Renewable Energy Systems Americas Inc. (RES Americas) will build two grid-scale energy storage projects outside of Chicago that are slated for completion in 2015.
RES Americas will develop and construct the two 19.8 MW energy storage systems, each having the ability to store 7.8 MWh of energy. The first project, Elwood Energy Storage Center, will be located in West Chicago and the second project, Jake Energy Storage Center, will be located in Joliet.
Construction is expected to begin on both projects this winter with completion by August 2015. The projects are expected to operate for at least ten years. RES Americas acquired the projects during the development phase from Glidepath Power in September of 2014.
The projects will both provide real-time frequency regulation service to the PJM Interconnection ancillary services market and are interconnected to the local Commonwealth Edison (ComEd) electric grid. The frequency regulation service balances the second to second variations in load and generation by absorbing excess energy during moments of over-generation and releasing energy during periods of under-generation to maintain power quality.
Due to their fast response time, battery projects are much more efficient at providing this service than conventional generators. This project efficiency allows PJM to deliver higher electrical quality, higher reliability, and lower cost to electricity consumers than traditional sources.
The battery storage modules for the projects will be supplied by BYD America. These batteries use lithium iron phosphate, an inherently safe variant of lithium battery chemistry. The projects consist of twenty-two identical energy storage modular units (eleven per site) each of which will be a self-contained energy storage system containing thousands of individual battery cells, power conditioning equipment, safety and monitoring systems. The energy storage control and dispatch systems will be developed and provided by RES Americas.