Using solar power for ironing while camping (Image: Hollandse Hoogte/Eyevine)

“I HAVEN’T paid an electricity bill since 1970,” says Richard Perez with noticeable glee. He can afford to be smug. While most of us fretted over soaring utility bills this year, he barely noticed. Nor is he particularly concerned about forecast price hikes of 30 to 50 per cent in 2009.

Perez, a renewable-energy researcher at the University at Albany, State University of New York, lives “off-grid” – unconnected to the power grid and the water, gas and sewerage supplies that most of us rely on. He generates his own electricity, sources his own water and manages his own waste disposal – and prefers it that way. “There are times when the grid blacks out,” he says. “I like the security of having my own electricity company.”

Perez is not alone. 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 number has also risen in recent years due to escalating house prices and now to more expensive home loans, both of which have driven buyers far from conventional utility networks in search of properties they can afford.

For people who live off-grid, self-sufficiency means guilt-free energy consumption and peace of mind. “It feels brilliant to use clean, free energy that’s not from fossil …