This captured energy is stored in a flywheel and can be used to provide a burst of power for acceleration, improving the vehicle's overall energy efficiency. This concept was notably used in Formula 1 racing's Kinetic Energy Recovery Systems (KERS). . Flywheel energy storage (FES) works by spinning a rotor (flywheel) and maintaining the energy in the system as rotational energy. When energy is extracted from the system, the flywheel's rotational speed is reduced as a consequence of the principle of conservation of energy; adding energy to the. . Flywheels have largely fallen off the energy storage news radar in recent years, their latter-day mechanical underpinnings eclipsed by the steady march of new and exotic battery chemistries for both mobile and stationary storage in the modern grid of the 21st century grid. Additionally, the demand for real-time data. .
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