TW-MVC-115050A1 lithium battery energy storage system is a lithium battery energy storage system specially designed for places with severe power supply pressure, prone to power outages, and unstable power grids. The system can not only solve a series of power grid problems such as grid instability and voltage sag for end users, but also configure a certain backup time according to the user’s requirement to ensure that the user's electrical equipment can still operate normally after the mains power is interrupted. Users have enough time to do relevant processing or connect to other power generation equipment (such as diesel engines). At the same time, the energy management system equipped with the system can perfectly ensure the safety of users' electricity consumption. The system has comprehensive and powerful communication functions and can realize interactive communication with various devices.