Initially a lot of the Fuzions were coming with the residential fridge, looks like they are now going the other way or at least offering the propane/electric as well. A residential fridge and a tow hauler would seem to be at opposite ends of the plausibility spectrum. As far as batteries, I think the two six volt batteries in series is the least you want to go. Out here, my dealer doesn't sell them any other way. I bought a Fuzion from Holmans in 2010 that had a single 12V. After one camping trip, I was in buying two sixes. The nights are cold here even in the Summer, heater runs all night long.
