An electrical energy storage system is an energy reservoir that can store electrical energy and supply energy when required. Generally, energy storage systems perform three functions; energy management, power bridging, and power quality control. Technological advancements in electricity storage systems have created opportunities for storage systems to provide unique ancillary and customer energy management services to the evolving grid.
Detailed report at: http://www.reportsandintelligence.com/global-energy-storage-for-microgrids-2014-2018-market