The 6 Best Waterproof Solar Charge Controllers
This wiki has been updated 3 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 recommendations, we may earn commissions to help fund the Wiki. Skip to the best waterproof solar charge controller on Amazon.
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.