i have like two dozen solar panels on an extended fire engine that i'm in the process of converting to a mobile base, to explore more of the world. i also spent a good amount of time looking for MP3 players and such with light batteries to recharge.
adding the solar panels was vital in transformation, as welding with the Integrated Toolset requires bionic power. i could also use gasoline, but since that's not replenishable...
i should also note that the fire engine, named "Storage Mode", has an autoclave on it as well. running that thing takes a lot of power, so my dozen or so solar panels are necessary for making me even more of a bionic nightmare.
thing's also stuffed with literally as many storage batteries as i could get my hands on, i don't think there's a single tile lacking one that could have one. it takes like, a week to fully charge that thing? i have no idea anymore. it just charges so fucking fast i don't have to worry about it.