Never did it but was told that if the generator is started when you are plugged into shorepower, a lot of damage would happen. Just wondered if that is true.
Depends on the motorhome? On mine it wouldn't be possible - I have to plug the shore power cord into a socket that runs to the generator to run off generator power. So if I was plugged into shore power and started the generator, it would just run with no load.
I don't know what MH you have but mine comes on when power cuts off and shuts down when power comes back on automatically depending on load. I believe most all have that feature in one form or another whether auto or manual.