, a leading long-duration energy storage solution provider, announced today that Southwest Research Institute (SwRI) has completed assembly and commissioning of the first-of-a-kind pumped heat (or thermal) energy storage (PHES) demonstration facility based on the. Malta Inc. Using proven subsystems, a locally sourced supply chain, and abundantly available materials like salt, the system delivers economical, clean energy with a flexible power and heat. Laughlin, “Mass Grid Storage With Reversible Brayton Engines,” in Thermal, Mechanical, and Hybrid Chemical Energy Storage Systems, ed. 13 years in power gen CSP construction, maint. Malta is a leading technology provider of electro-thermal LDES systems.