https://www.linkedin.com/pulse/flywheel-energy-storage-system-market-industry-analysis-kashid-pertf/?trk=public_post_main-feed-card_feed-article-content FES systems Market work by spinning a flywheel at a high frequency and storing energy in the form of rotary energy in the device. As a result of the energy savings concept, when the energy is captured, the speed of the fly-rotational wheel is reduced; adding additional power to the device causes the fly-wheel speed to increase. Modern FES systems are often composed of composites of high-performance carbon-fiber rotors suspended by magnet bearings and revolving in a vacuum atmosphere at speeds ranging from 20,000 to over 50,000 rpm.