The generator should produce 120 volts ac and the converter or inverter/charger should be the component to recharge the batteries. Check to be sure the circuit breakers are not tripped or off at these devises. Make sure also there are no blown 12 volt fuses. What kind of voltage are you getting to the coach batteries when plugged into shore power? Are you getting 120 volt from generator into the coach; does the air cond come on? Let us know a few more details where we can be of more help.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7