Fire up the generator to see if you get proper voltage that way.
Is the Bounder a 30A system or 50A? And what is the power rating where the coach is plugged in?
A poor neutral wire connection can cause a low voltage reading. Are you measuring voltage from the breaker to neutral or breaker to ground? Do both and compare - a difference is a clue.
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL