What Turbine?

The next step is to think about what size of turbine might be required. Our annual electricity consumption is about 120,000 kWh, so a machine that will generate that amount of power seems appropriate. There is a UK Government website that links to a database of average windspeeds for the whole country. It only gives a very rough guide, and works to an average for each square kilometre based on grid reference. Personal experience and anecdotal evidence also suggests that it tends to over-estimate wind speeds. This is the link: http://www.decc.gov.uk/en/content/cms/what_we_do/uk_supply/energy_mix/renewable/explained/wind/windsp_databas/windsp_databas.aspx.

However, using that as a guide, and working with a target output, we are looking at turbines with a nominal power rating of 50 to 100 kW.