Cache Energy develops long-duration thermal energy storage systems using thermochemical reactions between limestone-derived calcium oxide pellets and water to produce heat that can be stored at room temperature and discharged on demand. The company manufactures storage materials and reactors designed for industrial heat applications, with discharge temperatures ranging from 85°F to 1,000°F and a stated thermal efficiency above 90 percent. Cache Energy is headquartered in Champaign, Illinois, and operates out of Research Park; the company announced a manufacturing expansion in Illinois that includes a one-ton-per-hour production line for energy storage materials and construction of a one-megawatt pilot energy storage system. The company offers its systems through a lease model with contract-backed maintenance and 99 percent uptime guarantees, targeting industrial operators seeking electrified heat without combustion.