Category: News

Whitepaper – Production and transportation costs for green hydrogen from an offshore wind farm to an industrial end-user onshore

One of the biggest challenges of today’s society is to prevent the global warming. To achieve this target, 196 Nations including Germany, signed the Paris Agreement1 in 2015 to limit the global warming by 2°C compared to pre-industrial levels. Each country is responsible for the compliance and the establishment of individual carbon reduction strategies. For example, Germany aims to become climate neutral by the year of 2050. Therefore, Germany already plans to implement 20 GW of offshore wind capacity3 and 5 GW of hydrogen capacity until 2030.

Green hydrogen plays an important role in decarbonization of multiple sectors e.g. mobility, energy and industry. For industrial production sites, green hydrogen can reduce greenhouse gas emission significantly and make it traceable, e.g. by replacing the fossil fuels used in heat generation. On the other hand, the demand of centralized industrial production sites for the long-term, secured supply of hydrogen can be covered by large offshore wind farms (OWF). Consequently, green hydrogen and offshore wind power can be considered as key factors to assist Germany achieve the climate goals. The Windenergie-auf-See-Gesetz3 (Wind Energy at Sea Law) and the National Wasserstoffstrategie4 (National Hydrogen Strategy) paves the way for the alternative technologies in offshore energy converting and transportation.

Therefore, information regarding the cost of production and transportation of green hydrogen to the centralized industrial production sites is necessary. 

Click below for the full Whitepaper!

Whitepaper- Hydrogen ProductionTransportation Costs.pdf

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OffsH2ore – A concept design study for offshore hydrogen production from offshore wind in island mode configuration

To achieve the climate goals and ensure the success of the energy transition in Germany, sector coupling will be essential. In this context, green hydrogen produced sustainably from renewable energies is expected to become a key pillar of the future energy system. Due to the limited availability of space as well as other challenges for the development of renewable energies on land, energy carriers such as hydrogen are being considered for import – for example from Australia or North Africa. However, hydrogen production at sea using offshore wind power with its high full-load hours offers the opportunity to cover the entire value chain at a national level. At the same time, the further growth of offshore wind capacity can be decoupled from grid expansion. Given the track record and pioneering work of the offshore wind industry in Germany, hydrogen production at sea expands the potential for promising, innovative projects in the future.

Within the project “OffsH2ore”, funded by the Federal Ministry for Economic Affairs and Energy (BMWi), for the first time, the offshore production of hydrogen from offshore wind in an island mode configuration will be comprehensively investigated. Next to the technical and economic challenges with regards to the operating conditions at sea, the concept design study will specifically address relevant questions around storage, transport and logistics of hydrogen, operation and maintenance of the offshore facilities as well as regulatory aspects. In particular, the project aims to identify innovative technical solutions related to the implementation of an integrated maritime hydrogen supply chain. By focusing on storage and transport of hydrogen in pressurised form, the chosen technical approach clearly and deliberately sets itself apart from existing project ideas and concept studies for offshore hydrogen production. The outcome of the project will be a technically and economically optimized design of an integrated offshore hydrogen production facility and related maritime logistics concept. The concept should serve as a launching point for predevelopment of pilot and full-scale projects.

With the project coordinator PNE AG, the Fraunhofer Institute for Solar Energy Systems ISE, SILICA Verfahrenstechnik GmbH, KONGSTEIN GmbH and Wystrach GmbH, the project “OffsH2ore” brings together an experienced and complementary consortium of industry partners and academia from across the value chain.

The basis for this pioneering project is an offshore wind farm which is directly connected to a 500MW electrolysis platform for the production of up to 40,000 tons of green hydrogen per year. KONGSTEIN, with its unique experience in logistics concept planning and transport & installation activities in complex offshore operations, will be responsible for the development of a hydrogen offshore logistics concept, including hydrogen loading arrangements, vessel design and transport concept from offshore site to shore.

For more information, please contact us at

Founded in 2016, KONGSTEIN provides best of class engineering and innovative consulting solutions to both the offshore renewables and the maritime industry. Our roots in Norway and Germany coupled with our decades of practical experience ensure our clients receive a solid approach to designing, operating and de-risking offshore projects.

About PNE AG
PNE AG is a clean energy solutions provider for markets and industries regionally, nationally and internationally. Its core competencies are the project planning and operation of renewable energy projects. In addition, PNE AG is advancing the storage of renewable energies and power-to-x technology. In this way, it is consistently pursuing the goal of a secure, sustainable and profitable energy supply which is fed 100 percent from renewable energies. Around 400 employees work under the umbrella of the PNE Group in 13 countries on four continents. The headquarters of PNE AG are located in Cuxhaven.

About Fraunhofer Institute for Solar Energy Systems ISE
With a staff of close to 1300, the Fraunhofer Institute for Solar Energy Systems ISE in Freiburg, Germany is the largest solar energy research institute in Europe. Fraunhofer ISE is committed to promoting sustainable, economic, safe and socially just energy supply systems based on renewable energies. Its research provides the technological foundations for supplying energy efficiently and on an environmentally sound basis in industrialized, threshold and developing countries throughout the world. Focusing on energy efficiency, energy conversion, energy distribution and energy storage, the Institute develops materials, components, systems and processes in five business areas. One particular feature of Fraunhofer ISE is its excellent technical infrastructure, which is organized into eight laboratory centers and four technology evaluation centers providing testing and experimental services on a production scale. In addition, the Institute has several accredited testing facilities. The Institute is a member of the Fraunhofer-Gesellschaft, Europe’s largest application-oriented research organization.

