Unlike traditional solar panels that stop working at sunset, thermal storage systems capture excess daytime solar energy in specialized materials like molten salts or phase-change compounds, releasing this stored heat to generate electricity when needed most. . Thermal storage technologies have the potential to provide large capacity, long-duration storage to enable high penetrations of intermittent renewable energy, flexible energy generation for conventional baseload sources, and seasonal energy needs. Yet to fully take advantage of these sources, excess energy must be stored so it's available when the wind isn't blowing or the sun isn't shining. Battery energy storage has grown to fill this need, but what if there were. . This review highlights the latest advancements in thermal energy storage systems for renewable energy, examining key technological breakthroughs in phase change materials (PCMs), sensible thermal storage, and hybrid storage systems. It is an effective way of decoupling the energy demand and generation, while plays an important role on smoothing their fluctuations. [1][2] The 280 MW plant is designed to provide six hours of energy storage.