RAE acted as the Owners Project Manager for Sterling Municipal Light Department during the conceptual design, RFP, design, installation and testing phases of this extremely interesting battery storage project. SMLD deployed a 2-megawatt/3.9 megawatt-hour battery storage system at their Chocksett Road Substation that is able to isolate from the main grid in the event of a power outage and, with an existing PV array, provide up to 12 days of emergency backup power to the Sterling police station and dispatch center, a community facility providing first responder services.