Malta's Pumped Heat Energy Storage (PHES) technology is based on a high-temperature heat-pump electricity storage system for large-scale long-duration energy storage (LDES). This technology is well-suited to the changing energy landscape, with the potential for discharge duration capabilities of. . 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., a leader in long-duration energy storage, today announced that it has closed on a round of financing provided by a group of investors including Siemens Energy Ventures and Alfa Laval as well as existing shareholders Breakthrough Energy Ventures. . Malta's utility-scale, long-duration energy storage system uses steam-based heat pump technology to deliver dispatchable, cost-effective energy. Malta's long-duration energy storage solution is already being deployed. Malta has no domestic resource of fossil fuels and no gas distribution network, and relies overwhelmingly on imports of fossil fuels and electricity to cover its energy needs.