Payback can be achieved in as little as 5 to 7 years, says Windsave, one of the new up-welling of companies selling wind power technologies for the home. They make the point that this low payback takes into account getting grant assistance and also the strength of your local average wind speed. But it’s not expensive to get involved. Their WS1000 system will set you back around £1500 fully installed.

The system is rated to give about 1KW at the ‘industry standard’ nominal wind speed of 12 meters per second, and will generate fine over a range of about 4 - 15 meters/sec. The average UK wind speed is reckoned to range from 4 - 10 meters/sec.