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.
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He said it was for a long-term power outage, not the literal apocalypse.
But even in the case of the literal apocalypse, with the grid permanently down, solar panels can last decades. I see no reason not to have something like this.