Fraunhofer Institute for Solar Energy Systems ISE

R&D for Energy Transition

With its research, the Fraunhofer Institute for Solar Energy Systems ISE makes a significant contribution to a sustainable, economical, secure, and socially just energy supply on a global scale. As one of the world‘s largest solar research institutes, our goal is to drive forward the energy transition, by providing viable technological solutions, which are generated through excellent research results, successful industry collaborations and spin-offs. At Fraunhofer ISE around 1,400 employees conduct research in four key areas: energy provision, energy distribution, energy storage, and energy use.


In the market-oriented business areas of Photovoltaics: Materials, Cells and Modules​, Photovoltaics:​ Production Technology and TransferSolar Power Plants and Integrated PhotovoltaicsElectrical Energy​ StoragePower Electronics and GridsClimate-Neutral​ Heat and BuildingsHydrogen Technologies as well as System Integration, the Institute develops materials, components, systems and processes. In addition, we perform analyses, carry out studies and provide consultations. Fraunhofer ISE‘s state-of-the-art R&D infrastructure, with 22,300 m² of laboratory space, enables us to perform cutting-edge research at an international level. In our laboratories accredited according to DIN EN ISO/IEC 17025, we offer customized testing and certification procedures. Fraunhofer ISE is certified according to the quality management standard DIN EN ISO 9001:2015 and according to the standard DIN EN ISO 50001:2018 for energy management.

 

Fraunhofer ISE - Newsletter

You are interested in up-to-date information on our R&D activities?

 

Fraunhofer ISE -
Annual Report 2024/25

[PDF  10 MB]

Current Press Releases

 

Press Release #31 / 10.11.2025

Fraunhofer ISE Spin-Off Heat Pumps Watch Provides Neutral Facts About Heat Pumps

The spin-off led by scientist Dr. Marek Miara aims to provide orientation on the topic of heat pumps for professionals, policymakers, and homeowners considering a change in their heating systems. 

 

Press Release #30 / 3.11.2025

Fraunhofer ISE Research Project Completed: Heat Pumps Provide Climate-Friendly Heating in Existing Buildings

Over four years, researchers conducted detailed measurements on 77 heat pumps in single-family to three-family homes. 

 

Press Release #29 / 14.10.2025

Energy transition in the railway power grid: direct feed-in of solar power through innovative inverters

The project "PV4Rail" examined how the grid of Deutsche Bahn can be utilized for the feed-in of solar power.

 

Press Release #27 / 26.9.2025

Innovative Production Processes for the Core Components of Fuel Cells and Electrolyzers

Fraunhofer ISE has established a versatile platform for research on the production of membrane electrode assemblies.

News and Events

 

Trade Fairs, Conferences and Workshops

15.10.2025

Dr. Elias Frei appointed deputy director of Fraunhofer ISE

The head of the "Hydrogen Technologies" division additionally assumes the representation for institute director Prof. Dr. Andreas Bett as of October 1, 2025.
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2.10.2025

Fraunhofer ISE Receives German Sustainability Award

The Fraunhofer Institute for Solar Energy Systems ISE has been awarded the German Sustainability Award (“Deutscher Nachhaltigkeitspreis”) for companies in the "Research and Development" sector. This was announced today by the Foundation for the German Sustainability Award e.V. The award is given to Fraunhofer ISE for its research and development achievements towards sustainability as well as for its commitment to integrating sustainability into operational processes.
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24.9.2025

ODTÜ-GÜNAM and Fraunhofer ISE join forces in photovoltaics research

The Center for Solar Energy Research and Applications of Middle East Technical University ODTÜ-GÜNAM in Ankara, Türkiye, and the Fraunhofer Institute for Solar Energy Systems ISE in Freiburg, Germany, signed a Memorandum of Understanding at the 42. European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC 2025). The two research organizations strengthen their collaboration in applied solar PV research. The goal is to facilitate technology transfer and the industrialization of PV products in Europe across the full value chain.
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23.9.2025

High-Efficiency Solar Cells for Space: 1st Place for Fraunhofer ISE at the INNOspace Masters Award

A research team from the Fraunhofer Institute for Solar Energy Systems ISE has won 1st prize in the "Research" category at the INNOspace Masters competition organized by the German Aerospace Center (DLR). The team led by Dr. Jonas De Rose and Dr. David Lackner received the award for their approach to transferring established production technologies from terrestrial silicon photovoltaics to III-V high-efficiency solar cells for use in space.
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Current Posts from "Innovation4E", the Research Blog of Fraunhofer ISE

We want to share our expertise with you. The research blog of Fraunhofer ISE  »Innovation4E« offers a platform for information and exchange.