In the coming months, 62 turbines, each up to 850 feet high (taller than any building in Boston) with blades about 350 feet long, will be planted on a sweep of seabed 15 miles off Martha’s Vineyard, the island where former Presidents Barack Obama and Bill Clinton have vacationed.
Cables carrying electricity created by spinning rotors will land on a beach in Barnstable on Cape Cod and then head to consumers in the state. Vineyard Wind says its machines will crank out enough power to light up 400,000 homes.