U.S. BATTERY MAKER SUPPLIES CHINA GRID

A123 Systems to Supply Energy Storage System to Ray Power for Frequency Regulation in China; System Designed to Showcase Lithium Ion Battery Energy Storage as a Fast, Accurate and Clean Resource for Facilitating the Increased Integration of Renewable Energy Generation onto China's Power Grid

July 20, 2012 (A123 Systems)

“A123 Systems (Nasdaq:AONE), a developer and manufacturer of advanced Nanophosphate® lithium iron phosphate batteries and systems…will supply a 2MW grid energy storage system to Ray Power Systems Co. Ltd., a Chinese company focused on developing the [potentially big Chinese] frequency regulation market…[The company believes this initial effort will lead to many others]…”

[Eldon Mou, CEO of Ray Power:] "The project in China will be designed to validate the technical capabilities and benefits of energy storage as a fast-ramping, accurate and clean resource for providing frequency regulation service…Limited overall system ramping capability has created renewable integration issues as well as potential risk of grid instability because of the high penetration of renewable generation, particularly in northern China. A123 Systems has demonstrated the viability and reliability of its product…[W]e expect this project to showcase energy storage as a valuable resource for meeting China's growing frequency regulation demand."

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