The offshore energy project will have turbines taller than any building in Boston, but they will be barely visible from Martha’s Vineyard.

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.