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.
Honestly, I have a Jackery Home power 3600. The electronics have been buggy and unreliable. The battery can discharge itself through connected solar panels. It’s a known issue. The inverter overheats due to its discharging. The panels desynch from the battery while charging regularly. The USB C output is entirely inconsistent. Sometimes delivering minimal charge and other times rapid charging. My little brother has an Eco Flow. He hasn’t had issues with that system the same way that I have with the Junkery. Beware.