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.
If you weren’t using your Steam Deck all-out during the day then probably. Steam Decks draw about 29W max (the LCD models I have at least).
Factorio GPU demands are fairly low, CPU will be maxed out by late game though…