Living Off Grid is becoming more and more feasable.
LED lighting takes so little power and SunDanzer makes Fridges and Freezers (chest style...either 5 cu.ft. or 8 cu.ft.) that use Danforth Marine Compressors that run on anything from 12 to 24 volts and can be plugged directly into a Solar Panel....the Fridge requires One (125 Watt as I recall) and the Freezer Two...slick.
The range of 12 volt appliances is amazing....12 volt Solar powered well pumps...pretty much all the basics.
There is even a 12 volt A/C system for boats that could be adapted to an RV pretty easy from what I've seen...
Heat....12 volt Electric Blanket.