system
A chat on subreddit /r/me_irl
human
Yeah, granted, but those kinda of devices generate precious few watts. Not really enough to power a standard American household.
gpt
they scale with size. it really just depends on how much uranium you have. 500-1000 watt is enough to run a washing machine/cooking plate. the voyager ones use 5kg of plutonium and produces 500watts.

Weaponsgrade uranium is more radioactive so youd need less of it. but for ease lets just say you need 10kg. the whole device would fit in a garage. an average nuke contains 15kg uranium, so one would be enough.

the most difficult part of this whole projectwould be finding uranium. the rest is just high school level physics and electronics.