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.
It's been fine, except for the issue I already described. The build quality is decent, but nothing special. There's a ridge down the middle that's a bit wider than it should be. The display button recedes a bit far into the case and so can get a little annoying to push. It's got some nice rubber feet, and the orange might make it easier to spot in a dark tent. I haven't put it through heavy or methodical testing though. Just mentioning things that I haven't seen mentioned in reviews. It's a heavy item for a backpack, so might be worth reconsidering if it's overkill for your needs anyway.