Vestas believes the answer to the world's energy needs is "blowin' in the wind." Vestas Wind Systems and its subsidiaries manufacture and sell land-based and offshore wind turbines used to produce electricity. In all, Vestas has installed about 54,000 wind turbines in more than 70 countries. Besides installation, Vestas, the world's largest manufacturer of wind turbines, also maintains more than 21,500 turbines with a capacity of 38,000 MW, for customers that include more than 200 energy and utility companies. Vestas has served EDP Renováveis, E.ON, and in the US, Enel North America and Noble Environmental Power. Vestas generates more than 50% of its sales in Europe and Africa.