Power management and BESS design in solar PV DC microgrids

A solar photovoltaic (PV) system typically includes a Battery Energy Storage System (BESS), a solar controller, and a PV array. The DC-DC (Direct Current to Direct Current converter) converter within the solar controller transforms the power generated by the PV array at its Maximum Power Point (MPP) into the maximum available DC power. This power is then transferred to the DC bus, which supplies energy to the connected loads. The Battery Management System (BMS), in conjunction with a bidirectional converter, regulates the voltage of the DC bus and manages the power transfer from the BESS. This paper explores the operation of the DC microgrid under various load conditions, with BESS parameters selected to maximize battery life for specific home loads. The BESS integrated with the solar PV DC microgrid is simulated and validated using MATLAB/Simulink software.