April 9, 2007

Suzlon signs 88 MW wind turbine deal with Tierra Energy

Wind Turbines Will Power Two Tierra Wind Power Projects in Texas and Wyoming

On Friday, March 30, 2007, Suzlon signed a contract with Tierra Energy of Austin, Texas to
provide 42 units of the S88-2.1 MW wind turbine for projects located in Wyoming and Texas.
The agreement expands Suzlon’s customer base, while also showing the turbine supplier’s
acceptance in a proposed project-based financing.

“We are expanding our base in three ways; by signing with a new wind partner, by extending
our project locations westward, and equally important by working towards project-based
financing for Suzlon turbines,” said Andris Cukurs, CEO of Suzlon Wind Energy Corporation,
the Chicago-based sales and service subsidiary of Suzlon Energy A/S of Arhus, Denmark.

“We are thrilled to extend our customer base and welcome Tierra Energy to the Suzlon
family,” said Per Hornung Pedersen, CEO of Suzlon Energy A/S.

The turbine agreement includes the supply of twenty-eight S88-2.1 MW wind turbines sited
for the Ocotillo Windpower Project near Big Spring, Texas. Representing Suzlon’s westward
expansion and the first wind power project for Suzlon in the state of Wyoming, the remaining
14 turbines are designated for the Happy Jack Windpower Project located near Cheyenne.
Suzlon will also ensure the effective operations, maintenance and service of the wind turbines
for a period of five years.

Tierra is focused on the development of a diversified portfolio of over 1,000 MW of both wind
power and natural gas-fired power projects in California, Idaho, Texas, Wyoming and other
locations throughout the United States.

“Tierra is excited to join Suzlon in bringing two new wind projects to the market,” David
Marks, president of Tierra Energy, said. “These projects demonstrate Tierra’s commitment to
renewable energy and to the continued build-out of our development pipeline.”

Both projects will take delivery of S88 wind turbines in Spring 2008. The Happy Jack Wind
Farm will be Suzlon’s first wind power project in the state of Wyoming, and as part of the
project’s warranty agreement Suzlon will include OMS (Operations, Maintenance & Service)
representation in the Cheyenne region.

“These are very exciting projects for us,” said Leif Andersen, VP of Sales for Suzlon Wind
Energy Corporation. “It’s great because we have expanded our partnership base for 2008
and shown that Suzlon products are more than balance-sheet financed; they’re reaching an
acceptable level for project financing, too.” 

Contact Us

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