Updated December 19, 2019 by Rafael Perez

The 10 Best Solar Car Battery Chargers

video play icon
Best High-End
Best Mid-Range
Best Inexpensive

This wiki has been updated 9 times since it was first published in August of 2018. The electrical charge in 12-volt batteries slowly depletes over time, so if you have a car, ATV, boat, or RV that sits unused for long periods, you'll need to keep the battery topped off. One of these solar chargers can do it without adding to your electricity bill. They help extend the life of your battery, and some are equipped with USB outlets for powering mobile devices, too. When users buy our independently chosen editorial picks, we may earn commissions to help fund the Wiki. Skip to the best solar car battery charger on Amazon.

10. TCXW 30-watt

9. Mighty Max 10 Watt

8. Sunway Multi-Function

7. Powereco 18-Volt

6. Suaoki 18-watt panel

5. Suner Power BC-12W

4. Sunway Solar Portable

3. Schumacher SP-100

2. Battery Tender

1. Eco-Worthy 20-Watt

Editor's Notes

December 12, 2019:

Added the Schumacher SP-100 and the Suner Power BC-12W.

When deciding on a solar battery charger, it is important to consider your particular needs - specifically pertaining to the model's total output (this will be more relevant if you're going to use it on large or deep-cycle batteries) and its functionality in cloudier regions.

But also very important is the cell material. Most consumer solar chargers use either monocrystalline or polycrystalline silicon as their photovoltaic component. Polycrystalline is more common due to several technological and economical factors but monocrystalline is more efficient at converting solar energy into electricity. Models like the Eco-Worthy 20-Watt and the Sunway Solar Portable use the less efficient polycrystalline silicon while models like the Battery Tender and the Schumacher SP-100 use high-efficiency monocrystalline. Schumacher claims that the SP-100 is built using monocrystalline but the its panels have a blue hue that is normally associated with polycrystalline so this does warrant some skepticism.

Batteries are dangerous and should be handled with care to avoid personal injury or damage to your vehicle's electrical systems.

Rafael Perez
Last updated on December 19, 2019 by Rafael Perez

Rafael Perez is a doctoral candidate in philosophy at the University of Rochester. His primary focus is the metaphysics of time and the philosophy of mind, with a particular interest in artificial intelligence and antirepresentational models of the mind. He has extensive experience as a mechanic, a construction worker, and a general repairman. This has allowed him to gather a wealth of knowledge on automobile repair, auto parts, carpentry, masonry, welding, and the tools used in those trades. In his spare time, he enjoys playing guitar, woodworking, and fishing.

Thanks for reading the fine print. About the Wiki: We don't accept sponsorships, free goods, samples, promotional products, or other benefits from any of the product brands featured on this page, except in cases where those brands are manufactured by the retailer to which we are linking. For more information on our rankings, please read about us, linked below. The Wiki is a participant in associate programs from Amazon, Walmart, Ebay, Target, and others, and may earn advertising fees when you use our links to these websites. These fees will not increase your purchase price, which will be the same as any direct visitor to the merchant’s website. If you believe that your product should be included in this review, you may contact us, but we cannot guarantee a response, even if you send us flowers.