The Lee DeKalb – Battery Energy Storage System is a 20,000kW energy storage project located in DeKalb, Illinois, US.

The electro-chemical battery energy storage project uses lithium-ion as its storage technology. The project was announced in 2013 and was commissioned in 2014.


The Lee DeKalb – Battery Energy Storage System is owned by NextEra Energy Resources (100%), a subsidiary of NextEra Energy Capital Holdings.

The key application of the project is frequency regulation.

Contractors involved

LG Chem and NextEra Energy Resources have delivered the battery energy storage project.

Additional information

The 20-megawatt energy storage system in the Midwest that provides frequency regulation support for customers of PJM Interconnection, the largest regional transmission organization in the U.S. The cutting-edge storage technology includes 2.5 MW of LG Chem lithium-ion batteries as well as four 5 MW inverters and eight 2.5 MW step-up transformers.


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.