Inverter Output
I am going to install an inverter. According to the Kill A Volt meter,the refrigerator draws 88 watts AC. How much would it draw at 12 volts?
Forum Discussion
If you haven't got the inverter yet, look at inverter/chargers. Once you have the inverter drawing down the batteries to run the fridge, you will need some way to put it back faster then the built in converter. I am hoping you have 250-300+ AH of batteries, or you could be seeing a fairly deep DOD overnight in hot weather (higher duty cycle of the fridge).
