Surge protectors for Energy Storage Systems (ESS) The Energy Storage System (ESS) respond, either, to a financial issue to improve energy management (peak management/frequency regulation) or to an ecological issue pushing for energetic transition phenomena. Through the energy storage system, green energy production becomes more efficient. The cost of facilities and the importance of the operation and efficiency of such equipment makes their loss of service unacceptable CITEL offers you a whole range of suitable surge protectors.