7 Best Solar Car Battery Charger (Solar Panel) | 2021 Reviews

If you’re RVing across the country on a weeks-long camping trip and want to be connected to power all the time without draining your battery, storing your summer vehicle for the winter and wanting it to be ready to go when the weather warms up, or just an everyday driver who wants to make your battery last as long as possible, a solar car battery charger kit is an essential piece of your vehicle’s equipment.

A good solar car battery charger kit can make a significant difference in the life of your car battery. It can be small and portable, making it convenient to take with you. They’re also extremely potent and long-lasting. They are built to withstand the weather while providing you with nothing but sunlight to recharge your batteries.

We discovered kits that can accomplish all of this and more! We’ve produced a list of the greatest options available on the market.

7 Best Solar Car Battery Charger Kits

Best Overall: SUNER POWER Solar Car Battery Charger

  • Wattage: 2.4 watts
  • Dimensions: 12.0 in. x 8.0 in. x 0.7 in.
  • The High Points: Medium size, features for durability, low wattage (with option to buy more)
  • The Not-So: Less powerful than others, heavy

This alternative appeals to us because of its carefree flexibility. That is what propelled it to the top of our list of the best overall games to play. The SUNER POWER Solar Car Battery Charger is a small device that delivers a significant amount of punch for its size.

Until you realize that low wattage is ideal for a trickle charger, this doesn’t appear to be very promising at first glance. Accidental overcharging of a car battery is a serious issue that must be addressed.

Using a low-wattage charger is an excellent approach to mitigate this risk without having to purchase an additional accessory. For those who are not pleased with the 2.4-watt output, SUNER POWER now provides 4.8-watt, 6-watt, and 8-watt models.

When you combine it with a straightforward design that makes installation simple, as well as durability that exceeds any other choice thanks to the rubber coating the panel’s edges, you have a winner on your hands.

What Do Reviewers Say?

The SUNER Power Solar Car Battery Charger has received a lot of positive feedback. They appreciate the simplicity of having a variety of power alternatives. Different reviewers took advantage of the various power options available at various price points in order to discover the greatest fit for their requirements. But, no matter whatever alternative they chose, they were satisfied.

They also placed a strong emphasis on the long-term durability. Some customers were happy with the strength of the suction cups used for mounting, which were able to withstand rain. Many others have reported putting the charger out in the cold for weeks at a time and returning to find it in fine working order.

Features & Considerations

Remember that this particular solar car battery charger kit is not as powerful as some of the other options available, so keep that in mind when purchasing it. In the event that you need to charge your battery quickly rather than using a trickle charge, this may not be the ideal solution for you.

It is also the heaviest of the items on our list, weighing in at over a pound. SUNER POWER solar car battery charger is nearly three pounds in weight due to the rubber protective coating around the sides of the charger.

It includes four slots into which the provided suction cups can be placed in order to mount the solar energy car battery charger on a flat surface. It might be affixed to a windshield to conserve space, or it could simply be used to guarantee that it remains in the position in which it was initially installed in order to preserve the optimum possible sun angle for driving.

It also includes all of the cords, cables, and wires that you might require to get started. Alligator clips and a cable to connect it to a car’s cigarette lighter are among the accessories included.

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Runner Up: POWOXI Solar Car Battery Charger

  • Wattage: 7.5 watts
  • Dimensions: 14.5 in. x 9.0 in. x 1.7 in.
  • The High Points: Reasonable size, built for durability, strong charge, intuitive to use
  • The Not-So: Heavy, suction cups don’t work that well

The POWOXI Solar Car Battery Charger is ranked second on our list due to its ease of use, thoughtful design, and long-lasting construction, among other factors. You can rely on it to serve as a trickle charger or as a backup for your batteries. You won’t have to be concerned about it breaking while it’s being prepared for usage.

We like that it is of a fair size. It maximizes the size of the solar panel while also ensuring that it is not too large to be difficult to move about with.

Although the rubber bumper that makes this device so sturdy also makes it a bit weighty, this is a blessing in disguise. Over time, this causes it to lose its ability to stay connected when it is suspended vertically by the suction cups.

What Do Reviewers Say?

