The largest wind turbine in the world is now the Enercon E-126. This super-large wind turbine has a rotor diameter of 126 meters (413 feet). This new wind turbine is officially rated at 6 megawatts, but will most likely produce 7+ megawatts (or 20 million kilowatt hours per year). That's enough to power about 5,000 households of four in Europe. A quick US calculation would be 938 kwh per home per month, 12 months, that's 11,256 kwh per year per house. That's 1776 American homes on one wind turbine.