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Composite Flywheel Used by San Diego Gas & Electric

02 February 2001

Beacon Power Corporation, an energy technology company that provides power reliability solutions using high-technology flywheel systems, has installed two Beacon Power model 20C1000 flywheel energy storage systems (FESS) to provide standby power for one of San Diego Gas & Electric's (SDG&E) telecommunications customers, Cox Communications. The flywheel system replaces an existing battery-powered back-up system. Beacon's 20C1000 flywheel is the first non- battery powered back-up system that offers a dependable, long-lasting and cost-effective alternative to lead-acid battery back-up systems. Beacon's flywheel energy storage systems provide highly reliable power via a composite flywheel rotating on near-frictionless magnetic bearings within a vacuum chamber. When primary power is lost, the flywheel's stored mechanical energy is instantly and automatically converted into reliable electrical power, allowing operations to continue without interruption. The 20C1000, designed specifically for the telecommunications and broadband cable industries, provides up to 1.0 kW of continuous electrical power and, at reduced power, can effectively support user operations for 8 to 10 hours. Beacon Power Corporation designs, manufactures, and markets advanced flywheel technology products that provide reliable electric power required by the information economy.