In their reviews, customers praised the POWOXI Solar Car Battery Charger as their top pick for usage as a battery maintainer during the winter months when they were not driving a vehicle such as an RV or boat, among other things. The fact that it is long-lasting has been recognized by many people. The reason for this is that the solar panel kit is protected by rubber bumpers and is watertight. The result is a product that is weather resistant.

An additional feature that customers have praised about this solar car battery charger kit is its power. 3.3-watt and 7.5-watt variants are available, each with its own set of advantages and disadvantages. Those that chose the 7.5-watt option were happier with their decision. There was a strong suggestion that, for the slight price difference (and we’re talking about a very minor difference), it was far more cost effective to get the more powerful choice.

Features & Considerations

When it comes to car battery chargers, the POWOXI Solar Car Battery Charger is a reliable option that will complete the job and withstand whatever severe weather you throw at it. It operates in the manner of a trickle charger. This indicates that it is intended for long-term use in order to maintain charge.

Despite the fact that it has a power of 7.5 watts, which is not insignificant, it is not intended to charge your battery from zero in a short period of time. The best results are obtained when the device is exposed to direct sunshine. A solar charge controller is also not included with the purchase of this item. As a result, it is critical to carefully check your charge.

Because of its medium size and long-lasting design, it is quite portable. It is, on the other hand, quite heavy, weighing in at more than 2 pounds. That can be a hassle while traveling by car.

The ability to hang it is also affected by the weight of the object. This is due to the fact that the suction cups included in the package, which allow you to hang the solar panel, do deteriorate over time and must be replaced.

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Best Mid-range Option: Sunway Solar Car Battery Charger

  • Wattage: 3 watts
  • Dimensions: 13.9 in. x 5 in. x 0.5 in.
  • The High Points: Unique design, medium power, reasonable price
  • The Not-So: Hanging mechanism is weak

The Sunway Solar Car Battery Charger is a cost-effective choice that meets all of the requirements while also being environmentally friendly. It offers all of the things we look for in a vehicle. There are several of these, including a plaster bumper around the solar panel, a built-in hanging mechanism, and a low enough power that there is no need to worry about overcharging while yet providing effective trickle charging.

The Sunway Solar Car Battery is one-of-a-kind in terms of its shape and size. As opposed to the more usual wide rectangular shape, this solar panel has a longer rectangle shape. As a result, it is a more efficient design to have on a dashboard because it blocks less of the windshield.

Weight-wise, this solar car battery charger kit is relatively light in comparison to other options. In terms of weight, it is in the center of the pack when compared to other solar chargers, weighing less than a pound and a half and measuring less than an inch thick.

Despite the fact that it is lightweight, hanging it may not be as simple as it appears. This is due to the fact that this option only includes two connection places for the suction cups that are offered. As a result, when compared to other models, it has just half the grip.

What Do Reviewers Say?

Many of the folks who tried and loved the Sunway Solar Car Battery Charger did so in a range of vehicles, just like many other reviewers of other goods did so. Tractors and 4x4s were among the vehicles available, as was the more typical mode of transportation, the car. Because of its distinctive design, they discovered that it is ideal for mounting inside a car without taking up too much space.

Reviewers also noticed that it held up exceptionally well in adverse weather conditions. Even after spending several hours outside in a thunderstorm, it continued to perform as predicted. This is one of the few solar car battery charger kits on the market that is genuinely completely waterproof. (It may not be necessary to submerge completely, but rain should not be a problem.)

Features & Considerations

This solar vehicle battery charger kit provides everything you need to get started with solar car battery charging. Everything from alligator clips to a connection to the cigarette lighter in your automobile is included.

It goes above and beyond the basics, mounting the solar panel in a plastic frame to help prevent warping and including a long cord that can be threaded out of the vehicle even when the doors are closed, thanks to the cord’s flexible rubber stripping, which allows it to be threaded through closed doors.

The fact that this choice only has two connection points for hanging makes it impossible to install this item using the hanging mechanism that comes with it, despite all of its excellent qualities (suction cups). Having said that, this is a good mid-range alternative because the hanging mechanism is the most significant trade-off you make in exchange for a more reasonably priced device that performs on par with more expensive models.

