Fraunhofer Institute for Solar Energy Systems ISE

R&D for Energy Transition

The Fraunhofer Institute for Solar Energy Systems ISE in Freiburg, Germany is the largest solar research institute in Europe. With a staff of about 1400, we are committed to promoting a sustainable, economic, secure and socially just energy supply system based on renewable energy sources. We contribute to this through our main research areas of energy provision, energy distribution, energy storage and energy utilization. Through outstanding research results, successful industrial projects, spin-off companies and global collaborations, we are shaping the sustainable transformation of the energy system.

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. For this purpose, we have an excellent laboratory infrastructure at our disposal. In addition, we perform analyses, carry out studies, provide consultations and offer our clients 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 -
Annual Report 2023/24

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Fraunhofer ISE - Newsletter

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Current Press Releases


Press Release #11 / 15.4.2024

Status Quo - One Year Since Germany’s Nuclear Exit: Renewable Capacity Expands, Electricity from Fossil Fuels Significantly Reduced

On the first anniversary of the phase-out, the Fraunhofer Institute for Solar Energy Systems ISE takes stock.


Press Release #08 / 12.3.2024

Fraunhofer Spin-off S Mile Solutions: Help for the Last Mile in the Sub-Saharan Region

The Fraunhofer spin-off "S Mile Solutions (Pty) Ltd” provides smart, small-scale and off-grid infrastructure solutions for rual areas in Africa. 


Press Release #7 / 27.2.2024

German Chancellor Olaf Scholz Visits Fraunhofer ISE in Freiburg

Federal Chancellor Olaf Scholz visited the Fraunhofer Institute for Solar Energy Systems ISE in Freiburg today. At Europe's largest solar research institute, he informed himself about new technologies for energy-efficient buildings and climate-neutral housing. 


Press Release #06 / 20.2.2024

From Concept to Small Batch: Technology Development Center Brings PV Modules to Market Readiness

Today, the institute opened its newly organized and expanded technology evaluation center Module-TEC with an area of 1,000 square meters. 


Film Portrait

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News and Events


Trade Fairs, Conferences and Workshops


"BatterieDigital_real" project: Artificial intelligence for battery research

The digitalization of research opens up numerous opportunities for innovative, data-based R&D services, while at the same time requiring standardized data management. In the new Fraunhofer-Gesellschaft pilot project "BatterieDigital_real", various institutes are creating a research data space for battery research. The Fraunhofer Institute for Solar Energy Systems ISE is collaborating with the University of Auckland to combine battery development and artificial intelligence.
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Majority of Farmers View Agrivoltaics as Positive

A study by the University of Göttingen and the Fraunhofer Institute for Solar Energy Systems ISE showed that the majority of farmers in Germany are open to agrivoltaics, the dual use of land for agricultural production and solar energy generation, and can imagine installing the technology on their farms. The research team conducted an online survey and analyzed the responses from 214 farmers. The results showed that 72.4 percent could imagine using agrivoltaics on their farm. The main motivations given were the additional source of income from self-generated electricity and the future-oriented development that agrivoltaics offers to the farm.
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Large-scale production of PEM electrolyzers: Catalyst inks for scalable printing technologies with reduced iridium loading

Electrolyzers make it possible to greatly expand the use of renewable energies by producing hydrogen, which can be used to store clean energy. In order to facilitate the high-volume production of competitive stacks for PEM electrolysis in the near future, researchers at the Fraunhofer Institute for Solar Energy Systems ISE are investigating scalable processes such as slot-die coating and screen printing for the production of catalyst layers for the membrane electrode assembly (MEA). They have now developed catalyst inks for both production processes that enable the production of catalyst layers with lower iridium loading and high throughput. This significantly reduces the material and manufacturing costs for PEM electrolyzers.
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Project Launch of UtiliSpaces: Control and Power Regulation within the Smart Meter Infrastructure

To ensure the stability of the distribution grid in critical situations, grid operators should be able to temporarily reduce the power of controllable consumers such as heat pumps and charging stations. The communication to enable this will operate via the so-called Controllable Local System (CLS) channel of the Smart Meter Gateway (SMGW). The joint research project "UtiliSpaces", funded by the German Federal Ministry of Education and Research (BMBF), is addressing the implementation challenges in the practice. The Fraunhofer Institute for Energy Economics and Energy System Technology IEE is project coordinator. The role of the Fraunhofer Institute for Solar Energy Systems ISE in the project is to test hardware and software for complex system controls in its Digital Grid Lab.
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Current Posts from "Innovation4E", the Research Blog of Fraunhofer ISE


Bruno Burger / 15.4.2024

One Year after the Nuclear Phase-Out in Germany: The Truth Behind the Myths


Scientific Blog of Fraunhofer ISE


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