Solar panels use sunlight to generate electricity, but they can do it around the clock, even when the sun isn't shining. Here's how.

(This is called the triboelectric effect, and it's the reason electrostatic dust filters work. It's also the ... the race to bring electricity into the home was well underway.

So we know grounding is important, but how does it work? Why does connecting to ... The Earth (ground) has a potential of ...