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A Budget Option: NOCO Solar Battery Charger

  • Wattage: 2.5 watts
  • Dimensions: 9.2 in. x 9.2 in. x 0.6 in.
  • The High Points: Small size, very affordable
  • The Not-So: Not very durable

Our favorite budget alternative is the NOCO compact but strong solar battery charger, which offers a surprising amount of power for its small size. Read on to learn more about it. This device provides outstanding value for money, as it costs around two-thirds of the price of comparable options without compromising too much in terms of quality.

It’s small in size, measuring only nine inches by nine inches, which makes it easy to move around and much easier to install and then forget about once the job is through. Because it only consumes 2.5 watts, it is completely safe to leave the NOCO Solar Battery Charger plugged in without giving it a second thought, allowing it to keep your battery charged around the clock without causing any damage.

What Do Reviewers Say?

This compact but powerful solar battery charger from NOCO delivers a lot of power for its size, which is why it is our favorite budget alternative. At approximately two-thirds of the cost of comparable alternatives, this product offers an excellent value for money without sacrificing too much in terms of quality.

It’s relatively little, measuring only nine inches by nine inches, which makes it easy to move around and even easier to install and forget about after it’s done. Because it only consumes 2.5 watts, it is absolutely safe to leave the NOCO Solar Battery Charger plugged in without giving it a second thought, allowing it to maintain your battery around the clock.

Features & Considerations

The NOCO Solar Battery Charger is characterized by its small size and high efficiency, and it certainly lives up to these characteristics. It is possible to maintain batteries of many different sizes using a basic 2.5 watt solar charger, and it will perform admirably.

Something to keep in mind is that because of the small size of the panel, it is even more critical to ensure that it receives plenty of sunlight, which might be challenging due to the short length of the chord that comes with the panel. It may take some time and effort to get the NOCO Solar Battery Charger into the most advantageous position, but once you’ve done so, the NOCO Solar Battery Charger will perform admirably.

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Mr. Reliable: ALLPOWERS Solar Battery Maintainer

  • Wattage: 18 watts
  • Dimensions: 16.5 in. x 11.0 in. x 0.1 in.
  • The High Points: Reliable, easy to use, simple, light
  • The Not-So: Unprofessional appearance, warps easily

When it comes to the ALL POWERS Solar Battery Maintainer, the greatest advise we can give you is, “Don’t judge a book by its cover.” This solar car battery charger kit may not appear to be very spectacular, but what it is capable of is rather remarkable.

The ALLPOWERS Solar Battery Maintainer is a large, but not overly heavy, device that is simple to set up and operate. All of the pieces necessary to connect it to your battery are included, and while it does come with four suction cups to mount it, the panel also has four slots, one on each corner, into which a screw could easily be inserted to mount it, which may work even better than the mechanism that is included.

Mr. Reliable is the name we have given this solar car battery charger kit because it is a solar car battery charger kit that can be relied on. Its output is a not-so-humiliating 18 watts, and due of its vast surface area, simply putting it outside in the sun will get it up and running in no time at all.

What Do Reviewers Say?

The ALLPOWERS Solar Battery Maintainer routinely receives positive feedback from customers who say it functions “as intended.” So far, so good, and what they have to say just strengthens our belief in its performance potential.

Their general satisfaction with its speed and output was based on the intelligent inclusion of the blocking diode to avoid reverse discharge as well as a silicon sealant to keep out moisture. The only bad feature that came up in a few separate encounters was the lack of internal mounting for this panel, which renders it prone to warping when exposed to extreme temperatures.

Features & Considerations

Because it does not come with a plastic or rubber mount/lining to support it, the ALLPOWERS Solar Battery Maintainer differs from some of the other options available on the market. Due to the fact that it is freestanding, it can either be an advantage or a disadvantage depending on where you intend to use it.

In the event that you’ll be mounting it to a surface, it will lay flat and may be placed quickly and easily to provide a minor aesthetic enhancement to your vehicle. Using the solar vehicle battery charger on a more temporary basis may need mounting the panel to something more secure in order to avoid a situation where the panel bends and breaks due to heat or wind.

It also has an IP65 water and dust resistance rating, which means that it is entirely dustproof and can survive a little amount of water splashing on it. Although it is not waterproof, a few drops of rain will have no effect on it.

