Updated March 31, 2019 by Karen Bennett

The 6 Best Waterproof Solar Charge Controllers

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

This wiki has been updated 7 times since it was first published in January of 2019. A reliable solar charge controller will help keep your batteries functioning optimally by regulating the voltage and current they’re receiving from the panels. Here we rate these devices for durability, ease of use, and price, including some waterproof models for use with a boat or RV. For safety’s sake, be sure to hire a licensed installer for the setup. When users buy our independently chosen editorial selections, we may earn commissions to help fund the Wiki. Skip to the best waterproof solar charge controller on Amazon.

6. CPTDCL Regulator

5. PowMr 5A

4. Instapark PWM

3. WindyNation 10A

2. Suner Power CC-12

This item has been flagged for editorial review and is not available.

1. Renogy Voyager 20A

Editor's Notes

March 28, 2019:

All the models featured on our list make use of pulse width modulation technology, which is an effective way of making sure a solar battery charges efficiently. The current from the panels tapers according to the recharging needs of the battery. These types of controllers tend to be both compact and affordable.

The Renogy Voyager 20A made the top spot on our list since it has a lot to offer, including a backlit LCD (which most waterproof selections do not incorporate), and it features an external sensor that allows for accurate temperature compensation. The Suner Power model also receives high marks for reliability, and it’s CE safety certified, with a wide array of built-in protections. The rugged WindyNation is designed for mounting directly on the back of your solar panel, and it’s prewired and conveniently includes the necessary MC4 connectors.

No matter which you go with, make sure it’s compatible with your solar array and the other equipment in your system. In addition, this type of device should always be set up by a licensed installer.

Karen Bennett
Last updated on March 31, 2019 by Karen Bennett

Karen Bennett lives in Chicago with her family, and when she’s not writing, she can usually be found practicing yoga or cheering on her kids at soccer games. She holds a master’s.degree in journalism and a bachelor’s in English, and her writing has been published in various local newspapers, as well as “The Cheat Sheet,” “Illinois Legal Times,” and “USA Today.” She has also written search engine news page headlines and worked as a product manager for a digital marketing company. Her expertise is in literature, nonfiction, textbooks, home products, kids' games and toys, hardware, teaching accessories, and art materials.

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.