The battery storage system functions as a key component in the system setup for storing surplus electrical energy, enabling load balancing, ensuring supply security, and contributing to cost reduction as well as the integration of renewable energies. The combination of battery storage and externally mounted inverter ensures efficient energy supply through flexible conversion of DC and AC, coupled with direct response to grid fluctuations. The integrated Energy Management System (EMS) optimizes energy flow, controls charging/discharging, and enables versatile applications.