The US had record 41.8GW of wind capacity under construction or in advanced stages of development on 30 June, a 10% increase from a year ago, as developers rushed to complete projects to capture maximum value from fading federal tax credits, according to latest American Wind Energy Association (AWEA) figures.

The production tax credit (PTC), which has underpinned the wind industry since 1992, will sunset at the end of this year.