US utility Xcel Energy has broken cover on plans for a 300MW wind farm in South Dakota that will qualify for just 80% of the production tax credit (PTC), marking the US wind project to confirm it will proceed with less than the tax credit’s full value as the PTC sails towards expiration in 2020.

Xcel – which has more wind energy feeding its multi-state network than any other US utility – says the 300MW Dakota Range I and II project will be operational in 2021 pending regulatory approval, meaning it will likely qualify for the PTC at this year's 80% level, with four years to then reach completion.