Xtreme Power energy storage device online at Hawaii wind farm

The project marks Xtreme Power's largest commercial DPR currently in operation

Oahu, Hawaii, March 25, 2011 — Xtreme Power, a manufacturer of large-scale energy storage and power systems, commissioned a 15 MW system on First Wind's 30 MW Kahuku Wind project during a formal dedication ceremony on Oahu.

The project marks Xtreme Power's largest commercial DPR currently in operation, and is the largest battery energy storage system integrated on a wind farm in North America.

Kahuku Wind Power is also the first renewable energy project to be completed under the Department of Energy's loan guarantee program, which supplied $117 million for construction in July 2010.

At the Kahuku site on the North Shore of Oahu, the DPR digitally smoothes the wind farm's output to about 1 MW per minute by rapidly absorbing or releasing power as needed so that Hawaiian Electric Co.'s grid system and local customers are shielded from disturbances due to varying winds at the Kahuku Wind farm.

The site is unique in its transmission challenges that required a storage solution in order to avoid costly transmission upgrades and project delays. Xtreme Power also designed the system with the ability to double its storage capabilities in the same square footage, should First Wind require additional capacity in the future.

The Kahuku project is one of three collaborations between Xtreme Power and First Wind. Dynamic Power Resources are also operating on First Wind's Kaheawa Wind Power wind farm and will be integral to the Kaheawa Wind Power II wind farm, both on the Island of Maui.

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