References & Press

Our Projects.

ONP examines the production and use of green H2 for Gräper’s sand-lime brick plants

Hamburg/Ahlhorn. ONP Management has conducted a feasibility study on the "Generation and Use of Hydrogen in Sand-Lime Brick Plants" for Beton- und Energietechnik Heinrich Gräper GmbH & Co. KG. The study focused on the technical feasibility and economic viability of various concepts related to green hydrogen.

By evaluating different generation and consumption scenarios, ONP was able to define possible measures to reduce the CO2 emissions related to the production of sand-lime bricks. One possible scenario was the use of green hydrogen instead of natural gas in the combustion process of the steam generator. Another promising approach is the use of green hydrogen as a storage to provide the Electricity Balancing Market with control energy.

Overview Gräper at Boesel
(Source: Gräper)
» view Gräper homepage

Sand-lime bricks for house construction
(Source: Ratgeber Traumhaus website)
» view website

Fabrication scheme for sand-lime bricks

ONP mandated for due diligence in Japan's first public auction

Hamburg/Tokyo. In close cooperation with ClassNK ONP advised a Japanese EPCI-Contractor on technical and commercial aspects for developing an Offshore Wind Farm in the Japanese open sea area. During preparation of bidding documents for Japan`s first public auction, the advisors of ONP executed a due diligence (DD) of the existing concept and provided their advice and expertise, providing insights into latest industry standards and construction techniques from current developments in Europe and Taiwan.

A stringent and efficient know-how-transfer was made possible with support from our colleagues at ClassNK. In times of Covid-19 regular online-conferences were conducted, which focused on individual review-topics of the DD-process. ONP’s findings, suggestions and additional input were presented and discussed, enabling our client to draw valuable conclusions and flag areas which needed further attention.

Offshore Wind in waters of Japan
(Source: Japan Wind Power Association)

JWPA Development Objectives for Offshore Wind
(Source: Japan Wind Power Association)
» JWPA Homepage

Present Status and Promotion Measures for the introduction of Renewable Energy in Japan
(Source: Japan Wind Power Association)
» Ministry of Economy, Trade and Industry, Japan

ONP mandated for claim management at "BER Terminal 2" Project

Hamburg/Berlin. During construction of Terminal 2 at the new Berlin Brandenburg Airport (BER) a team of ONP-experts was assigned by our sister-company Zechbau GmbH to take care of the project’s Claim Management.

ONP was responsible for organizing and structuring all processes involved in claim detection, preparation and processing towards the client Flughafen Berlin Brandenburg GmbH. This included the correct contractual and legal notification towards the client, as well as the establishment of profound and substantiated factual reports to support each individual case and to discuss the respective claim offers with the involved parties.

Facade at Terminal 2 shortly before the completion and transfer
(Source: Zechbau GmbH)
»Press at Weserkurier 18.09.2018: Zech builds Second BER terminal (German)

Final construction works at Terminal 2
(Source: Zechbau GmbH)

Terminal 2 waiting area
(Source: website BER Flughafen Berlin Brandenburg)
» BER website

You can find the Site plan of Terminal 2 at the BER website » here

Airport location map of BER (Source: homepage BER Flughafen Berlin Brandenburg)


Section 4 "Weser Crossing Bremen-Gröpelingen - Bremen-Seehausen" in the course of the highway A281 interconnection project in Bremen, the four-lane new construction between first construction phase of the A281 and the B 6n (feeder Arsten)

Hamburg/Bremen. After a two year acquisition phase ONP Management GmbH and its Joint Venture partner IMDC (International Marine and Dredging Consultants) are now performing the overall Construction Management and Site Supervision for the BA4 Wesercrossing Project in Bremen. Together with SiteLog, ONP is the second company within the Zech Group awarded by DEGES for the Wesercrossing infrastructure Project.

"For us, this contract not only means an excellent reference, it also marks our planned entry into the steadily growing market of construction management and site supervision services for challenging civil projects in Northern Germany," Martin Rahtge states in regard to the upcoming Project.

