Best way to switch from shore power to inverter?

I installed a Xantrex 2000W inverter and it will pass through power to a 15A circuit on shore power. The circuit I chose to invert was my tv/stereo etc but my fridge is on there also. I always switch to LP dry camping anyway so not a big issue. I had dreams of using my microwave but truthfully I can fire up my Honda 2000 in seconds if I want to reheat food....vs taking a full day to top up my batts with solar. I would like a full house setup but just not ready to do that extra work.