Welsh Camper

Depends entirely on what you mean by "fully off-grid" really. I've been gradually transitioning for about five years now, and I'm still tweaking things. My setup started with basics —...

Spot on about voltage mattering. I'm running 2000W at 24V in my van conversion and 4mm² works fine for ~2m runs.

Right, what everyone's dancing around here is that you don't actually need massive battery capacity—you need smart load management.