RM1350 Refrigerator

Question for anyone using the RM1350 Refrigerator for dry camping. Does it use a lot of battery power? Have a new San Antonio with this refrigerator and with only that running it seemed to discharge the batteries excessively. I know it runs basically on gas but there is a circulating fan which runs quite constantly off the battery but I am told that doesnt draw much power. Something was drawing down the batteries and that is the only thing I can find that was running except for an occasional light.

Prior to a recent trip, I ran the RM1350 off battery for 48 hours while the rig was at the storage lot. There was not enough power left to operate the hydraulic front landing jacks. That's prior to installing the external circulating fan on the back of the 1350.