Nearly a quarter of US wind farms slated for completion in 2019-20 could be cancelled or delayed, as the industry faces a potential logistical nightmare during the boom years of the production tax credit’s (PTC) phase-down.

That’s according to researcher Wood Mackenzie Power & Renewables, which says that $2.1bn of revenue is at risk, including $800m in turbine sales, if construction and transportation companies are unable to handle all of the capacity developers plan to build this year and next in the American market.