Key EES technologies include Pumped Hydroelectric Storage (PHS), Compressed Air Energy Storage (CAES), Advanced Battery Energy Storage (ABES), Flywheel Energy Storage (FES), Thermal Energy Storage (TES), and Hydrogen Energy Storage (HES). 16 PHS and CAES are large-scale. What does energy storage integrated equipment include? Energy storage integrated equipment comprises several critical components designed to optimize the capture, storage, and utilization of energy. It is a fundamental technology for ensuring the safety, reliability and sustainability of the electricity system, especially in the presence of. Energy storage is the capturing and holding of energy in reserve for later use. 1 Batteries are one of the most common forms of electrical energy storage. The first battery, Volta's cell, was developed in 1800.