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The Powerful Choice: TCXW Lightweight Solar Panel Kit for Car

  • Wattage: 30 watts
  • Dimensions: 20.5 in. x 13.0 in.
  • The High Points: Powerful, lightweight
  • The Not-So: Large, difficult to transport

If saving energy is your top priority, the TCXW Lightweight Solar Panel Kit for Car is the best option available. Although it’s over double the power of the next-most powerful option on our list, the TCXW company does offer some even more powerful options, with selections ranging from 60 to 100 watts. These solar panels have a lot of power for their size.

An additional feature that we appreciate about the TCXW Lightweight Solar Panel Kit for Car is how lightweight it is – it is the second lightest option on our list, weighing slightly more than 1 pound, which makes it extremely easy to pick up and position. Lifting the solar panel onto the roof of your RV with one hand or shifting it around an inch to get the best sunlight possible is possible because of the lightness of the solar panel itself.

Unfortunately, despite its light weight, this solar vehicle battery charger has a quite wide surface area, with the longest edge over 2 feet in length, and it is also quite fragile, which makes transporting it a little more difficult. Because of the power of this kit, we also recommend purchasing a charge controller to use with it in order to protect your battery from being overcharged when using it.

What Do Reviewers Say?

Almost single reviewer who has used this product has been blown away by how rapidly it charges. Solar panels are not always powerful enough to charge batteries quickly, and it might take hours, if not days, to fully recharge them. This model is capable of accomplishing the same thing in a matter of hours.

A number of reviewers have pointed out that if the panel is exposed to the sun for an extended period of time on a non-flat surface, it is prone to distort. This can be easily remedied by placing the panel on a flat surface, but over time, the panel’s structural integrity may be compromised as a result of the frequent bending. Other options include mounting it to a level surface to ensure that it remains consistently flat over time.

Features & Considerations

The huge surface area of the panel makes it ideal for capturing the greatest amount of sunlight and, thus, the greatest quantity of energy. One disadvantage is that it is difficult to carry due to its size, which makes it an undesirable option.

In addition, it’s crucial to realize that, with a solar panel producing so much electricity to a battery that can only handle so much, having a charge controller is essential for protecting your battery. Due to the fact that this solar vehicle battery charger kit does not contain one, and because it is already on the expensive side, getting it up and running will be time-consuming and expensive.

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For Those That Like To Experiment: SUAOKI Solar Car Battery Charger

  • Wattage: 18 watts
  • Dimensions: 16.5 in x 11.0 in x 0.1 in
  • The High Points: Super light, lots of options of where to mount and use because of simplicity and power
  • The Not-So: May warp with sun, large

The SUAOKI Solar Car Battery Charger is unusual among the products on this list because of how simple it is to set up and use in a range of settings. As a result, the title “For those who enjoy experimenting” was given to the book. Despite the fact that it just comes with the bare essentials, it is an excellent alternative for individuals who want to customize their solar panel so that it may be used in a variety of locations or for a variety of purposes other than simply trickle charging their car battery.

Because the SUAOKI Solar Car Battery Charger has an output power of 18 watts, it is powerful enough to charge a wide range of gadgets and batteries, making it extremely versatile in terms of application. It is also large enough to receive sufficient sunlight to allow it to operate at that capacity on a constant basis.

All of that being said, because this solar car battery charger kit is simple and comes with few bells and whistles, it may require a little extra effort to get it up and running. Even though it comes with suction cups to aid in installation, it is susceptible to warping in the sun due to the heat, therefore it is probably best to put it on something flat and sturdy instead of using the suction cups to help with mounting.

What Do Reviewers Say?

The SUAOKI Solar Car Battery Charger was put to good use by the reviewers, who were inventive in their applications. They frequently went beyond using it as a car battery charger and put it to use as an RV battery charger, a boat battery charger, and even a motorcycle battery charger, stating that it performed admirably in all of these diverse settings.

Additionally, they stated that they had added everything to the panel, from a longer extension chord to a wood frame, all in order to make it as simple and effective to use as possible. Whatever you decide to do with yours, this is a device that is capable of handling any situation.

Features & Considerations

In addition to the suction cups that are included for mounting your SUAOKI Solar Car Battery Charger, it also has four eyelets in each of the four corners for additional security. These are small enough that if the suction cups do not work for mounting, but you do not want to make any significant changes to the panel, four little screws can be put to secure it in place instead.

