With the project "Open-source modeling of the future role of renewable hydrogen in Germany and Europe", a team from the Department of Economic and Infrastructure Policy at Technische Universität Berlin, together with the German Institute for Economic Research (DIW), is researching what role renewable hydrogen will play in the energy transition in Germany and how it can contribute to achieving the goal of climate neutrality. Economist Christian von Hirschhausen from the Technical University is leading the project; in addition, infrastructure researcher Konstantin Löffler (also from the Technical University) and Franziska Holz and Wolf-Peter Schill from DIW's Energy-Transport-Environment department are involved as principal investigators. The group will use digital, open-source-based computational models to address questions such as how much hydrogen needs to be produced to achieve decarbonization at the national as well as the European level, and how a switch to renewable hydrogen would affect electricity storage. In addition, the team is addressing the problem of how to negotiate the needs of a flexible energy sector on the one hand and the demand for energy efficiency on the other. Efforts are also being made to strengthen international research collaborations, including with the Norwegian University of Science and Technology in Trondheim and the American University in Washington, D.C.