Cape Wind Inks Deal With Siemens Energy

Although it still is awaiting a federal permit to build a controversial offshore wind farm in Nantucket Sound, Boston-based Cape Wind has signed an agreement to buy 130 wind turbines for the project from Siemens Energy Inc. Siemens concurrently announced it will open an office in Boston for U.S. offshore wind projects.

Asked why Cape Wind made the agreement now, before the federal government’s permitting decision, spokesman Mark Rodgers told “We’ve been working hard for the last year to make our selection, and now that we’ve made it, we thought, why wait?’’

Siemens Energy’s parent company, Siemens AG, based in Munich, has a U.S. headquarters in Orlando, Fla. The company’s U.S. Wind Power division has grown from one employee in December 2004 to more than 1,000 employees today.

MA Gov. Deval Patrick praised the development. “The opening of a local Siemens offshore wind energy office is another significant step forward for the clean energy industry we have growing in Massachusetts,’’ Patrick said in a statement.

The model of Siemens turbine that Cape Wind agreed to purchase is an industry workhorse, with 1,000 units sold and 150 units installed and successfully operating, the company said. Each is capable of generating 3.6 megawatts of power. According to the American Wind Energy Association, a megawatt of wind generates enough electricity to power 225 to 300 households for a year.

Globally, Siemens commands more than 50 percent of the world’s offshore wind market. Rodgers told Cape Wind’s decision came down to Siemens or Vestas Wind Systems, based in Denmark.