I've stayed in a 12v house. Totally off grid, on an island. Juice supplied mostly by wind
, solar added later (basically if you don't have one, you'll have the other). The wind
was the real workhorse, in a gale we could waste electricity, otherwise it was mostly conserved for the water
pump (from West Marine) because hand pumping water and carrying it to the house sucked. Fridge and stove ran on propane
, lights were used sparingly (unless wind was over 25kts). There was a bank of batteries(golf cart, I think) in the basement. Lots of kerosene lamps and candles for back up. Very low tech, nothing fancy, much less luxurious than the average modern cruiser, but totally comfortable and adequate. Hot showers were only available on sunny afternoons when the miles of black plastic pipe on the shed (Okay, oversized outhouse) got warmed up. Took my dad 3 years of vacations to get it so you could flush the toilet. I remember baths there being the ultimate luxury. Everything had to be brought by boat and then a 15 mile hike.
So with LED 's and other recent advantages, I'd say no problem, although for a better all electric
kitchen I bet you'd want 48V. It would be better for inverter
for AC loads too. I' m no expert, plenty electrical
engineers on CF I'll let them take over.....