We kept the generator (also an Onan) on our boat going all the time we were out... It ran the AC and radar. That thing was rocked and rolled all over the place, and never suffered any ill effects (although I did).
I really don't see hove movement could effect them... just my opinion.
Having said that, I'm not sure about the auto mode. Generators seem to like continuous duty more than a lot of stopping and starting. The generator on the boat went to idle mode when the demand dropped. That's something that I wish that the genset in the motorhome did. Dropping to idle when not under a load would save fuel.
2016 Redhawk 26XD
Me, Dear Wife,
2 Bluetick Hounds
1 Newfoundland / Black Lab Mix
1 Cairn Terrier