Fraunhofer Institute for Energy Economics and Energy System Technology IEE

The Fraunhofer IEE in Kassel researches for the national and international transformation of energy systems. It develops technical and economic solutions in order to further reduce the costs of using renewable energies, to secure the supply despite volatile generation, to ensure grid stability at the high level and to promote the success of the energy transition business model.

Business Units

We offer companies from the energy supply, grid operation, energy electronics, energy informatics, wind energy, photovoltaics, bioenergy and investment sectors a rich portfolio of services, know-how and products that can be adapted to the needs of our customers. With the help of our technical and operational offerings, we actively and competently support our customers and partners in politics and industry.

  • Analysis and Consulting for Energy Economics    
  • Energy Meteorology Information Systems
  • Digital Portfolio Management
  • Grid Planning and Grid Operation
  • Power Electronics and Electric Drive Systems
  • Hardware in the Loop Systems
  • Plant Engineering
  • System Stability and Grid Integration
  • Wind Resource Assessment with LiDAR

Research Fields

Our research focus areas aggregate the necessary capabilities to realize the business units. They include both the skills and experience of our scientists, their equipment with laboratories and test facilities, their networking in the scientific community, as well as patents and IPRs.

  • Energy Informatics
  • Energy Meteorology and Renewable Resources
  • Energy Economics and System Analysis
  • Energy Process Engineering
  • Grid Planning and Grid Operation
  • Grid Stability and Power Converter Technology
  • Thermal Energy Technology

Test Centers and Laboratories

The Fraunhofer IEE disposes extensive testing and experimental facilities, laboratories, and state-of-the-art equipment.

Together with the know-how of our scientists and engineers, these facilities mean that the institute is able to offer its customers and partners future oriented research and development services and infrastructure.

  • SysTec | Distribution Networks and Grid Integration
  • Power Electronics
  • Medium Voltage
  • Drive Technology and Electrical Machines
  • Power hardware-in-the-loop and software-in-the-loop
  • Control room digital energy
  • Wind Measuring Network
  • District Lab - heating grids
  • Electrochemical storage
  • Renewable gases
  • HBFZ - Hessian Biogas Research Center


The Fraunhofer Institute for Energy Economics and Energy System Technology IEE in Kassel was established in 2018 from the energy system technology branch of Fraunhofer IWES.

The Fraunhofer Institute for Wind Energy and Energy System Technology IWES had two main thematic areas, wind energy (northwest) and energy system technology (Kassel). It was established in 2009 as a merger of the former Fraunhofer Center for Wind Energy and Maritime Engineering CWMT in Bremerhaven and the Institute for Solar Energy Technology ISET founded 1988 in Kassel.

Since its founding in 2009, the Fraunhofer Institute for Wind Energy and Energy System Technology IWES had grown to almost 600 employees. As part of their strategic development and alignment, both divisions of the institute have developed largely independent profiles. The Executive Board and Senate of the Fraunhofer-Gesellschaft have therefore decided to continue the branches of the institute as independent institutes as of January 2018. For customers and industry partners, the sharpening of the profile will facilitate a clear allocation of activities.


Management of
the Institute


Board of Trustees

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