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New area of business: Bosch to develop systems for water treatment

Company offers custom technology for the worldwide use of electrolyzers in hydrogen production

  • Bosch systems enable economical and environmentally friendly water treatment.
  • With its water treatment systems, Bosch is expanding its portfolio to include an essential
    element of the production and use of hydrogen.
  • The market launch for the systems is scheduled for 2024.
  • The technological approach to water treatment will be presented at the Bosch Tech Day 2023.
Tim Wieland

Tim Wieland >


Stuttgart, Germany – “A climate-neutral world won’t work without green hydrogen,” says Dr. Stefan Hartung, chairman of the Bosch board of management. Bosch is now expanding its business to include technology for water treatment. In addition to systems using the usual water treatment method of reverse osmosis, Bosch also plans to offer new solutions specifically engineered for remote areas and offshore locations. “Above all, the production of green hydrogen requires ultrapure water. With our special-purpose systems, water treatment can be done anywhere, even in the most remote areas of the world, in an economical and environmentally friendly way,” Hartung says. The systems designed by Bosch Manufacturing Solutions are not only robust and low maintenance, but compared to solutions commonly available on the market, they eliminate the need for chemicals in water treatment. With its entry into this new business field, Bosch is closing the circle and rounding off its range of products and services: “We’re developing technology for water treatment as well as for the generation, compression, storage, and use of hydrogen – and doing so for various sectors. Hardly any other company offers such a broad portfolio,” Hartung says.

Water treatment forms the first and most fundamental link in the hydrogen value chain. Bosch has developed the water treatment technology for electrolysis at its locations in Renningen, Stuttgart-Feuerbach, České Budějovice and external pilot projects are to be added in the course of this year. The market launch for the systems is planned for 2024 and Bosch will be presenting the technology at the Bosch Tech Day in Stuttgart-Feuerbach on July 13, 2023.

Special-purpose water treatment systems for the toughest conditions
Electrolyzers require ultrapure water for the production of hydrogen. “Impurities in the water can render electrolyzers inoperative in a very short time,” explains Dr. Wolfgang Schleifenbaum, head of the Hydrogen business unit at Bosch Manufacturing Solutions. In the future, hydrogen will be produced in areas with strong winds or abundant sunshine – Africa, South America, or Northern Europe, for example. Locations offshore or in the desert present particular challenges: considerable distances from the technical facilities, water high in salt or minerals – all make water treatment more difficult. As a result, demand for special equipment is high: Bosch expects that starting in 2035, some 500 of the company’s special-purpose water treatment systems will be needed worldwide each year.

The Bosch systems remove minerals from the water by means of thermal and electrochemical processes to obtain ultrapure water. Thanks to a treatment process without filter media, it is possible for operators to completely dispense with the use of chemicals. “Green hydrogen is sustainable only if its production doesn’t cause collateral damage to the environment; for example, by putting chemicals into our already heavily polluted waters,” Schleifenbaum explains. For predictive maintenance of the equipment, even from far away, Bosch offers software solutions that ensure robust operation in harsh environmental conditions.

Industrial systems for water treatment in developed areas
The demand for ultrapure water for the world’s hydrogen projects is enormous. As the world strives to achieve the Paris climate targets, Bosch estimates that, starting in 2050, annual demand for the water used in electrolysis will amount to some four cubic kilometers – more than the volume of Germany’s Lake Starnberg. Germany, too, has ambitious plans: the government has set a goal of installing H2 electrolyzers with a total capacity of 10 gigawatts by 2030 (source: German government, 2022). The EU aims to install 40 gigawatts of electrolysis capacity in Europe by 2030, with plans to produce up to 11 million tons of renewable hydrogen (source: European Commission, 2020). “Hydrogen will play a crucial role in the energy supply of the future. Industries worldwide must use hydrogen if they want to become climate neutral. Bosch supplies water treatment technology that meets different requirements with regard to the size, performance, and location of the electrolyzers,” Schleifenbaum says. For water treatment in developed areas, Bosch plans to expand its portfolio to include industrial systems that use reverse-osmosis processes and ion exchangers to turn tap water into the ultrapure water electrolyzers need. With this combination of industrial and special-purpose equipment, Bosch fulfills the requirements for electrolysis projects worldwide.

Water treatment with Bosch technology – “Invented for life”
Bosch technologies also help maintain valuable drinking water reserves. The Bosch system is particularly efficient, reducing the feedwater required for producing water for the electrolysis process by up to one-third compared to common solutions on the market. In addition to producing water for electrolysis, the special-purpose systems can also be adapted to produce drinking water. “With our water treatment systems, we follow the Bosch guideline and offer technology that is ‘Invented for life.’ In areas where drinking water is scarce, we can use our technology to help improve the supply,” Schleifenbaum says.

Contact person for press inquiries:
Tim Wieland
Phone: +1 248-876-7708

About Bosch
Having established a presence in North America in 1906, today the Bosch Group employs 37,000 associates in more than 100 locations in the region (as of Dec. 31, 2022). Bosch generated consolidated sales of $15.1 billion in the U.S., Canada and Mexico in 2022. For more information visit, and

The Bosch Group is a leading global supplier of technology and services. It employs roughly 421,000 associates worldwide (as of December 31, 2022). The company generated sales of $93.1 billion in 2022. 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 470 subsidiary and regional companies in over 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 136 locations across the globe, Bosch employs some 85,500 associates in research and development, of which nearly 44,000 are software engineers.

The company was set up in Stuttgart in 1886 by Robert Bosch (1861–1942) as “Workshop for Precision Mechanics and Electrical Engineering.” The special ownership structure of Robert Bosch GmbH guarantees the entrepreneurial freedom of the Bosch Group, making it possible for the company to plan over the long term and to undertake significant upfront investments in the safeguarding of its future. Ninety-four percent of the share capital of Robert Bosch GmbH is held by Robert Bosch Stiftung GmbH, a charitable foundation. The remaining shares are held by Robert Bosch GmbH and by a corporation owned by the Bosch family. The majority of voting rights are held by Robert Bosch Industrietreuhand KG, an industrial trust. The entrepreneurial ownership functions are carried out by the trust.

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