Billions of dollars of investment in wind farms over several years have been unable to prevent a “drought” in wind power generation this quarter that has surprised the market and contributed to a squeeze on east-coast gas supplies inflating wholesale prices.

Electricity generation from wind farms in the National Electricity Market since April 1 is roughly flat compared with the same quarter in 2021, despite about 2500 megawatts of wind capacity having been added since then, according to an analysis by electricity market watcher Global-ROAM.