Thermal energy storage methods consist of sensible heat storage, which involves storing energy using temperature differences; latent heat storage, which utilizes the latent heat of phase change materials; and thermochemical heat storage, which utilizes reversible. Thermal energy storage methods consist of sensible heat storage, which involves storing energy using temperature differences; latent heat storage, which utilizes the latent heat of phase change materials; and thermochemical heat storage, which utilizes reversible. Thermal energy storage (TES) refers to heat that is stored for later use—either to generate electricity on demand or for use in industrial processes. Concentrating solar-thermal power (CSP) plants utilize TES to increase flexibility so they can be used as “peaker” plants that supply electricity. Heating accounts for nearly half of the global energy demand, and two-thirds of that is met by burning fossil fuels like natural gas, oil, and coal. Solar energy is a possible alternative, but while we have become reasonably good at storing solar electricity in lithium-ion batteries, we're not. Lowest levelized cost of electricity (LCOE) for solar plant configurations in Riyadh, Saudi Arabia. PV+ETES system has PV charging thermal energy storage (power-to-heat), which discharges thru a heat engine. Nighttime fractions correspond to 3, 6, 9, and 12 hours of storage. Low-cost sand used for. Solar thermal energy (STE) is a form of energy and a technology for harnessing solar energy to generate thermal energy for use in industry, and in the residential and commercial sectors. In most types of systems, a heat-transfer fluid is heated and circulated in the receiver and used to produce steam.