The Beacon Power-Hazle Spindle – Flywheel Energy Storage System is a 20,000kW energy storage project located in Hazle Township, Pennsylvania, US.

The electro-mechanical energy storage project uses flywheel as its storage technology. The project was commissioned in 2014.


The Beacon Power-Hazle Spindle – Flywheel Energy Storage System was developed by Beacon Power.

The key application of the project is frequency regulation.

Contractors involved

Beacon Power has delivered the energy storage project.

Additional information

This 20 MW plant is comprised of 200 Beacon Power Series 400 flywheels that provide frequency regulation services to grid operator PJM Interconnection . Beacon flywheels recycle energy from the grid in response to changes in demand and grid frequency.
This project is funded by Department of Energy, Office of Electricity – ARRA Smart Grid Demonstration Program with $24,063,978.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.