Energy management in a PV fuel cell and battery system in MATLAB involves the optimization of energy utilization from multiple sources to meet demand efficiently. This process entails modeling the PV array, fuel cell, and battery components using Simulink or MATLAB scripts, integrating historical or real-time data for energy consumption and solar irradiance, implementing optimization algorithms to balance energy flow among the components considering factors like demand and resource availability, designing control strategies for battery charging, discharging, and fuel cell operation, simulating the integrated system to analyze performance under different conditions, and iteratively refining algorithms and parameters for enhanced efficiency and reliability. Through MATLAB's comprehensive tools for modeling, simulation, optimization, and control, effective energy management strategies can be developed to maximize system efficiency and sustainability.