Still having charging problems 2004 Newmar

Bad or discharged house batteries and possibly the same condition on the chassis side. If nothing is helping to charge batteries when the engine starts up the Alternator is going to try and take on all that load. By nothing helping I am referring to the coach not being plugged in or the generator being on so they can feed the batteries thru the inverter charger. Be sure the inverter does have a charger and if so be sure it is working.