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.
we have an auto transfer switch. We are parked with 15A power right now. When I want to use something that will push us over 15A, I turn on the generator. I first turn off all significant loads then turn them back on when the generator takes over. Same thing just before we shut it down. We have been doing this about once per day for the last month and have had absolutely no problems.