Xcel Energy, which has more wind on its system than any other US utility, detailed plans on Thursday to add 1.55GW of new wind capacity in the upper Midwest by 2020, all of it qualified for the full production tax credit.

The plan includes 750MW of projects Xcel proposed last autumn and 800MW of new proposals – including the 600MW Crowned Ridge project in South Dakota, which is being developed by NextEra Energy and would be the largest wind farm ever built in the state.