I have my doubts that the following is a good idea, so I'll put it out for opinions from those that are a lot more knowledgeable about marine electrical topics than I am. I really do not need AC into my boat except for instances of running power tools. Batteries are maintained by the engine alternator when motoring in/out and a by a 15W solar panel. In order to extend zinc life, and for peace-of-mind when away from the boat (the AC wiring and grounding has been around for a while -- a thorough inspection and upgrade as necessary is on the to-do list), I'm not connected to shore power when its not needed. Recently I washed down all the accommodation area, refinished all the interior the wood trim/paneling/floor, washed my interior upholstery, and soaked the foam cushions in bleach. To slow down the formation of new mold and mildew, I'm thinking that I will want to have a small marine space heater in the boat next winter.So here is the question: Can I by-pass the boat's AC system and power the space heater directly from the shore AC? An adapter would be necessary of course and I would install a GFI receptacle in-line. I think that the weak link in the idea is that if someone was to make contact with the live current, then a proper ground to the boat might be important. The ground from the shore receptacle might not do any good?Look forward to comments/opinions.regards,