Abstract: Energy storage is a natural course of action but is an imperative topic to be researched upon so as to meet the energy requirements of the future and at critical stages. High amount of energy can be synthesized over a short period of time but the real challenge is to satisfy energy demand whenever needed. Energy storage implies transformation of difficult to store form of energy to a readily storable one. Assorting commercially, energy storage systems can be grouped into chemical, mechanical, thermal, electrical and biological. This paper focuses on technologies of storage of electricity

Keywords: EES, PHS.