What batteries are looking at? I really don't understand how you could have enough battery AH for the fridge if it won't accept the current from a 400 Watt solar array, maybe 20 Amps or so. (Isc X Voc)
I have 4 GCs that will yield supposedly 484 AH. The theoretical C20 charging rate is 96.8 Amps. (484 X 20%) I have my Xantrex inverter/charger set for 96 Amps.
My 420 Watts of battery seldom provide much over 20 Amps, about a 5th of max charge rate.
If I were to run a residential fridge in our rig (the plan if/when the Norcold gives up the ghost) I'd add more panels to give us somewhere around 600-750 watts total. I would also consider adding a couple of AGMs and feed them separately with a couple of panels and inverter.
