Hands-on: Ugreen's $1,299 setup takes a few hours to turn sunlight into enough charge to run my refrigerator for hours. When high winds took down power lines and left my family in the dark last March- ...

If there’s one thing I love as much as playing with batteries, it’s charging them up from the sun. And when it comes to my electric bikes, which are kind of outdoor toys by definition, being able to ...