About SILICA Verfahrenstechnik GmbH
For more than 90 years, Silica Verfahrenstechnik GmbH has been designing and manufacturing process plants for the purification, drying and liquefaction of gases at its site in Berlin. The topic of hydrogen compression and purification has occupied the company since the delivery of the first hydrogen plant in 1941. Since that time, we built a vast number of Hydrogen units and Silica plants became a part of technological development in this field. Besides of the high-quality level and reliability of the plants Silica contributes decades of experiences in the integration of process packages into a complex overall system in compliance with current engineering standards and regulations. More recently, Silica has been involved in engineering and manufacturing of various projects for the production and further processing of “green” hydrogen.

About Wystrach GmbH
Wystrach GmbH is a full-service provider in the field of high-pressure solutions for stationary and mobile storage systems for hydrogen and other gases. The product range includes stationary bundles; containers of all sizes; tank systems for trains, buses, and trucks; and storage solutions, e.g. for power-to-gas applications as well as Plug&Play hydrogen refuelling stations. The company has 200 employees and more than 30 years of experience in this field; more than 140,000 compressed gas bundles and over 450 transport systems are on the market worldwide.

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Report on green offshore hydrogen in the North Sea: KONGSTEIN supports with hydrogen expertise

Under the project lead of Greenstat AS, KONGSTEIN´s engineers contributed to a joint reportOptimal utnyttelse av energi fra havvind i Sørlige Nordsjø II: Offshore H2-produksjon og kabel til land” with technical note on offshore hydrogen and ammonia transportation.

The report aimed to explore the optimal use of energy from offshore wind power in the Sørlige Nordsjø II area. Sørlige Nordsjø II and Utsira Nord are the two areas in the North Sea that were in 2020 opened by the Norwegian government for offshore energy production, including offshore wind power. Together, the areas allow for capacity of 4 500 MW of wind power. The characteristics of Sørlige Nordsjø II area make it possible to combine offshore wind energy production with hydrogen production.

KONGSTEIN provided a comprehensive examination of hydrogen derivates assessing their advantages and disadvantages in light of offshore production. Further, KONGSTEIN’s contribution to the main report focused on transportation vessel characteristics, loading and unloading arrangements, offshore bunkering and risks assessment.

You can find more information about the project and read the report here: (in Norwegian).



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KONGSTEIN and Polish Inter Marine sign an offshore wind cooperation agreement

(Bergen/Gdynia) KONGSTEIN AS, provider of technical advisory and project management services to the offshore renewables industry, and Inter Marine Sp. z o.o., provider of offshore service, have entered into a cooperation agreement to provide combined services to the Polish offshore renewable market.

Inter Marine has many years of experience and excellent reputation on the Polish marine industry market. KONGSTEIN brings its wealth of experience from the offshore renewable industry in Norway, Germany and other European countries into the partnership.

Managing Director of KONGSTEIN AS Rune Tvedt: “As one of the first Norwegian consultancies dedicated to serve the offshore renewable industry, we are today proud to share our learnings with our Polish partner. This has worked brilliantly between the two countries in the shipping and Oil & Gas industry, and KONGSTEIN will do the best to continue this relationship in the maritime renewable industry.”

President of Inter Marine Group Slawomir Kalicki: “With over 30 years of experience in various areas of the maritime industry we are delighted to enter into a partnership agreement with KONGSTEIN to develop Inter Marine’s knowledge and market position in the emerging Polish wind offshore sector. The cooperation will also focus on mutual development of hydrogen projects. Bringing KONGSTEIN’s knowledge and experience to the local market will be beneficial to the entire Polish wind offshore and hydrogen market.”


Founded in 2016, KONGSTEIN provides best of class engineering and consulting solutions to both the offshore renewables and the maritime industry. In offshore renewables, KONGSTEIN focuses on project developers, turbine manufacturers and operators/asset owners. KONGSGTEIN enables the green shift in the energy industry by supporting clients striving towards a sustainable use of resources. 

About Inter Marine

Inter Marine (est. 1990) provides services for maritime industry. Business activities are focused on shipping and logistics operations, crew management and marine engineering services. Company’s headquarter is in Gdynia, Poland.

Dynamic and continuous growth, company owns to a team of highly skilled and experienced personnel, as well as to the support from customers and partners with whom we build long term business relations.


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Photo © Martin Neumann

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KONGSTEIN is a Founding Member of AquaVentus: Green Hydrogen in the North Sea

We believe in the green shift in the energy industry. In our opinion, green hydrogen will be part of this process, which is why we joined AquaVentus.

AquaVentus is an amazing initiative of several projects for the offshore generation of green hydrogen in the North Sea. These projects bring together leading companies in the energy industry to start realising the path towards low-carbon economy.

Interested to learn more? Find more information in the press release attached below, or reach out to Erik Pietsch.

Photo © AquaVentus

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CuxH2aven – Hydrogen Strategy Development

Hydrogen as a new part of the DNA of the municipality Cuxhaven

KONGSTEIN is pleased to have supported the city of Cuxhaven in their Hydrogen Positioning Strategy 2020 

The German municipality and coastal city of Cuxhaven initiated several working groups, studies and projects on how to implement hydrogen into their infrastructure, with the target of boosting their economy and leading Germany as a showcase city in the transition to hydrogen. KONGSTEIN supported with the further development of existing documents while focusing on the market potential for hydrogen applications, the local circumstances and comparable hydrogen projects, as well as consulting on potential best-fit pilot projects for the city and how to implement those. 

Do you want to learn more on KONGSTEIN’s support of maritime and offshore hydrogen? Reach out to our Project Engineer, Bonke Jensen, who is happy to answer your questions. 

Photo © City of Cuxhaven

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