Containerized energy storage system uses a lithium phosphate battery as the energy carrier to charge and discharge through PCS, realizing multiple energy exchanges with the power system and connecting to multiple power supply modes, such as photovoltaic array, wind energy, power. . Containerized energy storage system uses a lithium phosphate battery as the energy carrier to charge and discharge through PCS, realizing multiple energy exchanges with the power system and connecting to multiple power supply modes, such as photovoltaic array, wind energy, power. . Containerized Battery Energy Storage Systems (BESS) are essentially large batteries housed within storage containers. These systems are designed to store energy from renewable sources or the grid and release it when required. However, this design also faces challenges such as space constraints, complex thermal management, and stringent safety. . We combine high energy density batteries, power conversion and control systems in an upgraded shipping container package. Lithium batteries are CATL brand, whose LFP chemistry packs 1 MWh of energyinto a battery volume of 2. Our design incorporates safety protection. . The Bluesun 20-foot BESS Container is a powerful energy storage solution featuring battery status monitoring, event logging, dynamic balancing, and advanced protection systems.