[Dennis4809]

Looks like to much of a draw for your batteries. You have two batteries each at 108 ah but that’s at 6vdc. Connecting them in series to give 12 vdc means you now have 108 ah total available. Since your draw is at around 5 amps, in 10 hours your use around 50 ah or about 50% of your available. Also since you don’t want to use more than about 50% of our batteries without damaging them, it looks like you’re good for about 10 hrs of refrigerator.