Researchers at Imperial College Business School compared 20 years-worth of wind speed data with performance figures from the UK’s turbine fleet.

The study found that Britain’s oldest onshore turbines – installed in the 1990s – are still producing 75% of their original output after 19 years of operation and are on course to operate effectively up to 25 years.

“This is comparable to the performance of gas turbines used in power stations,” said Imperial College.

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