North access to Tunnel

Visualization of the housing to protect against dust from a slag dump, view towards Seehausen
(Source: DEGES)

Tunnelportal North

Visualization of the north tunnel portal with a view towards Seehausen
(Source: DEGES)

Intersection A281

Visualization of the A281 highway intersection Gröpelingen
(Source: DEGES)

Works commenced in January 2020 immediately after the order was placed and will continue until 2025. More information about the project can be found in the (German) » DEGES brochure or at the DEGES homepage


Overview and Plan of Wesercrossing Project (Source: Weserkurier)


Hamburg/Cuxhaven. Plambeck Emirates Global Renewable Energy LLC has signed a letter of intent with Italian Saipem Group for the construction of a floating 500 MW offshore wind farm off the coast of the Kingdom of Saudi Arabia. Saipem is a worldwide player in the field of engineering, drilling and construction of energy infrastructure systems and the oil and gas sector. The Italian group with a turnover of approx. 8.5 billion EUR (2018) will build the floating offshore wind farm as an EPCI contractor.

ONP was awarded by Plambeck Emirates Global Renewable Energy LLC for technical Project Management from the development to the implementation of this floating offshore wind project in the future wind energy market of Saudi Arabia.

The development of renewable energies is part of the "Vision 2030" in Saudi Arabia.

Plambeck Emirates (PE)

Plambeck Emirates Global Renewable Energy LLC
» PE Homepage

Saipem Hexafloat

Visualization of foundation concept
(Source: Saipem)

Vision 2030

Vision 2030 is a bold yet achievable blueprint for an ambitious nation.
(Source: Vision 2030 Homepage)
» Vision 2030 Homepage

For further information about this innovative project please refer to the » Saipem Homepage

Visualization of the Saipem Hexabase Project (Source: Saipem)


Hamburg/Cuxhaven. The project developers AFH - Alter Fischereihafen Cuxhaven GmbH and Hotel Alter Fischereihafen GmbH - are planning a comprehensive redevelopment of the entire complex of the existing Old Fishing Port area in Cuxhaven. As part of this conversion, the change in use of the adjacent buildings around the aging fishing port is envisaged. The later use of the building is characterized by hotel and restaurant business as well as by trade and retail.

Essential components of this comprehensive redevelopment are the reconstruction of the existing quay walls and the construction of a framing underground car park as an integrated engineering structure. The new front edge of the quay wall is shifted by approx. 4 m in the direction of the harbor basin compared to the current state. This creates additional spaces in front of the adjacent buildings.

Already in April 2018, ONP was awarded by AFH to carry out project management services as owners engineer for this subproject.

In addition, the client AFH intends in particular the construction of a hotel complex by conversion of the existing fish auction halls V and IV adjacent to the President-Herwig-Straße. The construction includes the renovation of the named fish auction halls, the expansion of the first floor to a hotel, the establishment of a so-called living hall on the ground floor with reception / lobby, lounge and dining area and adjoining outdoor market hall. The remaining ground floor space will be redesigned for restaurants and retail outlets.

As an extension ONP was awarded project management services for the Hotel Alter Fischereihafen in February 2019. The performance of both mandates is still ongoing.

AFH Cuxhaven

Evenening scene the old fishery port "Alter Fischereihafen" in Cuxhaven
(Source: flickr, Matthias Hinken, 2018)


The new face of the old port "Alter Fischereihafen" in Cuxhaven
(Source: Alter Fischereihafen Cuxhaven GmbH)

AFH - Technical

Technical concept planning for the port refurbishment with subsurface parking lot along the quaywalls

For further information please refer to the » AFH Homepage


Visualization of AFH Project (Source: Alter Fischereihafen Cuxhaven GmbH)


Acting as lead manager Talanx is financing a further offshore wind farm.

