Generator only runs with engine on
Onan generator running without issue while to Ford E450 motor is running. Turn the motor off the generator stops running any where between 5-15 mins. The generator will not start off the house/coach...
Forum Discussion
First step is to load check the batteries, free at most auto stores. Because weak batteries can cause various strange and unexpected problems. Your post seems to suggest the engine starts OK on the chassis battery
Yes most/many gens do not generate DC but need DC for say fuel pumps etc. But their AC output is used for the charger to create DC for the batteries and lights etc including the gen that use DC. So engine off, weak battery voltage drops and gen quits as it should. Gen not cranking also suggests a battery problem, charger problem, wiring problem etc.
My guess: The engine alternate charges both banks as it should. There can be a variety of reasons why the house batteries aren't being charged or barely charged and your post suggests the house batteries are not being charged from either the alternator or the gen/charger.
Yes most/many gens do not generate DC but need DC for say fuel pumps etc. But their AC output is used for the charger to create DC for the batteries and lights etc including the gen that use DC. So engine off, weak battery voltage drops and gen quits as it should. Gen not cranking also suggests a battery problem, charger problem, wiring problem etc.
My guess: The engine alternate charges both banks as it should. There can be a variety of reasons why the house batteries aren't being charged or barely charged and your post suggests the house batteries are not being charged from either the alternator or the gen/charger.
