We camped alongside my sister with propane-fueled generator on 5th wheel with two A/Cs running 100% of time (very hot weekend). They went through most of their 2 X 40-pound tanks which required us to refill. They traded for a motorhome that takes generator gasoline from 80-gallon vehicle tank (about 60 gallons useable) and now run 4 kW Onan and their single A/C through the weekend without any concerns of running out of fuel. They are much happier and feel salesperson sold them propane generator for previous 5er by exaggerating generator propane fuel economy. I ran numbers for them using Onan specs and propane fuel usage was as it should have been.
Before deciding, I’d run the numbers based on your tank size and intended generator use. Running A/C for long periods can use a lot of propane.
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