Battery Storage The state’s largest battery storage unit is online and helping NHEC meet its members’ increased demand for electricity during peak usage hours. The 2.45 megawatt (MW) battery project, located on the site of NHEC’s 2 MW Moultonborough solar array, was developed in partnership with ENGIE North America (ENGIE), a leading provider of energy storage services. The battery unit can power hundreds of homes and is being used to reduce our members’ peak demand for electricity when the temperature climbs. It charges from NHEC’s distribution system during times of low demand and discharges during periods of peak regional electricity use. By discharging during hours of peak electric usage, the battery saves NHEC’s members money on regional market and delivery charges while reducing demand on the grid. The battery project is also providing NHEC with insight and direct experience into how battery storage technologies interact with its electrical system and respond to price signals, and is being used to reduce NHEC’s transmission charges and regional capacity payments. NHEC estimates these discharges will save its members $2.3 million over the next 12 years. The battery storage unit can fully charge or discharge within two hours and is housed in a pre-fabricated 40 foot container located within the fence line of NHEC’s solar facility in Moultonborough, New Hampshire. The battery unit has on-site fire suppression equipment and is monitored 24 hours a day, year-round.