Originally Posted by Campin Cajun
I was told by Frieghtliner that only the house batteries charge while on shore power. I tend to believe it because when I first start the engine after it's been sitting awhile I get the low battery warning.
I used to get that too all the time until they replaced my switch and now it's all good. PM me if you have more questions and I may be able to help with how and what they fixed for me.
It is normal though that for the first minute after start up to see you voltage gauge go up and down and get the low voltage warning intermittent. It will do this because the coach is running through a series of diagnostics that require higher battery usage. But before you start the coach, the voltage warning should never be on but mine would be or even dead where the coach wouldn't start...