April 21, 2010

Suzlon Celebrates One-Year Anniversary of Oregon Wind Farms

Turbines totaling 400 MW of capacity hit high performance over 12 months

Chicago: Suzlon Wind Energy Corp. announced the one-year anniversary and outstanding
performance at four Oregon wind power projects that came online. Horizon Wind Energy
and Iberdrola Renewables have each hosted two of the Suzlon wind farms that were the
first Suzlon S88-2.1 MW turbines installed in the Pacific Northwest last year.

“We are proud to be marking the one-year anniversary of our Oregon projects as they’ve
surpassed an average 97 percent availability throughout the first year,” said Andris
Cukurs, CEO of Suzlon Wind Energy Corp. “In 2010, we are growing our business with
both Iberdrola Renewables and Horizon Wind Energy in the Pacific Northwest and look
forward to delivering even more high-performing wind farms.”

“We have been pleased with Suzlon’s performance over the past year and hope to see
continued excellence in availability,” said Terry Oswald, director of operations for
Horizon Wind Energy.

The four projects involve 190 Suzlon S88-2.1 MW turbines, which contribute 400 megawatts
of power generation capacity to Oregon’s almost 1,758 megawatts of installed wind power.
In the U.S., 400 MW of wind energy can power an average of 140,000 homes. A fifth
Oregon wind farm, Star Point in Moro, Ore., was finished recently, increasing to 28 percent
the percentage of wind power generated in-state by Suzlon turbines.

Oregon, which ranks No. 6 in the U.S. in installed megawatts of wind capacity, also is
planning to add more. In the coming year, Suzlon’s presence in the Pacific Northwest will
increase with the development of Leaning Juniper in Arlington, Ore., an Iberdrola
Renewables wind farm and Horizon Wind Energy project at Kittitas Valley Wind Farm in
Kittitas, Wash.

“Suzlon continually has shown us a commitment to its turbines,” said John Martinez,
regional director of operations at Iberdrola Renewables. “The turbines have
performed exceptionally well since the start of commercial operation.”

The four Oregon projects exceeding 97 percent average availability include Rattlesnake
Road and Wheat Field in Arlington, both hosted by Horizon Wind Energy; and Pebble Springs
in Arlington, and Hay Canyon in Wasco, both hosted by Iberdrola Renewables. The recently
commissioned fifth Oregon wind farm, Star Point in Moro, is also owned by Iberdrola
Renewables.

Contact Us

Murlikrishnan Pillai
Tel: +91 (20) 67025000
E-mail: ccp@suzlon.com