Eos Energy Storage demonstrated its grid-scale battery system at Pacific Gas & Electric’s (PG&E) smart grid lab in San Ramon, Calif., with the support of a $2.1 million award from the California Energy Commission. For the project, the company is partnering with PG&E, the Electric Power Research Institute (EPRI), Lawrence Berkeley National Lab (Berkeley Lab), Stem, and ETM Electromatic (ETM).The project will test Eos's Aurora product as the company ramps up manufacturing to deliver MW-scale batteries in 2016. The first of these systems, the Aurora 1000|4000, is a containerized DC battery system that can provide 1-MW for four hours of continuous discharge to shave system peaks and defer costly transmission and distribution upgrades. The battery also offers fast-responding surge capability to balance power fluctuations associated with intermittent renewable generation.