Iberdrola is starting work on the United States' first large-scale offshore wind farm. The project will be 25 times the size of the country's only existing offshore facility, located in Rhode Island.

Vineyard Wind 1 will be operated by Vineyard Wind, a company 50 % owned by the Iberdrola group -through AVANGRID subsidiary Avangrid Renewables- and Copenhagen Infrastructure Partners (CIP).

The 800-megawatt (MW) project is located 24 km from the coast of Martha's Vineyard, and will generate enough wind power to cover the needs of 400,000 households. It will also reduce tariffs by $1.4 million in the first 20 years of operation, while preventing the emission of more than 1.6 million tonnes of carbon dioxide per year, the equivalent or taking 325,000 vehicles off the roads. The other offshore wind farm in Rhode Island has 30 MW installed capacity and supplies clean energy to 17,000 homes.