Overview and Main Areas of Work

Fraunhofer IEE (formerly known as Fraunhofer IWES, Kassel) mainly researches on energy system technology for the integration of renewable energy such as wind, solar and bio energy into supply structures. The current focus is on the transformation of the German energy system.
Under the leadership of Prof. Dr. Clemens Hoffmann, a staff of 310 scientists, engineers, non-technical staff, and students are employed in Kassel.
The annual budget is approximately 20 million euros.

Products and Services

Fraunhofer IEE possesses extensive testing and experimental facilities, laboratories, and state-of-the-art equipment. Our expertise has allowed us to develop and introduce new testing facilities and test methods. These facilities, coupled with the know-how of our scientists and engineers, enable Fraunhofer IEE to offer its customers and partners world class research and development services and infrastructure.

The department Energy Management and Energy Efficiency at Fraunhofer IEE focuses on IT solutions for building automation, energy management and integration of renewable energy in buildings. Selected topics are:

  • Vendor-independent platforms for decentral energy management and smart home applications (OGEMA)
  • New energy management applications and modern control concepts for grid-supporting energy management of decentral power-heat-storage systems
  • Software tools for optimal sizing of decentral power-heat-storage systems and integration
  • Development of new concepts for RE building integration (BIPV, etc.)
  • Measuring technology for decentralized energy systems

Fraunhofer IEE has developed the OGEMA framework since 2009 and has applied this technology to various types of premises. Fraunhofer IEE also acts as Coordinator of the OGEMA Alliance.


Fraunhofer IEE

Königstor 59
34119 Kassel
Web: Homepage


Dr.-Ing. Jan von Appen
Decentralized energy management
Tel.: +49 561 7294-276
E-Mail: Jan.vonAppen@iee.fraunhofer.de