Best Solar Car Battery Charger for Powering Your Vehicle

While solar panels started by providing power to homes and businesses, their application has extended to vehicles. If you are moving to an area with an inadequate power supply, your only option is to get the best solar car battery charger to meet your battery charging needs along the way.

Now, let's review the best units available and the things to keep in mind as you make your choice.

Let's begin!

1. Sunway Solar Car Battery Trickle Charger and Maintainer

Sunway Solar Car Battery Trickle Charger & Maintainer 12V Solar Panel Power Battery Charger With...
  • [Simple and Very Easy to Use]---The solar battery charger panel mounts easily to...
  • [Solar Panel Power up to 1.8W]--This trickle charger will NOT overcharge your...
  • [Stronger and Durable]-This solar powered battery charger is Covered with ultra...
  • [For Any Rechargeable 12Volt Battery]--This solar battery trickle charger is the...
  • [Prevent Reverse Charging]-- With build in blocking diode to prevent reverse...

The best solar car battery charger is the Sunway Solar Trickle charger and maintainer, which you can easily mount to the windshield or dashboard of your car. It connects to the cigarette lighter socket and comes with a suction cup. As a result, this easy to use solar charger won't be a hassle to use.

If you'd prefer to use it with SAE connectors, you can get yourself one, but it'll come at an additional expense. You don't have to worry about overcharging your battery with the Sunway Solar battery charger since it also functions as a battery maintainer. This means that it'll manage your battery drain issues to ensure the longevity of your car battery.

If you think you can only use this charger in direct sunlight, you'll be surprised to learn that it also works on cloudy days. The ultra-clear PV glass covering this charger is designed to increase its efficiency while the ABS plastic build improves its strength.

This item works with any 12-volt battery, not just that of your car. The integrated blocking diode is set in place to prevent reverse charging, while an LED indicator will inform you when your car battery is charging. The package includes the solar charger, a cigarette lighter adapter, and alligator terminal clamps.


  • Easy to install.
  • Easy operation.
  • Durable.
  • Prevents reverse charging.
  • Water-resistant.


  • Hard to disconnect the panel from inside the car.

2. SUNER POWER Solar Car Battery Charger & Maintainer

SUNER POWER 12V Solar Car Battery Charger & Maintainer, 2.4W Waterproof Solar Trickle Charger,...
  • 【Portable & Charge Anywhere】- The solar charger converts light energy from...
  • 【Multipurpose Charger & Maintainer】- The solar powered battery charger and...
  • 【Reverse Protection】- Fully protect the battery! The solar charger will not...
  • 【Waterproof & Hign quality Materials】- Use 30% high conversion efficiency...
  • 【Free Maintenance】- Tempered glass and strong ABS frame, well built for...

Our next pick is the SUNER POWER Solar Car Battery Charger, fitted with amorphous solar cells which can generate current even in cloudy weather to ensure your car battery is well powered. This solar power battery charger is compatible with various batteries, including Wet, Gel, Deep Cycle, AGM, and SLA batteries. This makes it a versatile option that works for cars, boats, motorcycles, RVs, snowmobiles, and trucks.

You can enjoy reverse protection from this solar battery charger thanks to the in-built blocking diode designed to present reverse discharging, draining batteries. This enhances the durability of your car battery, ensuring you won't need to replace it any time soon.

This unit is has a premium strong solar glass cover that can withstand high pressure to prevent physical damage. Additionally, the durable ABS frame is also in place to lengthen the lifespan of this solar battery charger. It's no surprise that this unit is among the best solar car battery chargers on the market.


  • Plug and play installation design.
  • Protection from reverse charging.
  • Durable.
  • Works even on cloudy days.


  • Not fast charging.

3. POWISER Solar Battery Charger

OYMSAE Solar Battery Charger 12V Solar Powered Battery maintainer & Charger,Suitable for Automotive,...
  • [Charge Any Weather]It's amorphous solar panel battery maintainer, which can be...
  • [Charger And Maintainer]This product is a solar battery maintainer and trickle...
  • [Low Maintenance]The interfaces of the product are plug-and-play, It's easy to...
  • [Sturdy And Practical]Weatherproof solar battery charge,The surface of tempered...
  • [Easy To Install]It uses durable ABS engineering plastics , with installation...

