Wind Power

Energy and Climate Change written question – answered on 13th October 2011.

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Photo of Chris Heaton-Harris Chris Heaton-Harris Conservative, Daventry

To ask the Secretary of State for Energy and Climate Change what the average efficiency of on-shore wind turbines was in each of the last 12 months.

Photo of Charles Hendry Charles Hendry The Minister of State, Department of Energy and Climate Change

We understand this question to mean load factors, rather than efficiency. DECC produces load factors for onshore wind, on a quarterly basis. These can be found for the last four quarters in the following table.

Year/ Quarter Onshore wind load factor (percentage)
2010 Q3 21.9
2010 Q4 25.7
2011 Q1 26.3
2011 Q2 27.0
Note: Quarterly wind load factors are produced on a standard basis, rather than the unchanged configuration basis used for annual load factors. Source: Energy Trends table ET 7.1—available at:

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