What is the capacity of the generator? Does it put out over 6KW at 220volts.
I'm thinking you may be loading it down and tripping low voltage protection or thermal breakers.
2015 38RL with MORryde IS, residential fridge, DW, washer and dryer, generator, and slide in slide. 2 A/C, 1 HP and a fireplace. Added 17.5 inch wheels. Follows a 2013 Ram dually diesel with 8' bed and Reese 20K.