And when you compare LPG to electricity, I'm not sure if the cost balance is that bad- and I know my battery has more than enough storage to drive all day without charge to run my fridge.
I my last RV (campervan) I had a AC fridge with Inverter. (3,3 cubic)
Do get that thing to work as long as I want - 3-5 days - parked in the shade - I needed roughly 3 kwh of storage. + a little bit of extra storage for the other conveniences. I had 200w of solar - but, since I camping during the winter in florida - in the shade - they are not doing that much.
That was $1000+ in batteries alone. The inverter runs at 95% so with a DC fridge it wouldn't be that much less.
With my 6 cubic absorption fridge in my new RV I'm going through maximum of $50 of propane year (including water heater, cooking and furnace)
That's a 20 year Return on Invest. (1000/50)
Many campgrounds have included hookups - where I don't care if the absorption fridge takes 6kwh a day.
Why DC fridge? No gas.
No need for leak detection, no need for CO alarm (I have electric stove), no worry that my absorption fridge will burn down my camper.
Former fire fighter here, most fires are electric
sorry. Nr. 1 cause of RV (and residential) fires - is electrical, number two (with a large distance) is the Refrigerator.
And many times, the fridge burns because of electrical and not the propane side.