Thermal energy storage technologies need to be developed and become an integral component in the future energy system infrastructure to meet variations in both the availability and demand of energy. The main objectives of this project are to lower the cost, reduce the risks and optimise the performance of high-temperature (~25 to ~90°C) underground thermal energy storage technologies by demonstrating 6 distinct configurations of heat sources, heat storage and heat utilisation. Technical, economic, environmental, regulatory, and policy aspects will be addressed that are necessary to support efficient and cost-effective deployment in Europe. 

The project stimulated fast-track market uptake in Europe, promoting development from the demonstration phase to commercial deployment within 2 to 5 years on the European market and providing an outlook towards utilisation of full potential in 2050.

 Project website https://www.heatstore.eu/

Final project public report available in Publications

Project Updates


TNO - Nederlandse organisatie voor toegepast natuurwetenschappelijk onderzoekNetherlands
Energie Wasser BernSwitzerland
IF TechnologyNetherlands
KWR Watercycle Research InstituteNetherlands
ECW Geomanagement BVNetherlands
University of GenevaSwitzerland
Eidgenössische Technische Hochschule ZurichSwitzerland
University of NeuchatelSwitzerland
University of BernSwitzerland
Bochum University of Applied Sciences / International Geothermal CentreGermany
University of the AzoresPortugal
Reykjavik EnergyIceland
delta-h Engineering GmbHGermany
Noda GmbHGermany
SPIE BelgiumBelgium
Kempens WarmtebedrijfBelgium
Universitat Politécnica de CatalunyaSpain
Netherlands Institute of EcologyNetherlands


Geothermica financingTotal costOwn financing
HEATSTORE - Total financing 8.305.26816.265.9717.960.703