Westmill Solar Cooperative built the UK's first and largest solar farm, located next to an existing wind farm. The 30 acre site has 20,000 solar panels that generate 4.5GWh per year, reducing CO2 emissions by 2,000 tonnes and powering 1,400 homes. The £16.5 million project was financed through over £5 million in share sales to 1,650 cooperative members, who receive an estimated annual return of 9-11% from renewable energy subsidies and power purchase agreements.