In third place, we have the POWISER solar charger, which utilizes high-efficiency solar cells to produce power. It has a portable design which makes it easy to carry around and install. It uses thin-film amorphous silicon technology to ensure it can convert power in any type of weather and environment. Nevertheless, maximum power generation is only possible in direct sunlight.

Overcharging won't be an issue with this charger since it features reverse diodes, ensuring that the battery doesn't drain power at night. This unit has a compact design and is easy to install, making it ideal for cars, trucks, motorcycles, ships, and farm equipment. Its simple plug and play format ensure that you can easily connect it to your car without extra extension lines.

It has a sturdy build which makes it weatherproof to withstand the destructive power of the elements. It's also easy to clean and has high light transmission capabilities.


  • Easy installation.
  • Water-resistant.
  • Weatherproof.
  • Compact design.


  • Takes a long time to charge an empty battery to full charge.

4. SUNAPEX Solar Charger

SUNAPEX 12V Solar Trickle Charger for Car Battery Solar Battery Charger 12 Volt Waterproof 1.8W...
  • 【High Conversion Rate】SUNAPEX 1.8 watt solar battery charger uses advanced...
  • 【Upgraded Built-in Intelligent Controller】With upgraded Intelligent Charger...
  • 【Stronger and Durable】Solar trickle charger 12 volt is covered with ultra...
  • 【Battery Charger & Maintainer】This product is a solar battery maintainer and...
  • 【Easy to Use & Warranty】All interfaces of the solar trickle charger are...

The SUNAPEX solar-powered battery charger is also among the best solar car battery chargers you can buy. If you are looking to convert light energy to power your vehicle's battery, this is an excellent option. This solar panel battery charger uses thin-film technology to charge car batteries in a wide variety of weather conditions.

It comes with an integrated LED light indicator that lights up when the solar panels are active. So, you won't have to guess whether it's working or not. Additionally, this solar trickle charger offers overcharge protection using the reverse charge blocking diode, preventing power from discharging back into the board when you aren't using the car.

Maintaining this unit won't be a hassle since it's weatherproof and uses strong solar energy glass to resist rain, snow, and hail while making it easy to clean. This charger also doubles as a solar battery maintainer to help keep your vehicle batteries in shape. You can use it for car batteries, your boat battery, or motorcycle battery.


  • Works in any weather.
  • Indicates when charging.
  • Extends battery life.
  • Low maintenance requirement.
  • Durable.


  • It's hard to unplug the charging wire from the panel.

5. Topsolar Solar Panel Battery Charger

Topsolar 10 Watt 12 Volt Solar Trickle Charger 10W 12V Solar Panel Car Battery Charger Portable...
  • 【Light, Simple, Durable】 Lightweight and easy to carry. It weighs only 0.75...
  • 【Excellent circuit protection】 Excellent safety circuit is built in the...
  • 【Plug & Play】 Heavy-duty 2.1mm x 5.5mm DC plug with an extension cord. The...
  • 【Applicable to all rechargeable 12v batteries】 As a solar battery charger...
  • 【12-months warranty】 The solar panels you buy are of excellent quality, and...

Last but definitely not least, we have the Topsolar Solar Panel battery charger, a lightweight option that is easy to handle yet durable. It's an awesome choice among solar battery chargers because of its waterproof qualities, making it capable of withstanding rain, snow, and hail.

The junction box contains excellent safety circuit features to prevent overcharging, reverse charging and protect the reverse circuitry indicated by a red light. It comes with a DC plug that has an extension cord. This solar car battery charger comes with complete accessories and features an easy installation process. You don't need advanced knowledge or skill to set it up.

The only thing this unit needs is access to sunlight, and it will conveniently generate power to trickle charge your car batteries. It can work well with any 12V rechargeable battery and is an excellent option to maintain batteries.

This flexible solar panel comes with a 12-month warranty which guarantees that it's a high-quality option that can charge your car's battery at a reasonable price.


  • Weatherproof build.
  • Ease of installation.
  • Durable.
  • Prevents reverse discharge.


