The distributed modular energy storage system is an energy storage system designed by Guangdong Lihua for industrial and commercial power usage scenarios, which can operate safely and efficiently in various application scenarios. Lihua industrial and commercial energy storage consists of power cabinets and battery cabinets, the main features of which are small footprint and flexible configuration. It can be distributed and deployed in various industrial and commercial energy storage application scenarios to realize functions such as peak shaving and valley filling, dynamic expansion, participation in power grid deployment, and emergency power consumption. It can maximize the self-consumption rate of photovoltaics, reduce the electricity expenses of industrial and commercial owners, and help enterprises save energy and reduce emissions.