<p>➀ The Reiner Lemoine Institute (RLI), in collaboration with other institutions, demonstrates the potential of heat storage systems in Berlin's quest for climate-neutral heating; </p><p>➁ The project highlights the importance of land availability, legal uncertainties, and geological conditions for the implementation of heat storage solutions; </p><p>➂ Seasonal heat storage systems, particularly aquifer heat storage, are suggested as suitable for Berlin, helping to shift excess heat from summer to winter and increase the use of renewable energy sources.</p>