This paper aims to provide a review of hybrid renewable energy systems (HRESs) in terms of principles, types, sources, hybridization methods, cost of unit energy produced, and applications. The works were reviewed for HRESs with and without energy storage. Solar Energy Solar energy is among the most abundant and readily available renewable resources. It is harnessed by photovoltaic (PV) technology, which converts sunlight directly into electricity, or concentrating solar power (CSP) systems, which employ mirrors or lenses to focus sunlight into a. The growing need for sustainable energy solutions has propelled the development of Hybrid Renewable Energy Systems (HRESs), which integrate diverse renewable sources like solar, wind, biomass, geothermal, hydropower and tidal. The results can be summarized as follows:.
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