How long can the magnetic levitation flywheel energy storage battery store energy
240KW/400KW industrial rooftop - commercial rooftop - home rooftop, solar power generation system.
(Some forms of KERS use electric motors, generators, and batteries to store energy instead of flywheels, in a similar way to hybrid cars.) Photo: The cutting-edge G6 flywheel developed by NASA can store and release kinetic energy over a three-hour period. Photo by courtesy of NASA Glenn Research Center (NASA-GRC).