The world’s biggest offshore wind farm was officially opened today after record-fast construction in the middle of the Irish Sea. The 102 turbines of the two connected Walney wind farms cover an area of 73 square-kilometres and were formally connected to the National Grid in a ceremony today. With a capacity of 367.2MW, the huge project can provide low-carbon, green electricity to 320,000 homes. The generating capacity of each turbine, supplied by Siemens Wind Power, is 3.6MW, and the rotor diameter of the turbines is 107m for Walney 1 and 120m for Walney 2, with a maximum height of 150m from sea level to blade tip.