"Pentadyne designs, manufactures and markets clean energy storage systems using a high-strength advanced carbon-fiber flywheel to ensure power quality and continuity for mission-critical operations at industrial, commercial and military facilities in North America and abroad. Integrated into UPS systems -- with or without battery-based energy storage -- Pentadyne flywheel systems provide an economic, long-lasting, low maintenance, lightweight and environmentally sound back-up power solution without any hazardous chemicals or other safety concerns. Pentadyne clean energy storage systems are available via leading OEM distribution partners Emerson/Liebert in North America and Socomec in Europe and Asia. "

http://www.pentadyne.com

anyone looked at this? you can actually buy one these machines