A sturdy management technique that incorporates several hybrid energy storage alternatives is presented as a means of developing an independent and dependable renewable solar energy system. In this work, a small-scale freestanding power system configuration using the conventional proportional-integral (PI) control technique is illustrated to improve the reliability of solar panels. The suggested system integrates photovoltaics (PVs), fuel cell technology (FCs), supercapacitors, and batteries into a solitary arrangement with integrated energy storage and generating devices. In addition to it, the fuel cell is fed with the self-generated hydrogen from an electrolyzer function module which makes the system a complete hybrid. The system is outlined to maintain a voltage of 300V at the DC load which is supported through different sources depending on the state of charge that is taken in two different cases when the battery SOC is 50\% and when it is 90\%. The production of hydrogen and fuel cell discharge are directly depended on the SOC of the battery. By limiting excessive discharge, the power flow method in the simulation serves to safeguard the battery's health.
The system makes use of a maximum power point tracking (MPPT) circuit and a direct current converter to maximize the power that is produced by the solar panel array. This serves as an unambiguous instance of how the advantages of the network may be used to address the shortcomings of the individual sources and minimize unnecessary consumption of hydrogen. The fundamental system parameters, such as fuel cell current, battery, and SC states of charge (SOC), are controlled via the tried-and-true PI control strategy. For the sake of the objectives for evaluation and tracking, the system was created in MATLAB/Simulink.