As the world looks to address climate change the demand for renewable power generation will increase. Energy storage will be needed to shift intermittent energy resources to match the demand for power. Solar thermal electric technologies (STE) offer the potential for low cost and efficient integrated energy storage. This talk will discuss the evolution of Abengoa’s thermal energy storage technologies for STE plants and how it can be used to help increase penetration of intermittent renewable generation and help support grid reliability.