This solar panel is also the lightest on this list, weighing less than a pound, making it the most portable. Consequently, its weight will not be a limiting factor in terms of installing it, despite its enormous size.

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The Complete Solar Car Battery Charger Kits Buyer’s Guide

What Makes a Good Solar Car Battery Charger Kit for You

Although many solar car battery charger kits have a lot in common, there are also some things that differentiate them. Paying attention to the small features that vary in quality and usage is just as important to decide which is best for you as is considering the aesthetics and practical usage of the solar panel.

Where are you taking the solar car battery charger kit?

Car camping, a remote road journey, on a boat, as a backup battery starter in an emergency, with your RV… the possibilities are unlimited!

And that also means that the number of possible needs combinations is virtually limitless. However, we may categorize the requirements as follows: items that must be used outside and those that will most likely be utilized inside the car unless it is sunny.

For example, if you plan to use the vehicle battery charger kit outside, it should be waterproof and dustproof, as well as equipped with other safeguards to ensure that it doesn’t simply fall apart when it gets wet or dusty.

You should also evaluate if it will be exposed to the elements for extended periods of time when mounted to something or not. It is possible for certain solar panels to warp if they are exposed to a hot surface for an extended period of time (as well as heating up themselves), so selecting one that will not warp if it is not mounted should be a top concern.

How much space do you have?

If you answered “a little,” the following is what you should do:

Because of the limited amount of available space, you’ll need a little charger, but you don’t want it to be so small that it isn’t effective.

Efficiencies in charger design and functioning are your best friends, especially if they include both aspects of efficiency in design and functionality.

Chargers that include some form of added function that makes them fit better, such as suction cups for fastening the charger to your windshield so that you can maximize space, are considered efficient in their design. The most efficient solar panels in the smallest amount of space would be the most powerful solar panels in the smallest amount of space.

If you answered “a great deal,” here’s what you should do:

If you have the room, you might as well take advantage of it by purchasing the solar car battery charger that will provide you with the maximum power.

In terms of shape, there are a few possibilities that are thin and wide, which allows them to optimize the amount of sunlight that they get and so be significantly more effective. If you have the necessary room, this is an excellent option.

If you fall anywhere in the middle, here’s what you should do:

Those who are able to combine efficiency in design and practicality while taking advantage of the small amount of extra space available can choose the choice that best combines the two; however, keep in mind that you may have to pay a premium for this option.

In terms of physical dimensions, here is a brief description of the products on our list, taking into consideration both their physical dimensions and their weight.

What other features might be useful?

Some of the solar bar battery charger kits offer a few extras that make them stand apart from the rest. Those features are:

  • Waterproof
  • Dustproof
  • Charge controllers
  • Other connection options
  • More color options
  • Rubber-lined edges to resist bumps and falls

The different solar car battery charger kits on our list offer a few different combinations of these features and sizes to make sure that there is a choice that best fits your needs.

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Selection Criteria: How We Ranked the Best Solar Car Battery Charger Kits

When we looked into several solar car battery charger kits, we discovered that there were many different types of kits. Each kit had a unique assortment of items, and the solar panels and hook-ups itself functioned in a unique manner.

One type is user-friendly and comes equipped with everything you need, requiring little to no maintenance, while another is more of a starting point for building a more sophisticated battery charger. While some designs are enormous and are intended for permanent or semi-permanent installation, others are small and are intended to be transported.. Some kinds promote high power, while others rely on trickle-charging to achieve the same result instead.

As you can see, there is no such thing as a solar car battery charger kit that is universally applicable. There are a few factors, however, that we believe are essential in any kit, including the following:

  • Power (measured in watts)
  • Size (including both weight and dimensions)
  • Durability
  • Ways to mount
  • Ease of use

The Basics

There are some of these things that are self-explanatory; for example, we always recommend goods that are simple to use and constructed to last. When taking these variables into consideration, we look for evidence of design that have been carried out with the client in mind from the beginning.

For example, we like solar vehicle battery charger kits that include everything that clients need to start charging their batteries right immediately, without the need to purchase any additional elements that increase the complexity or cost of the whole product. Specifically, this includes kits that feature both a connection to a cigarette lighter as well as alligator clips, as well as kits that do not require the use of a charge controller to function.


