We had a 3.3 cu ft 120v only fridge in the truck camper for a while that drew more like 4.5 DC amps when "on" from inverter. It seems the big fridges use a lot less power than the little ones. Had too much trouble with that fridge, because the TC roof was too small to hold enough solar.
I am ignoring the starting up amps each time, and just looking at the running amps.
So, it seems there is a place for where a big 120v fridge that draws less where it is in an RV with a big roof for lots of solar, and which is in the right latitudes at the right time of year could get away with it.
Needs some actual measurements and details for the scenario to settle the matter for each possible scenario. All up to the individual RVer to calculate whether he can get away with it in his scenario.