I am not an electrician but having some knowledge of electrical issues
it seems to me that some of the NFPA codes are getting a little carried
away. I can certainly understand the purpose of ground fault sensors,
especially on outdoor services but from what my son-in-law tells me
(he's a working, state licensed electrician) arc detection sensors and
other circuit protection are now required as well.
I discovered a while ago that ground fault protectors don't work well
with some inverter/battery chargers that use switching power supplies.
When they turn on the first half cycle fakes the ground fault out
causing it to trip. The first RV we had did this and it took me quite a
while to discover the problem. It worked fine on a circuit with no
ground fault detector but when plugged into a protected circuit it
tripped the ground fault every time.
Does your LOCAL electrical code require you to install outlets upside down?