I’m only half kidding. I’m a bit of a prepper and I have lots of powerbanks and devices that charge from USB but besides idling my truck I really had no other way to charge any of them in case of a long-term power outage which seemed a bit of an oversight on my part.
Not like this solves the issue. 30 watts (under ideal conditions) isn’t much but it’s a start.
There are power tools that run on batteries these days. I don’t know about you, but a chainsaw seems pretty useful to me.
At 30watts max I guess you can cut a log or two every once and a while sure.