Press release #Research

Bosch opens hydrogen-compatible fuel cell pilot installation at Wernau plant

Bosch's contribution to the energy transition: Decentralized and environmentally friendly power generation

  • Future-oriented: electricity production at Wernau plant with three fuel cell units based on SOFC technology
  • Flexible: operation with hydrogen, biogas or natural gas possible
  • Tailor-made: reliable and scalable small power plants from Bosch production
  • Environmental friendly: almost noiseless and with low emissions
Thomas Pelizaeus

Thomas Pelizaeus >


Bosch is opening a new chapter in the energy transition: At the Bosch training center in Wernau, Germany, a fuel cell pilot installation based on SOFC technology, short for Solid Oxide Fuel Cell, is launched. The system consists of three fuel cell devices for stationary applications, which supplement the existing power supply of Wernau plant in a CO2-saving manner and drive the further development of these decentralized energy systems.

Franz Untersteller, Baden-Württemberg's State Minister for the Environment, Climate, and Energy, Andreas Schwarz, Member of the Baden-Württemberg Parliament, and Armin Elbl, mayor of Wernau, were among those who accepted Bosch Thermotechnology’s invitation to attend the official inauguration ceremony.
"As you see, Bosch has recognized the enormous economic potential associated with hydrogen and fuel cell technology, both in the mobility sector and in the field of stationary energy supply. And that's not all: With hydrogen, the economic prospects complement the ecological benefits wonderfully. This technology is a key technology for climate protection," explained Franz Untersteller during the event.

Fuel cell devices from Bosch with a wide range of applications

The development of these novel fuel cell systems was only made possible by close cooperation between the Bosch Corporate Research, Powertrain Solutions, and Thermotechnology divisions. Further SOFC pilot installations for testing and validation are located at the Bosch sites in Bamberg, Homburg, Renningen, and Schwieberdingen. Demonstration facilities are also planned in Stuttgart-Feuerbach and Salzgitter.

From 2020, the Bosch Group locations worldwide will no longer leave a CO2 footprint. The further development of the solid oxide fuel cell as an efficient and sustainable energy system also plays an important role in this respect, reports Uwe Glock, chairman of the board of management of Bosch Thermotechnology: "The energy transition can only succeed if we invest in sustainable, renewable energies over the long term. For Bosch, the highly efficient fuel cell is therefore an important contribution to the reliability of supply and flexibility of the energy system of the future.”

Focus on CO2 reduction: Operation with hydrogen, eco/biogas or natural gas

With the recently adopted hydrogen strategy of the Federal Government, hydrogen will become an important energy carrier of the future.

The SOFC fuel cell can be operated flexibly with hydrogen, eco/biogas, or natural gas: "The gradual switch to hydrogen as an energy carrier over the next few years makes the stationary fuel cell particularly future-proof in terms of achieving climate targets," explains Dr. Wilfried Kölscheid, head of the Solid Oxide Fuel Cell project at Bosch.

Compared to the electricity mix in Germany, a SOFC fuel cell system saves up to 40 percent in CO2 emissions, even when operated with natural gas. If the fuel cell is operated with hydrogen or ecogas, there are no direct CO2 emissions at all. A single SOFC unit with a power output of 10 kW can cover the annual electricity demand of more than 20 four-person households. At Wernau plant, this means that the energy requirements of an industrial building within the plant can be almost completely covered by the three fuel cell units.

"With the SOFC pilot installation in Wernau, Bosch is demonstrating that a reliable, environmentally friendly and flexible energy supply can be guaranteed decentrally by systems such as the fuel cell," reports Uwe Glock. "The installation underlines our efforts to drive forward the energy transition and the associated mitigation of climate change in all energy and heating solutions from Bosch," adds Wilfried Kölscheid.

SOFC devices with an overall efficiency of more than 85 percent

In a purely electrochemical process, oxygen ions pass through a thin ceramic electrolyte from an anode to the cathode in the SOFC fuel cell, where they react with hydrogen to form water. This produces electricity with an efficiency of more than 60 percent. The additional heat generated can be used to supply heating and hot water systems via a heat exchanger. With this dual use, an overall efficiency of more than 85 percent is achieved for SOFC devices.

Technical Contact:
Dr. Markus Ohnmacht M/PJ-SOFC

Journalist Contact:
Anne Kaletsch TT/COM

Bosch Thermotechnology is a leading European manufacturer of sustainable and energy-efficient heating, cooling and hot water solutions. In fiscal 2021, the company generated sales of about 4 billion euros (64 percent outside Germany) and employed approx. 14,200 people. Bosch Thermotechnology has strong international and regional brands and manufactures a diversified product range in Europe, America and Asia.

Further information is available online at

The Bosch Group is a leading global supplier of technology and services. It employs roughly 402,600 associates worldwide (as of December 31, 2021). The company generated sales of 78.7 billion euros in 2021. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. As a leading IoT provider, Bosch offers innovative solutions for smart homes, Industry 4.0, and connected mobility. Bosch is pursuing a vision of mobility that is sustainable, safe, and exciting. It uses its expertise in sensor technology, software, and services, as well as its own IoT cloud, to offer its customers connected, cross-domain solutions from a single source. The Bosch Group’s strategic objective is to facilitate connected living with products and solutions that either contain artificial intelligence (AI) or have been developed or manufactured with its help. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.” The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiary and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing, engineering, and sales network covers nearly every country in the world. With its more than 400 locations worldwide, the Bosch Group has been carbon neutral since the first quarter of 2020. The basis for the company’s future growth is its innovative strength. At 128 locations across the globe, Bosch employs some 76,100 associates in research and development, of which more than 38,000 are software engineers.

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