I would try to run the fridge on 120VAC since I presume electricity is part of the camping fee. If electric should be separate, or if your fridge and other appliances are too much for the 15AMP 120VAC, then I'd switch the fridge to gas.
Gas use by a small 3-way is really very little. And I think those refrigerators are a little more efficent on gas.
What you do not want to do is try to cool your fridge using DC current. 1) it's very inefficent, doesn't cool well, and 2) it'll burn through one of your batteries in 2-3 hours.
Steve B. wrote:
I'll be at a campsite for a few nights with only 15 amp. service. I have a small 3-way fridge, and just will run a couple of lights (12v), maybe computer. Wondering if it makes a difference to run fridge on battery or not - is there a difference in the power draw? I'm not sure how many amps a small fridge draws. I could also run off propane if necessary.