Beacon flywheels have been in commercial operation since 2008 and are the result of more than 15 years of product development. There are more than 400 flywheels in commercial operation today and flywheel operating hours exceed 9 million.
Beacon has three commercial plants, operating in three different US Independent System Operator markets, responding with high accuracy to the three different control signals. Our proven flywheel energy storage systems help grid operators in NYISO, PJM and ISO-NE safely and efficiently balance power grid supply and demand to ensure reliability. In the NYISO market, our Stephentown plant is about 10% of regulation market capacity but provides over 30% of the Area Control Error correction, doing so with over 95% accuracy.