If you have a three-way fridge, how about operating off propane? Then the amp draw in negligible.
I’d only have propane hooked up when stopped. If you get into an accident with propane connected, the results could be disastrous.
What kind/size fridge do you have? I have an electric Novacool 2.4 cf fridge — that thing takes very little juice. I have only a single battery that I charge via the outlet before I leave, I run it nonstop, and the 100 AH battery lasts 4-5 days before I need to recharge.
