Flywheel Energy Storage

Basic Technology Characteristics Cross section of a flywheel module. Courtesy of Stornetic.
How it Works:	Rotating mass stores rotational kinetic energy.
Benefits:	Fast response time High power capability
Challenges:	Low energy capacity High self discharge rates
Technology Variations:
Applications:	Power quality, frequency regulation, wind generation stabilization; high energy flywheels are being developed for longer duration applications.
AC RTE Efficiency:	85-90%
Cycle Life:	>100,000 cycles
Technology Readiness Level (TRL):	7 - Deployed
Installed Capacity:	~60 MW