I've got a battery bank in the grey box under the fridge. It powers the fridge, TV, vent, amplified antenna, Espar and some lights using 12 volts with 2 inverters. I hung a 2,800 watt Onan generator underside of the van, right behind the rear axle to power the AC and the microwave. And I did everything myself with a little help from some friends.So, do you run your truck at night for a/c or have inverter? How does that work?