A community group purchases a large wind turbine (33 metre rotor diameter, 50 metre tower) with a rated capacity of 330 kW.
Say that including planning, installation and connection, a new turbine cost around £500,000 to set up (refurbished turbines are cheaper but not eligible for FiT income).
Installed in an exposed location with strong wind speeds, that turbine could produce 700,000 kWh per year. All the electricity is exported to the grid. From 1 January 2017 the generation tariff for wind power at this scale is 3.51 pence per kWh and the export tariff is 4.91p per kWh.
The community can expect to receive:
700,000kWh x £0.0351/kWh
700,000kWh x £0.0491/kWh
|Less annual maintenance
expense (5% of capital cost)
|Total annual income||
The turbine will have paid off the initial cost in about 15 years, and could generate profits of around £170,000 over a 20-year period (more if it continues for longer). For more advice on community renewables, see How do I set up a community renewable scheme?