Originally Posted by GypsyR
This thread has got me wondering now. My generator cranks off the chassis battery. I know this because when the chassis battery got run down I could start neither the generator nor the engine without using the "boost" button and my well-charged house batteries.
So is my coach wired wrong? It's been around the block a few times so anything could have happened. Wouldn't be the first wire I'd have found in the wrong place. But does it matter?
No, some are wired that way but they also have some kind of house to chassis charging device. The Lampert L 45, or something like that, is often used.
Most RV installed generators don't have charging systems and depend on a 120 volt device for charging. Simply done if running off the house batteries.
On the older RVs with diode isolators, not relays, charging was accomplished with the Lambert device sending a charge from the house battery to the chassis battery.
The house batteries will charge as they are now, from converter/chargers or inverter/chargers.
As long as you have a way to keep the chassis batteries charged, you can use them for running the generator.
Yes, even diesel generators use power to run the safety shut down circuits.