no power when generator is off

nodigg wrote:
I have a problem for you to help me solve. When I run the generator or un plug from shore power I sometimes have no available battery power to the coach. It as if the battery dis connect switch is on.

Having 12v part time is not the 12v on/off switch unless there is a wire loose. Do you have 12v all the time, when on shore power? Do you have 120v when running genny? May be your ATS. If ATS is working, then this sounds like an intermittent relay or auto resetting cb at the batteries. The 12v systems should act the same on genny as it does on shore power.