Beacon Power Corporation, a development stage company, engages in the development and commercialization of flywheel energy storage systems to supply frequency regulation services to the electricity grid in North America. Its flywheel technology stores and recycles energy on an emissions-free basis; and provides frequency regulation and energy balancing services for the electricity grid, utilities, and distributed generation and renewable energy markets. The company offers Smart Energy Matrix, which comprises an array of 10 Smart Energy 25 flywheel systems providing 1 megawatt of energy storage. Its Smart Energy 25 flywheel system includes the flywheels and their associated power electronics. Beacon Power Corporation was founded in 1997 and is headquartered in Tyngsboro, Massachusetts.