The Green Mountain Energy Storage – NextEra-BESS is a 10,400kW energy storage project located in Somerset County, Pennsylvania, US.

The electro-chemical battery energy storage project uses lithium-ion as its storage technology. The project was commissioned in 2015.


The Green Mountain Energy Storage – NextEra-BESS is owned by NextEra Energy Resources (100%), a subsidiary of NextEra Energy Capital Holdings .

The key applications of the project are frequency regulation and renewables energy time shift.

Additional information

In 2015, NextEra Energy Resources commissioned the Green Mountain Battery Energy Storage System, a 10.4 MW facility located in Pennsylvania operating in the PJM frequency regulation market.


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.