> Shouldn't I just be able to switch the hot side of the 110v circuit?
>
Just switching the hot side and leaving the neutral shared should be fine.
When plugged into shore power the inverter hot should have no potential to
shore neutral, and shore hot should have no potential to the inverter
neutral. I've heard about some people having weird inverter gremlins due to
chassis ground being bonded to shore ground and inverter neutral being (for
some reason) connected to chassis ground, but I suspect the trouble there
was due to installer error. I've run a 1500W "mechanical inverter" (really a
12V motor spinning a 120V generator) for years with a nothing-special
Leviton 3-way switch to switch to shore power on the hot leg.

--
John Bange
'90 Vanagon - "Geldsauger"