Hamburg. Already in May 2017, ONP Management GmbH was mandated by Talanx as Lenders Technical Advisor for the project Borkum Riffgrund 2. Borkum Riffgrund 2 comprises the construction of 56 wind turbines with a combined output of 450 megawatts. As lead manager of the transaction, Talanx has successfully coordinated a double-digit group of institutional investors ranging from six countries across Europe. Supported by ONP acting as the Lenders Technical Advisor Talanx has coordinated EUR 832 million of senior bond financing to the Borkum Riffgrund 2 offshore wind farm which enabled Global Infrastructure Partners (GIP) to acquire a 50 percent share in the wind farm owned by Danish energy supplier Ørsted (formerly DONG Energy), with a transaction volume of EUR 1,170 million. The bond has a maturity of 10 years.

In addition to German insurance companies and asset managers, further institutional partners include banks and European institutional investors, amongst them: DekaBank, Edmond de Rothschild AM’s BRIDGE platform, La Banque Postale Asset Management, NN Investment Partners and Wiener Städtische Versicherung.

DolWin Gamma

ACDC Converterstation DolWin-3 during installation, Offshore Windfarm Borkum Riffgrund 1 in the background

Suction Bucket Jacket

Installation of the Suction Bucket Jacket prototype on Borkum Riffgrund 1
(Source: Orsted)


Neighboring Offshore Windfarm Borkum Riffgrund 1

Headquartered in Denmark, Orsted employs more than 5,600 people worldwide. Orsted shares are listed in Nasdaq-Copenhagen (Orsted). In 2016, the company generated sales of 8.2 billion Euros. In Orsted's offshore wind farm Borkum Riffgrund 1, an innovative foundation technology using a three-legged "Suction Bucket Jacket" was tested which is now being used at Borkum Riffgrund 2 on a larger scale in addition to the proven monopile foundation technology. GIP is a leading global, independent infrastructure investor that invests in energy, transportation and water / wastewater and currently manages approximately $ 43.4 billion for its investors. GIP's portfolio includes companies with annual revenues of over $ 35.1 billion and approximately 47,100 employees.


Taiwan Green Power is participating in the first round of grid allocation in Taiwan.

Hamburg/Taipei Taiwan Green Power (TGP) has assigned ONP Management GmbH as Owner's Engineer for their 600MW Offshore Wind Farm Haixia (Zone #28) off the west coast of Taiwan. Recently, TGP has reached EIA-approval by Taiwan's Environmental Protection Agency and, hence, is allowed to participate in next year's grid allocation round, which is run by the Bureau of Energy (BoE). The assignment was concluded after the parties had signed a general Framework Agreement for consulting services in October this year.

As a first task, ONP will execute a FEED-study, including an Energy Yield Assessment, concept designs and financial evaluation of the windfarm to determine the optimum technical setup and layout for the project. Subsequently, ONP's interdisciplinary team of Offshore Wind Experts, located in Taiwan and Germany, will prepare the technical input for the required BoE-report, which has to be handed in by TGP as part of their request for grid connection. Further, ONP will support the other local project partners with its expertise and experience.

After and in case the project has received grid allocation, ONP will be responsible for the project management, will execute the technical development and bring OWF Haixia to Financial Close.

Please refer to the letter of reference by Taiwan Green Power

Haixia (Zone 28)

Zone #28 is located 14 km of the coast of Changhua County, a central region on the west coast of Taiwan. The project area is about 55 km² with water depths varying between 22m and 38m.

Signing Ceremony

General Framework Agreement signed with Taiwan Green Power (TGP) in October 2018.


Completed BoE-Report for TGP's 600MW Offshore Wind Farm Haixia (Zone #28).

Taiwan Green Power is a domestic developer of green and clean power.
The company focuses on developing energies for wind power generation and any renewable energy sources in Taiwan and improving the sustainable utilization and development potential of green power, in order to establish a friendly environment with the contribution to the society and the economic prosperity in Taiwan.
» TGP homepage

In 4th Quarter of 2017 ONP provided consultancy services to Chu Feng Power Corporation for its offshore project "Offshore Windfarm Chu Feng".
The services included technical and commercial evaluation of the 450MW windfarm in the Taiwan Strait and a FEED-study serving as a basis for the further development of the windfarm.

