Hybrid energy systems have emerged because of the growing interest in renewable energy sources and as a way to feed loads located in regions far from the interconnected grid system. In addition, in regions with an interconnected grid system, hybrid energy systems have emerged to reduce the ever-increasing unit cost of electricity. Hybrid power generation systems can be developed with many combinations of different energy sources and storage devices. Solar and wind power are the most used renewable energy sources in hybrid power generation system. In applications, off-grid wind and solar power generation systems are often operated in conjunction with gas turbines, diesel generators, fuel cells, and battery banks. The main goal of the research work is to investigate the mechanism of modeling hybrid energy systems. The subject of the study is based on the modeling of exemplary hybrid energy systems using the HOMER program for the research object.