"It may have taken a few years, but in many parts of the country the grid is finally catching up with wind energy’s rapid growth,”says Michael Goggin,senior electric industry analyst at AWEA.

On 26 March, new wind output reached 10.29GW at 20:48 local time, 29% of the 35.76GW of electricity being used on the ERCOT grid, a record for any US power system.