The combined capacity factor of all 424 MW of offshore wind in Denmark was 39% in 2005, a year of relatively low winds. Age is no barrier to performance. Some of Denmark's oldest machines from the mid 1980s deliver capacity factors of 35% and more. The turbines with best productivity were a Bonus 2.3 MW unit at a coastal site in Denmark, an NEG Micon 2.75 MW unit in northern Germany and a Windworld 550 kW at Bockstigen off the Swedish island of Gotland. For the full analysis, see the latest issue of WindStats Newsletter.
In an analysis of the performance of 11,000 wind turbines in Germany, Sweden and Denmark conducted for WindStats Newsletter, a sister publication to Windpower Monthly, all the best performing machines are identified as being sited offshore or close to the coast. The highest capacity factor is 45%, recorded by the Vestas turbines at the Horns Rev offshore station. An Enercon 500 kW turbine in north Germany was runner up at 37%. The average capacity factor in Denmark is 24%, compared with a 16% average in Germany.