Please refer to the letter of reference of Chu Feng Power Corporation.

KNK Wind thanks ONP for good co-operation

Hamburg. Since April 2016 during development of one of the most technically demanding offshore wind projects in the Baltic Sea, the 350 MW Arcadis Ost 1 offshore wind farm project, the experienced ONP team has been supporting the project developer KNK Wind GmbH while gearing up for the first German auction.

With its market-penetrating network ONP has also successfully initiated and conducted negotiations with investors, thereby preparing the business case for a KNK guided participation in the 1st German auction for offshore wind projects.
Finally KNK was in a position to win an investment partner providing the necessary funds for the submission of an offer based on the technical foundation concepts developed by ONP.

Please refer to the letter of reference by KNK Wind GmbH

Final Taking-Over at Gode Wind 1

The construction phase of the offshore wind farm project "Gode Wind 1" has been successfully completed.

ONP congratulates all project participants on the recent completion of the construction works and the Final Taking Over on 03.02.2017. With a capacity of 355 MW, the wind farm developed by the Danish utility DONG will be among the largest in the German North Sea. The offshore windfarm is equipped with modern 6 MW Siemens wind turbines, type SWP-6.0-150.
The "Final Taking Over Date" has occurred on February 3rd, 2017.

In the early phase of the project end of 2015 ONP Management GmbH has been mandated by a group of institutional investors led by Talanx Asset Management GmbH as the Lenders Technical Advisor (LTA).

After the successful Taking-Over ONP will continue to independently advise the lenders' group on all technical matters during the operation of the offshore wind farm over a period of about ten years. Our team is strongly focused on the relevant technical, commercial, environmental and operational aspects of the project.


Offshore Windfarm Gode Wind 1
(Source: DONG Energy)


Pile-driving of Monopiles with Big Bubble Curtain and IHC-NMS noise mitigation system
(Source: DONG Energy)


The GIP-Talanx "Tombstone" for a successful transaction


Milestone on the way to the realization of the offshore windproject Merkur Offshore

Hamburg. ONP Management GmbH (ONP) congratulates the shareholders of Merkur Offshore GmbH for the recently achieved final confirmation of financing its 396 MW Merkur offshore wind development project. The Merkur Offshore wind farm will be one of Germany's largest wind farms utilizing 66 state of the art Haliade 150-6MW offshore turbines from GE, installed by GeoSea, member of the DEME Group.

Several major tasks had to be tackled successfully since ONP's assignment in early 2015. After re-structuring the project team and seconding experienced offshore wind experts, a re-arrangement of the group of investors and developers took place. This resulted in the commitment of close to EUR 500 million in equity by a consortium of five sponsors, comprising of:

  • Partners Group
  • InfraRed Capital Partners
  • DEME Concessions Wind
  • GE Energy Financial Services
  • L’Agence de l’environnement et de la maîtrise de l’énergie (ADEME).

The achieved commitment of approximately EUR 1.2 billion of senior secured debt to the project by a group of nine leading international and local banks, marks the latest step for a total capital investment of ca. EUR 1.7 billion into the development of Offshore Wind in Germany.

Mr. Martin Rahtge, Managing Partner of ONP, said: "ONP is very proud to have contributed to this milestone with its staff of engineers over the last 1.5 years. To have finally reached this milestone is a great success for the complete project team and all parties involved. After having accompanied and fostered the projects development over a long time, it is a satisfying proof, that with enthusiasm and commitment to Offshore Wind, we can achieve the transition to clean energy production which is bankable, payable and creates a solid heritage for generations to come."

ONP is part of the Zech Group, with its headquarters in Hamburg. The company was founded in 2014 and is delivering technical advisory and consulting services for Offshore Wind projects. ONP has more than 35 employees, who have been involved throughout their professional career in the development and installation of more than 4.500 MW of offshore wind power. Its senior experts have more than 12 years of individual practical experience in the area of project development and realization of such projects.

