To ask the Secretary of State for Trade and Industry what assessment his Department has made of the operational capacity factor of each wind power installation in the UK for which his Department has given consent under the Electricity Act 1989. (103228)

Industry figures suggest that a modern wind turbine produces electricity 70 to 85 per cent. of the time, but it generates different outputs dependent on wind speed. On average, it will generate about 30 per cent. of the theoretical maximum output over the course of a year.