First Big U.S. Offshore Wind Farm Offers $1.4 Billion to Customers

Massachusetts electricity users will save about $1.4 billion over 20 years from the first commercial-scale offshore wind farm in the U.S.

Avangrid Inc. and Copenhagen Infrastructure Partners, joint developers of the 800-megawatt project south of Martha’s Vineyard, expect to provide power and renewable energy credits for 6.5 cents a kilowatt-hour according to a letter Wednesday from the state Department of Energy Resources.