GE Renewable Energy has completed a 300-turbine wind repowering project for NextEra Energy Resources, adding the equivalent of 75 machines' worth of output and underlining a potential market expected by the US National Renewable Energy Laboratory to grow to $25bn by 2030.

The US industrial giant's Repower programme is calculated to extend the life of onshore wind turbines "by a decade or more", boosting efficiency and reliability while also supercharging performance by up to 25%.