IEA ECES - Energy conversation through energy storage

The latest developments in the energy sector require solutions such as expanding storage capacities, increasing demand-side flexibility, or a combination of both of these elements. This makes energy storage a cross-programme activity, requiring expertise from many disciplines – energy conversion, all areas of end use, and distribution – to be taken into account.

The Technology Collaboration Programme on Energy Conservation through Energy Storage (ECES TCP) facilitates the necessary international, integral research. Its goal is to develop and implement energy-saving technologies to make energy systems run more efficiently and produce fewer emissions. In order to make this broad basis efficient and to make effective use of the synergies that arise from it, suitable strategies and research objectives must be developed and coordinated. ECES TCP is therefore concerned with concrete research activities as well as with disseminating the results and promoting networking between the stakeholders.

The programme focuses on the following topics:

  • Thermal storage (when the final energy being stored is heat or cold)
  • Electrical energy storage (such as pumped storage, batteries, compressed air, etc.)
  • Material storage systems (e.g. gas tanks)
  • Virtual stores (controllable loads)

Priorities and projects for 2019–2020:

  • Integration of energy storage into systems analysis
  • Use of artificial intelligence (AI) for virtual stores
  • Affordable heating and cooling
  • Flexible sector coupling
  • Developments for average-sized storage systems


Year of foundation: 1978
Financing: exclusively through national funding of the individual project activities (task-shared)
Members: Belgium, Austria, Canada, China, Denmark, Finland, France, Germany, Italy, Japan, Netherlands, Norway, South Korea, Sweden, Switzerland, Great Britain, USA, Slovenia, Turkey as well as the Federal Association for Energy StorageBundesverband Energiespeicher

Current projects

Annex 27 - Quality Management in Design, Construction and Operation of Borehole Systems
Annex 32 - Modelling of Energy Storage for Simulation/ Optimization of Energy Systems
Annex 33/58 - Material and Component Development for Thermal Energy Storage
Annex 34/55 - Comfort and Climate Box
Annex 35 - Flexible Sector Coupling


Delegate: Dr. Hendrik Wust, Germany, h.wust(at)

Alternate: Dr. Stefan Busse-Gerstengarbe, Germany, s.busse-gerstengarbe(at)

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