I have a 30 amp RV.
When 50 amp is available and I feel the need, I just plug the shore power cord into the 50 amp supply with the dogbone adapter
I plug another 10 ga extension cord into the 30 amp supply with a dogbone adapter to 20 amps. The 110 power to my converter/inverter is split with plug and socket. I plug the converter/inverter into the 30 amp supply cord.
The Converter/inverter supplies independent power to my washer dryer, microwave, water heater, TV console are and a couple wall outlets. The rest of the AC supply takes care of everything else including the 2 AC's with also are part of the Energy Management System.
This has worked extremely well for the last 8 years of fulltiming.
I can run both AC's and they don't even cycle because there is no other measurable draw from their circuit.
