Long Duration Thermal Energy Storage (LDTES) plays a crucial role in decarbonizing the industrial sector. It offers reliable solutions to bridge the gap between variable renewable energy sources and consistent industrial energy demand. LDTES is particularly well-suited for decarbonizing high-temperature industrial processes, such as those in the cement, steel, and chemical sectors, by potentially cutting over seven billion tons of industrial CO2 emissions (IEA, 2022 Greenhouse Gas Emissions from Energy, www.iea.org/data-and-statistics). Unfortunately, the regulation of thermal energy in the European Union (EU) falls under national or local jurisdiction and there is a regulatory gap that hinders the adoption of LTDES, delaying and, de facto, impeding the achievement of the EU’s net-zero objectives. Additionally, investments are hindered by legal uncertainty impacting expected profitability, as there are no mechanisms to stimulate such investments. The prjoect raises the following question: How can European and national legal frameworks integrate tailored revenue mechanisms to unlock the implementation of LDTES in the industrial sector?