With a staff of approximately 930, Fraunhofer ISE is the largest solar energy research institute in Europe. The work at the Institute ranges from the investigation of scientific and technological fundamentals for solar energy applications, through the development of production technology and prototypes, to the construction of demonstration systems.

The Institute plans, advises and provides know-how and technical facilities and services.

The Fraunhofer ISE is integrated into a network of national and international co-operation. Among others, it is a member of the ForschungsVerbund Erneuerbare Energien (FVEE - German Research Association for Renewable Energy) and the European Renewable Energy Research Centres (EUREC) Agency.