Wire Inverter to split receptacle?

hedge wrote:
I recently installed an inverter to run a coffee maker, so far i've been just using an extension cord but that's a bit cumbersome.

I don't really want to cut a hole to install a dedicated plug so I was thinking of wiring the inverter to an existing receptacle and split it so one side would be shore power and the other side inverter power.

Seems pretty straight forward, just not sure of the grounds? would it be ok to tie them together in the box?

When I first installed a 1000 watt PSW in our rig for the same purpose I ran it "whole house", plugging the trailer's main service cable into the inverter, but after a few uses decided I'd much rather have dedicated receptacles in conveniently located areas of the camper. Like you, I first did consider splitting the existing duplex receptacles but was concerned the inverter's floating neutral output may cause issues if it's ground was bonded to the trailer's receptacle grounds. Ultimately I decided it preferable to to keep the two systems separate and instead installed Speed Wire Receptacles that would be wired directly from the inverter - one each side of the bed and a third at the galley. Since I had installed the inverter (10 pics) in the front pass through storage compartment running cable to the bed receptacles was easy. To get to the galley I determined the best way was to run along the underside of the trailer and then up to the galley location so I ran that section of Romex through protective electrical tubing I bought at Home Depot. Worked like a charm - to use all I do is turn on the inverter with the remote which is located inside the camper and plug into the appropriate dedicated inverter receptacle.