When talking about power, we have watts in mind. Here is a breakdown of the products on our list in terms of their wattage.

Although there are merits to both higher and lower wattage, in this case, for the sake of simplicity and what is necessary for a trickle charger, we actually tended to generally favor lower wattage kits, while reserving higher wattage ones for special situations.

Other Factors

Some of the other factors that we considered were size (favoring smaller, more portable panels when possible) and ways to mount (if there is an included system in the kit or not). In general, any kit on this list will get the job done in all of these categories; it is just a matter of which is the best fit for your situation.

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Frequently Asked Questions (FAQ)

What is reverse discharge protection and how does it work? Is it necessary?

When utilizing a solar charger of any size, reverse discharge prevention is essential, especially if you want to leave your device (whether it is a car or a cell phone) connected to the charger for an extended period of time. When the solar panel isn’t actively charging, for example, because the day has turned cloudy or the sun has set, it ensures that the power that the panel has converted for your device does not leak back out into the environment (discharge).

A blocking diode is employed by the charger in order to accomplish this task. In general, current will always flow from a high voltage to a low voltage while the voltage is high. Essentially, a blocking diode is a small electronic component that blocks current from going back into the solar panel.

Despite the fact that many more complex solar panels are equipped with charge controllers, a blocking diode is sufficient to prevent reverse discharge in a relatively simple equipment such as a car battery charger.

What is overcharge protection and how does it work? Is it necessary?

What a blocking diode does not accomplish, which a charge controller will, is prevent overcharging of the cell phone battery. Overcharging a battery occurs when it receives an excessive amount of electricity all at once, which can cause harm to the battery. Charge controllers help to regulate the amount of voltage that is output at one time, which helps to prevent this from happening.

Trickle charge panels do not require the use of a charge controller, which is a solid rule of thumb. For every 50 battery amp hours, these panels (which constitute the vast bulk of the panels on our list) often provide less than 2 watts of power per panel. In circumstances when the output is greater than that, you’ll need to be extra cautious to ensure that your solar panel does not overcharge your battery by overcharging it.

How do I connect the panel to my car?

By far the most simple method of connecting to your vehicle is through the 12 Volt auxiliary connector (commonly known as the cigarette lighter). The majority of solar vehicle battery charger kits contain a plug that is compatible with the port, which makes plugging it in a snap. It is important to note, however, that in some cars, the ignition must be turned on in order for the charger to work.

The other alternative is to directly connect your car’s battery to the alligator clips that come with the kit. Alligator clips are also included in the majority of the packages. In this case, both options are equally effective, and the choice you ultimately choose should simply be the one that is more convenient for you.

What is trickle charge and why is it useful?

The majority of the chargers on our list act as trickle chargers, rather than fully charging your battery from the beginning of the charge cycle. The reason for this is due to a combination of factors.

Firstly, trickle charging is considered a maintenance strategy; this is what you are aiming for: to keep your battery running rather than having it restarted. This is due to the fact that it takes a significant amount of energy to restart a car battery, and most of us would like not to get to that stage. It also helps to ensure that you are maintaining a steady charge on your battery, and that you are not overcharging it or letting your battery to entirely discharge itself.

In addition, it is crucial to understand that practically all solar chargers operate in this manner – they perform best when they are charged slowly over time. In general, unless it is integrated with its own battery, a solar charger will not be able to convert enough power all at once to jump start a battery. The trickle charging feature, on the other hand, is particularly useful for charging small amounts of battery power as you constantly utilize small amounts of it.

As a result, employing a solar-powered automobile battery charger is a precautionary action. Because of its trickle charge, you are unable to run.

out of battery when you need it.

Can I use this solar panel with any other devices?

Yes. The majority of these solar car battery charger kits are really advertised for use with a variety of small vehicles, including cars, motorbikes, small boats, recreational vehicles, snowmobiles, and other similar vehicles, among others.

To ensure compatibility, it is critical to examine the output of each unique one, as well as the specifications of the individual motor to which you will be attaching the solar panel. However, the vast majority of the solar car battery charger kits described on this page will also work with other small vehicles in general.

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