When I installed my residential refer last year, I wanted it to run on an inverter while we traveled to and from destinations. I also thought it would be nice to power a couple of fans and TV while boon docking when traveling. The easiest solution was to power my electrical load center using the inverter through a transfer switch with shore power. This also brought up a couple of concerns that has already been mentioned in previous posts.
To solve the issues with converter and high load issues were quite simple. I wired in a 20Amp electrical outlet to the shore power side of the transfer switch through a 20A fuse. I plugged my converter to that electrical outlet so it is only powered when on shore power. Next, for high loads such as ACs, Water heater and microwave. I wired in a 4 contact, 40A relay used in HVAC systems that receives its power through the same 20A receptacle. I then ran the hot wire to each device through the relay so those devices will only energize when on shore power and not on inverter.
Took about half a day to wire everything in and so far I'm very happy with it.