A Containerized Energy Storage System (ESS) is a modular, transportable energy solution that integrates lithium battery packs, BMS, PCS, EMS, HVAC, fire protection, and remote monitoring systems within a standard 10ft, 20ft, or 40ft ISO container. Atlas Copco has developed a 10 ft and 20 ft container as an Energy Storage System, designed to meet the requirements of both off and on grid applications. Ideal for use in renewable power plants. The batteries and converters, transformer, controls, cooling and auxiliary equipment are pre-assembled in the self-contained unit for 'plug and play' use. The standardized and prefabricated safety hazards caused by local installation differences and management risks.