Mr. Arjen Schampers, project director of Merkur Offshore, added: ONP Management and its experienced and devoted staff have been a great asset for the project team in the successful technical development of Merkur Offshore. The main tasks such as handling time critical major design changes, negotiation and finalization of major contracts for Balance of Plant and Wind turbines, as well as the development of a detailed project plan where performed to our full satisfaction. We are looking forward to continuing the excellent cooperation with ONP Management in the further development of Merkur Offshore and we can highly recommend ONP Management.


Holger Römer
ONP Management GmbH
c/o Zech Group GmbH
Head of Corporate Communication
August-Bebel-Allee 1, 28329 Bremen
Phone: +49 (0) 421 41007-113
Mobile: +49 (0) 151 11720982


Installation of Monopile foundations with Jackup installationvessel INNOVATION
(Photo: Wolfhard Scheer)


Installationvessel INNOVATION with noise mitigation system IHC-NMS and Big Bubble Curtain, in the background BARD 1 windfarm
(Photo: Wolfhard Scheer)

MP installed

Monopiles after installation
(Photo: Wolfhard Scheer)

ONP commences R&D project activities at OWS-MV

ONP is granted formal approval for research project on 30.09.2015

Hamburg. In one of the largest German research projects ONP Management being one of a total of 17 alliance partners initiated first development activities. The project is funded by the German Federal Ministry of Research and Education (BMBF) and was formally started in November 2016 with a term of three years.

On the homepage of the Alliance you will find more information about the current status of the R&D project:

The innovation-alliance "OWS-MV Offshore Wind Solutions Mecklenburg-Vorpommern" consists of 17 partners, including 15 industrial and engineering companies as well as 2 public research facilities. The alliance has clearly defined its goal of providing a substantial contribution to the future energy mix by developing innovations for renewable offshore wind energy in Germany and Europe. In particular the alliance faces those many challenges that have to be overcome economically developing sites for offshore wind parks with great coastal distance and water depths of more than 40 meters combined with difficult soil conditions.

A major share of the funding is coming from the federal support program "Unternehmen Region", the innovation initiative for the "New Federal States" of Germany. For 2016 the federal government plans an increase of the annual funds by 10 million euro to a total of 159 million euro. The Alliance is well positioned in the attractive growth market for renewable energy, in particular offshore wind energy and is pursuing the goal of ensuring long-term sustainable economic development by leveraging innovation potential and strengthening cooperation between the alliance partners.

For more information please refer to the federal website "Innovative regionale Wachstumskerne" of the Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung - BMBF).


For the first time Talanx is financing an offshore wind farm with a structured bond

Hamburg. ONP Management GmbH was appointed Lenders Technical Advisor for Talanx Asset Management GmbH, acting as the leader of a group of institutional investors. Talanx has co-ordinated the project financing for the construction and operation of the offshore wind farm Gode Wind 1 winning the "Europe Renewables Deal of the Year 2015" award as a result. The prize for the best financing transaction in renewable energies is awarded annually by trade magazine Project Finance International (PFI).

By co-ordinating a structured bond of EUR 556 million to finance Global Infrastructure Partners’ fifty percent acquisition of DONG Energy’s Gode Wind 1 offshore wind farm, Talanx acquired a new role on the market. This is the first time that a group of institutional investors under the leadership of an insurer has financed an offshore wind power project. The bond has a maturity of 10 years. For the first time an institutional consortium led by an insurer is financing an offshore wind energy project.
The institutional consortium consists of the following 5 main partners:

  • Talanx Asset Management GmbH
  • SIGNAL IDUNA Asset Management GmbH
  • Versicherungskammer Bayern
  • Gothaer Krankenversicherung AG
  • Metzler Investment GmbH

ONP is member of the Zech Group, with its headquarters in Hamburg. The company was founded in 2014 and is delivering technical advisory and consulting services for Offshore Wind projects. ONP has more than 35 employees, who have been involved throughout their professional career in the development and installation of more than 4.500 MW of offshore wind power. Its senior experts have more than 12 years of individual practical experience in the area of project development and realization of such projects.

Please refer to the Talanx letter of reference