The increasing integration of renewable energy sources into energy systems has driven the development of storage technologies, with pumped hydroelectric storage (PHS) as a prominent solution. This document reviews the need for hybridization between renewable sources such as photovoltaic solar energy and wind energy with pumped hydroelectric power to guarantee the energy system’s stability and reliability. Solar and wind energy’s technical advantages and disadvantages are discussed, as well as the challenges associated with their variability and dependence on external factors such as climate. Likewise, optimization models that combine these renewable sources with storage technologies such as PHS are explored, allowing better management of intermittent energy sources. In addition, relevant case studies are presented, highlighting hybridization’s economic and environmental potential. The review emphasizes the importance of developing energy policies that favor investment in hybrid systems and research into emerging technologies. Finally, it suggests the need to continue research on integrating advanced storage technologies to maximize efficiency and improve the resilience of energy systems in the context of decarbonization and climate change.