12 volt AC....Arctic BREEZE

[K9_SPRINTER]

Im setting up a MB sprinter for pet transport. I have 3 8D batteries. I already have a 110 AC , and a 12v engine driven AC(engine must be on). Im looking for a 12v AC that runs from battery only(engine off w/no inverter) Im looking for info (good or bad) on battery only AC units such as Arctic BREEZE Truck AC for cabs.