The 15KW LiFePO4 energy storage battery has flexible styles including wall-mounted embedded, floor-standing stackable and portable mobile types, which can be selected according to site size and power demand, and support multi-machine parallel expansion to increase energy storage capacity easily. In terms of performance, it has outstanding cycle capacity with more than 6000 charge-discharge cycles under industry standard working conditions, maintaining high-efficiency endurance after deep discharge. Adopting a closed waterproof design with IP65 protection grade, it is safe for indoor and outdoor use. With a designed service life of 10 years, its cells are safe, stable and thermally stable without fire and explosion risks, combining practicality and safety for various civil and commercial energy storage systems.