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 business areas of Photovoltaics, Energy Efficient Buildings, Solar Thermal Power Plants and Industrial Processes, Hydrogen Technologies and Electrical Energy Storage as well as Power Electronics, Grids and Smart Systems, 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.


Fraunhofer ISE - Newsletter

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Paths to a Climate-Neutral Energy System

The German Energy Transition in its Social Context

Current Press Releases


Press Release #22 / 20.10.2022

Fraunhofer ISE Supports Energy-Intensive Industries in Identifying Energy-Saving Potential

Massive price increases are a looming threat to the existence of energy-intensive industries. As a result, saving energy is becoming a key issue for companies. 


Press Release #20 / 11.10.2022

Kalyon and Fraunhofer ISE Sign MoU for Research on Integrated Photovoltaics and PV Storage Technologies

Cooperation in the field of agrivoltaics as well as in other integrated photovoltaic technologies and PV storage technologies over the next three years.


Press Release #19 / 10.10.2022

Propane-based Refrigeration Circuit for Heat Pumps Achieves New Efficiency Record

The LC 150 project team has now succeeded in setting a new efficiency record: A heating capacity of 12.8 kilowatts was achieved with only 124 grams of propane




Press Release #18 / 26.9.2022

Promoting the Expansion of Photovoltaics by Cutting Production Times for High-Efficiency Solar Cells by Half

A consortium of plant manufacturers, metrology companies and research institutions have come up with a proof of concept.

Film Portrait

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News and Events


Trade Fairs, Conferences and Workshops


Project SOLARX: Production of Heat, Electricity and H2 from Solar Energy

The project “Dispatchable concentrated Solar-to-X energy solution for high penetration of renewable energy (SOLARX)" ,funded by the Horizon Europe program, was launched on November 1, 2022. The main objective of the 3-year project with a total budget of 3 million euros is to demonstrate at laboratory scale the technical, economic and social relevance of the efficient synergic production of heat, electricity and hydrogen from the solar resource in a single facility. The consortium is composed of companies, technological centers, industrial partners and universities: HyGear (Netherlands), Acciona Industrial (Spain), EMD International (Denmark), Fraunhofer Institute for Solar Energy Systems ISE (Germany), Danmarks Tekniske Universitet (Denmark), Laboratoire Nanotechnologies et Nanosystèmes de la Université de Sherbrooke (CNRS, France/Canada) and accelopment Schweiz AG (Switzerland).
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First Green Solar Modules Integrated into Façade of the Center for High Efficiency Solar Cells

Sixty photovoltaic (PV) solar modules with a green MorphoColor® structural layer have recently been added to the façade of the Center for Highly Efficient Solar Cells at the Fraunhofer Institute for Solar Energy Systems ISE in Freiburg. The pilot project for building-integrated photovoltaics (BIPV) will supply the research institute with approximately 11 megawatt hours of solar electricity per year. The MorphoColor® technology developed by the research institute makes it possible to color the glass of the PV modules, while maintaining at least 90 percent of the module efficiency. The integrated photovoltaic system can either set colored accents on the building façade, as in this example, or visually blend into the building, for example, as brick red-colored PV modules on the roof.
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Team consisting of ADS-TEC and Fraunhofer ISE among the Top Three Finalists of the German Future Award 2022

Today the German President Frank-Walter Steinmeier announced the winner of the German Future Prize 2022 at a festive ceremony in Berlin. The nominated team made up of Thomas Speidel, CEO of the listed ADS-TEC Energy plc (NASDAQ: ADSE) and managing partner of the ADS-TEC Group, Dr. Thorsten Ochs, Chief Technology Officer of ADS-TEC Energy, and Dr. Stefan Reichert, group leader of Power Converters at the Fraunhofer Institute for Solar Energy Systems ISE, was among the top three finalists. The team was nominated for the development of a storage-based ultra-fast charging system, called “ChargeBox”. This year’s winner of the German Future Prize was Zeiss Microscopy GmbH with their 3D microscope to study living cells.
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Prof. Christopher Hebling receives the Global Excellence Award by Energy and Environment Foundation

The Energy and Environment Foundation (EEF), India, organized the “World Hydrogen Energy Summit 2022“ from October 16 to 17, 2022. Coinciding with the conference, the annual “EEF Global Excellence Awards“ is being presented to outstanding and distinguished energy personalities. Prof. Christopher Hebling, Director of the Business Division Hydrogen Technologies Fraunhofer ISE, has received the award in the category “Hydrogen Sector“.
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Current Posts from "Innovation4E", the Research Blog of Fraunhofer ISE


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.

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.

Episode 12 of a series on heat pumps in existing buildings I Marek Miara / 20.5.2021

How do we get more heat pumps in existing buildings?

Episode 11 of a series on heat pumps in existing buildings I Marek Miara / 7.5.2021

Can heat pumps only be used in one- and two-family houses?

Episode 10 of a series on heat pumps in existing buildings | Marek Miara / 29.4.2021

Is it better to combine a heat pump with fossil heating in some cases?

Episode 9 of a series on heat pumps in existing buildings | Marek Miara / 24.2.2021

Is it worth waiting for technological developments before switching to a heat pump?

Episode 8 of a series on heat pumps in existing buildings | Marek Miara / 14.4.2021

Isn’t heating with heat pumps too expensive?

Episode 7 of a series on heat pumps in existing buildings | Marek Miara / 24.3.2021

How ecological are heat pumps in existing buildings?