Becca Lewis is home maintenance writer who aims to foster confidence in and inspire DIY enthusiasts at all skill levels. Becca attended Southern Connecticut State University, where she studied ...

Your best bet, sans solar, is to get a variable voltage lab power supply with a volt and amp meter built in, that goes up to at least 40V. Set it to 40V, connect the battery, and watch the current.

Batteries aren't one-size-fits-all, and neither is the way they're wired to your house. Here's what you should know about AC- and DC-coupling. When we think about solar panels and batteries, we don't ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Tim Heffernan Tim Heffernan is a writer who covers air and water quality and ...