We have found, with reusable ice packs in the freezer, the fridge will stay within safe temps for quite a while. Once, when boondocking, we lost battery power during the night and the fridge wouldn't run, it stayed below 40 degrees for 6 hrs (not opening the fridge/freezer door) until we got hooked up and on the road with tow vehicle power. Good insurance to have those cold packs in the freezer, if you have room. They also come in handy for first aid and for packing a lunch for a day trip away from the RV.
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