Electrical?

I'm still waiting to hear of a case, whereas an RV genset was trying to parallel itself with the power company. Trying to do so at random and maybe with being 180 degrees out of phase, would probably cause it to remove itself from it's mounting ...lol. Nope, don't think it's gonna happen, folks.
At the same time, I wouldn't want to trust these workers for wiring up something wrong, so would probably go ahead and disconnect, until I was sure.