start looking into installing EcoFlow’s Solar Panels for your home. Then, you can enjoy the benefits of clean, green, and free energy from the sun!

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