Renewable Energy Systems Americas Inc. (RES Americas) developed two grid-scale energy storage projects outside of Chicago that, once completed in 2015, will be the largest, fully commercial energy storage projects in North America. 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, 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.