http://www.renewableenergyworld.com/articles/2015/08/ge-s-energy-storage-restart.html?cmpid=renewablestorage0862015

It appears GE never left the energy storage market. Instead, it seems leadership took a ‘practical’ pill. In April 2015, the company won a contract to supply Con Edison Development with an 8-megawatt-hour battery storage system at a solar project in California. The system will incorporate GE’s Mark IVe control system, GE’s Brilliance MW inverters and GE’s performance guarantees (possibly the most important feature). What the system will not include is GE’s Durathon sodium-ion batteries. GE will be outsourcing or acquiring lithium-ion batteries for the projects.