Agreement to build a test facility for highly efficient and cost-effective energy storage. From left to right: Andre Thess, Head of the DLR Institute of Engineering Thermodynamics, Wolfram Ressel, Rector of the University of Stuttgart, Pascale Ehrenfreund, Chair of the DLR Executive Board, Oliver Kraft, KIT Vice President, and Thomas Wetzel, Head of KIT Institute of Thermal Process Engineering.