Fraunhofer IWES has 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 in Kassel.
IWES in 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 is employed at the IWES branch in Kassel. The annual budget is approximately 20 million euros.