The Siemens Energy 6-megawatt installation on trial at Østerild, Denmark, can produce electricity for 6,000 households. Siemens Energy has begun field testing of its new 154 m rotor for the 6-megawatt (MW) offshore wind turbine in Østerild, Denmark. The SWT-6.0-154 turbine is equipped with the world's longest rotor blades – each blade is 75 meters in length. With a record rotor diameter of 154 meters, each SWT-6.0-154 turbine can produce 25 million kilowatt hours of clean electricity in offshore locations, enough to supply 6,000 households.