Actually as someone who uses a 3.5 CF 120V fridge from home depot, well the idea works fine. Oh that home compressor not working on the boat thing, well mine has been working 5 years. I live aboard and cruise
a bit. I've had it healed over to 25-30 degrees for hours and no problems. OK Most of the time I like the heal 10-15 degrees max as I'm not in that much of a rush
Really there is not that much difference between a 12V compressor and 120v compressor. I find that my 120V compressor uses about the same power as a 12V compressor. The difference is the 12V compressor runs 30-40 minutes an hour and the 120 volt compressor runs about 10-14 minutes an hour, in 2 to 2-1/2 minute chunks.
Oh I do have the fridge bolted down and added a stainless clamp thingy to hold the door closed when healed.
Now a bigger fridge would use more power and for a really large one the amp load at 120V might get excessive. Not sure a Danfoss 80 unit would be big enough for a larger home fridge. This as the insulation
in the home units really are not up to marine use.
If you get a 120V fridge, look for one with the external condenser tubing on the back of the fridge or maybe bottom. That way you could add more insulation
around the box. My little fridge incorporates the condenser in the side panels
so no insulation can be added....
Still all in all it works well as is and saved me a chunk of 12v change