We have a Challenger 38" 2017. In our old Class C rig, our refrigerator ran off of propane when we were on the road. In this rig, we have a residential refrigerator and our options are nothing, inverter or generator. We can run for a good long while with nothing, but when the temp inches up beyond 40, I use the inverter. If people
are complaining that they need to charge their phones, we run the generator, which kills two or more birds with one stone.
I liked the old setup of the refrigerator running off of propane, however that fridge was so shallow, it didn't ever stay really cold, except overnight when NO ONE touched it. Several openings/closings and it was hard to get it below 45 degrees, even when plugged into shore power. This refrigerator stays much colder, however, the inverter has been inconsistent... While traveling, it keeps the refrigerator cold overnight, but then when we parked the rig and left it during the day for 2 days, we came back and the inverter had shut off or tripped off or something. Annoying! Next time we are in for service, we will try to find out why the dang inverter kept shutting off.
Also, we have found in both of our rigs, the generator uses hardly any gas. It's noisy, but it's dependable.
FYI, on our last trip, we smelled gas twice while driving. We now try and remember to just shut off the gas at the valve when we are not using it.