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Wind
Oil & Gas
Blog
Sylwin Alpha Converter Station is located offshore Germany. It connects the turbines to the onshore grid of Germany.
5/2/2025

Conbit Awarded Lot 1 Contract for ICCP System Supply and Commissioning at at SylWin alpha

Conbit is proud to announce that it has been awarded Lot 1of the ICCP Retrofit project at the at SylWin alpha Offshore Converter Station,operated by TenneT. This contract highlights Conbit’s expertise in upgradingoffshore wind assets and its commitment to supporting the renewable energysector.

The ICCP System of Deepwater allows for cathodic protection away from the offshore asset. This makes installation and mainteannce a lot easier.

The project aims to protect the substation’s jacket structure against corrosion and ensure its operational integrity for at least 25 years. Conbit’s scope includes the design, delivery, and above-water installation of an Impressed Current Cathodic Protection (ICCP) system, along with the training of TenneT service group members on its usage and monitoring.

Innovative Technology for Long-Term Protection

To deliver a cutting-edge solution, Conbit has partnered with Deepwater Europe Ltd., which will supply its advanced RetroBuoy ICCP system. The RetroBuoy system is designed to provide effective and reliable cathodic protection, ensuring the jacket structure achieves protection levels between -800 mV and -1100 mV, verified by reference anodes.

In addition to its robust performance, the ICCP system features a human-readable interface, enabling efficient monitoring and the forwarding of data to third parties for interpretation. Conbit will ensure that the system meets certification requirements from Lloyd’s Register (LR) and fulfills BSH standards for underwater corrosion protection.

Two Lots, One Goal

The ICCP Retrofit project is divided into two lots:

  • Lot 1: Managed by Conbit, this includes the design, supply, and above-water installation of the ICCP system, along with the provision of major construction components.
  • Lot 2: Awarded to another contractor, this includes vessel charter and subsea installation, such as cable laying, cable protection, and connecting the ICCP system components to the jacket structure.

Together, these efforts will ensure comprehensive and long-lasting corrosion protection for the at SylWin alpha Offshore Converter Station.

A Trusted Partner for Offshore Wind Upgrades

Conbit’s Commercial Director, Bram van Oirschot, shared the significance of this award: "This project demonstrates Conbit’s strong position in upgrading, maintaining, and modifying offshore wind assets, especially substations. By integrating innovative technology like Deepwater Europe’s RetroBuoy system, we continue to support the industry in addressing the growing need to upgrade aging offshore infrastructure. We are proud to collaborate with TenneT on this important project, which reinforces our commitment to delivering sustainable and reliable solutions for the offshore wind sector."

Enhancing Offshore Wind Infrastructure

The at SylWin alpha Offshore Converter Station is a critical component in TenneT’s offshore grid infrastructure, connecting renewable energyfrom offshore wind farms to the onshore grid. As the offshore wind industrycontinues to expand, maintaining and upgrading existing assets is essential to ensure their long-term efficiency and reliability. Conbit’s expertise in engineering and executing innovative offshore solutions positions the company as a trusted partner in supporting the renewable energy transition. This project reflects Conbit’s commitment to enhancing the performance and longevity of offshore wind facilities, helping the industry meet its sustainability goals.

About Conbit

Conbit specializes in delivering engineering solutions forthe offshore energy sector, with a focus on maintenance, upgrades, and modifications of offshore assets. By combining innovation, technical expertise, and a commitment to excellence, Conbit continues to support the offshore wind industry in achieving its operational and sustainability objectives.

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The Retrobuoy sysstem is installed directly from a vessel and is positioned at the seafloor.

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Bram van Oirschot

Commercial Director

General

Conbit B.V.

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Bram van Oirschot

Bram van Oirschot

Commercial Director