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. Opening the new £1 billion wind farm, Secretary of State Ed Davey, said: \"Britain has a lot to be proud of in our growing offshore wind sector. Our island’s tremendous natural resource, our research base and a proud history of engineering make this the number one destination for investment in offshore wind. \"And Walney is the newest, biggest and fastest-built jewel in that crown, providing clean power for hundreds of thousands of households. \"Opening Walney during my first week in office lets me underline my commitment to continuing the Coalition’s work to make this sector a success story for the British economy, not least with the innovation it is driving and the employment it is creating.\"