I run my fridge on propane while driving, it will run on the inverter power but I'm pretty sure the fridge will use more power than the vehicle can supply in return... Eventually you will run the batteries down..
I made the mistake of forgetting to turn the selector switch to propane instead of auto and 2 GC-2 batteries lasted about 14hrs before the low voltage alarm on the inverter went off... What a pain to try to charge batteries with the gen when you can only run the gen during a 2hr window. Made for a interesting camp with teen age kids that want to charge every electronic device known to man..
