In today’s world, commercial and industrial (C&I) customers are becoming electricity producers as well as consumers (or prosumers). A battery energy storage device thus becomes an integral part of the changing relationship between the utilities and it's customers. Hitachi ABB Power Grids' battery energy storage system, PQpluS™ helps the electricity consumers by actively managing the timing and profile of their energy usage. It reduces energy costs and makes the system more resilient while improving the overall efficiency, reliability and availability of the power system.