According to the unpredictable behavior of renewable energy sources and load demand, energy management in DC microgrids is difficult and complex. Balancing power converter regulation processes, peak demand and lack power are some of the main issues. For the DC microgrid to operate reliably and effectively, great care must be taken in how the photovoltaic (PV) system and battery energy storage system (BESS) are used. For the purpose of resolving the preceding issues, this paper proposes employing the DC microgrids centralized energy management approach. Coordinating between the DC microgrids intellectual layer and several electrical surface parts is the CEMS. To control energy during peak and off-peak load demand, optimize PV-BESS consumption and carry out load dropping operations, it makes use of multi-optimization. In order to prevent overusing AC grid power, a suitable approach to the PV-BESS problem is also developed and addressed via linear programming. In cases of PV power deficiency, the best way to implement load splitting is to solve a mixed-integer linear programming problem in order to maintain power balance and DC bus voltage management. The PV systems efficient functioning in maximum power point tracking, OFF-MPPT mode (i.e., voltage regulation), and BESS charging and discharging are all shown by the proposed CEMS. It is demonstrated that the DC microgrid operations performance, efficiency and availability are enhanced by the hierarchical control structure of CEMS. Therefore, a 48V and 1.2-kW PV-BESS-based DC microgrid system is built in MATLAB/Simulink to demonstrate the effectiveness of the proposed method under various conditions.