Sbourgon,
Your issues are still not clear. Is your fridge shutting down because the GFI is tripping or because the inverter is shutting down due to low DC voltage?
The inverter should continue to run at 12v, 2 golf cart batteries with 120 watts of solar (assuming it is working and getting decent sun) should have no trouble for 3 days unless you are running other high draw gear.
What other things either 12v or 120v are you running off your battery bank?
__________________
Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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