Wiring existing 110 outlet to inverter.

I have both a whole house inverter and a dedicated inverter for my refrigerator. I installed a Magnum Energy 15 amp transfer switch for the small inverter so it could supply power to the refrigerator outlet or main power could pass through and supply power to the same outlet. In my opinion it is easier than running a whole new circuit. The transfer switch will get installed next to or behind the main power panel. The existing wire from the breaker controlling the refrigerator circuit will get moved from the main power panel to the transfer switch. A new short jumper wire will be added between the transfer switch and the circuit breaker from which you just removed the wire. Then plug the transfer switch into the inverter (this may require an extension cord depending on where your inverter is located). By doing it this way, there is no need to fish new wire to the back of the refrigerator and no need to move the refrigerator plug between receptacles depending on which power source you want to use. The only thing that has to be fished is the extension cord between the transfer switch and the built in receptacle on the inverter.

Here is the transfer switch I used: http://www.magnum-dimensions.com/sites/default/files/MagDocs/64-0064-Rev-A-CSW-TS15-Web.pdf