  • Gets hot when sitting in the sun.

Factors to Consider When Choosing the Best Solar Car Battery Chargers

1. Types of Solar Battery Chargers

There are two primary types of solar chargers; solar car battery maintainers and solar battery chargers.

  • Solar Battery Maintainer

These products are designed to maintain the charge in your car battery. They keep the battery power at ideal levels to ensure the battery doesn't lose charge. This helps to lengthen the life span of the car battery, which is the first reason people invest in them.

Automotive batteries naturally discharge when they are not in use. So, if you park your car for the season, you'll need to get a battery maintainer. Otherwise, all you'll have by the time you use your car again is a dead battery.

  • Solar Car Battery Charger

A solar car charger is a device used to power up batteries. They are larger and more powerful in comparison to maintainers, and they can recharge batteries to full capacity. These products are great for meeting your battery charging needs when you are far from a power source.

2. Efficiency

The efficiency of solar chargers is a key consideration because they are meant to assist in cutting energy consumption costs. However, these products have different efficiency ratings. The most suitable options are the ones that can still harness solar power even when there isn't direct light from the sun.

These units are designed to power batteries even in cloudy and stormy weather. Unfortunately, they won't generate as much power in cloudy weather as they do when it's sunny. However, they can help keep costs low by providing the power you need despite taking longer than usual to supply it.

3. Power

Car batteries vary in power requirements just as they do in other factors. The amount of power your batteries need should be a determinant of the battery charger you select. This is because a solar battery charger with a low power range will need a lot of time to charge your batteries than one with higher power output.

Unfortunately, the chargers with more power also carry a higher chance of overcharging issues. So, if you'd rather avoid the risk, you can go for a unit with lower power even though you'll have to wait for long before your batteries are full.

4. Reverse Charge Blocking Diode

Since car batteries tend to lose charge over time, it's crucial to look for a charger that can prevent the loss of power. One of the features to keep an eye out for is a Solar Charge Controller, which controls the flow of charge to and from the batteries.

When the charger has a charge blocking diode, you can rest easy since it'll prevent the battery from losing power. This will help preserve the performance of your batteries and will save you a lot of time.

5. Price

Solar battery chargers range in prices depending on the materials used to make them and the specific brand. Some are more affordable than others, but the most expensive isn't necessarily the best fit for you. There are some excellent solar-powered chargers that have a price tag that's below $40. These are lightweight and have a compact design which is why they are affordable.

Those above $40 are high-performance options with various accessories and features that make them more convenient to buy. Some of the additions they could have include overcharging protection, high efficiency, and weatherproofing capabilities. They are the best option for long term charging and maintenance.

6. Size and Weight

Another factor to keep in mind is the size and weight of the unit. Most people get solar panel chargers to supply power as they set out for road trips or camping. This means that it'll be necessary to carry them along the journey. If the unit is bulky and heavy, handling it could be tricky.

You should go for a light enough unit to handle without the hassle and compact enough to store without having to leave some things behind. Nevertheless, if you have abundant space and energy, there's nothing wrong with taking a large solar battery charger. Remember that it's possible to have a powerful but lightweight solar charger.

7. Weatherproofing

The last thing you should look for in the best solar car battery charger is weatherproofing and water resistance. Since solar battery chargers work by converting light energy into electricity, they'll need to be outside the car to access direct sunlight. As such, your solar car battery charger will be exposed to the elements as it powers up.

Factors like rainfall, snow, or hail can easily affect the performance and longevity of solar panels. That is why it's crucial that they have some form of protection from extreme conditions. This means that you should opt for a unit that features weatherproof and waterproof capabilities to ensure it works for as long as possible without getting damaged.

Frequently Asked Questions

1. What is the best solar car battery charger on the market?

The Sunway Solar Car Battery Trickle Charger and Maintainer is the best solar car battery charger in this review.

2. Are solar chargers any good?

Yes, solar chargers provide a means to cut electricity cost since they use renewable energy to power car batteries.

3. Can you overcharge a car battery with a solar trickle charger?

No, solar trickle chargers are designed to prevent overcharging and discharging of batteries. 

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