Amerika

Once the preserve of mavericks, hippies and survivalists, there are now approximately 200,000 off-grid households in the US, a figure that Perez says has been increasing by a third every year for the past decade. In addition, nearly 30,000 grid-connected US households supplement their supply with renewables, according to the non-profit Interstate Renewable Energy Council. In the UK there are around 40,000 off-grid homes.

The average UK household uses around 4500 kilowatt-hours (kWh) of electricity annually, plus some 18,000 kWh of gas for cooking, hot water and domestic heating. In the US the figure varies considerably from region to region. For example, households in New York City use around 4700 kWh a year, whereas those in Dallas use 16,100 kWh: there are a lot of air conditioners in Texas. In chillier regions where people use gas for heating and cooking, on the other hand, they can burn up an extra 28,000 kWh or so per household.

New Scientist

Interesting to see. Not as bad as we might have thought. The real problem is the land and energy required to run the infrastructure (emergency services, manufacturing, food production, roads, electric, communications) for a first-world economy.