I met a couple in 1986 who were off the grid. It was rural Kentucky and prohibitive to pay for an electric hook up. I'm sure off-grid schemes and technology have greatly advanced in 20 years
They had the house wired with 12 volt marine fixtures and bulbs. Had a 12 volt TV. Had a propane refrigerator. Had a generator to run power tools now and then. Had solar-electric cells but I forget how big
Sounds like an ideal situation for solar.