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4C is now TGS

We are excited to announce a significant milestone in 4C Offshore's journey. Our integration into the TGS family marks the beginning of a new era in offshore wind market intelligence.

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01 Mar 2024: Update 10/1/2024: The tenders have been delayed due to lack of agreement on the framework for the projects. Tenders are expected to be sent out in the Spring. Update 10/10/2022: Tender for Hesselo OWF to start at the end of 2023 and to be completed with a winner determined by the end of 2024. Update 25th June 2022: Under the new Climate Agreement, the coalition government have decided to relocate the Hesselø Offshore Wind Farm to an area south of the original Hesselø area. The concrete timetables for the tender and for the construction work itself will be announced later this year. Update Autumn 2021: The DEA hopes to reach a decision allowing it to restart the tender process mid-2022 and sign the concession contract by end-2023. Update 25th June 2021: The Danish Energy Agency has announced that the tender for the Hesselø Offshore Wind Farm will be suspended until additional analysis of the seabed is conducted by Energinet. These analyzes are expected to be completed in the autumn of 2021, after which the Danish Energy Agency expects to initiate a new market dialogue to discuss the consequences of the results with market participants. Hence tender timeline has been delayed. Original Tender Schedule: Q2 2021: Publication of a Prior Information Notice specifying the overall nature and scope of work. Q3 2021: Publication of the Contract Notice, tendering material including draft concession agreement, draft licences, etc. and launch of pre-qualification. Q4 2021: Deadline for pre-qualification application Q4 2021: Result of pre-qualification and call for preliminary bids. Q1 2022: Deadline for the prequalified tenderers to submit preliminary bids (for negotiation). Q2 2022: Tender negotiation process. Q3 2022: Publication of the final tendering conditions and call for final bids. Q4 2022: Deadline for final bids. Q4 2022: Announcement of the concession winner.
Development Zone
1200 MW
4C Offshore | Location Map: Lat(56.353) Lon(11.690)

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Power & Turbines
Windfarm Capacity
1200 MW
Turbine Model
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Other Turbine(s) Used
Min. Turbine Capacity (MW)
Max. Turbine Capacity (MW)
Min. Number of Turbines
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Max. Number of Turbines
Total Turbine Height
Hub Height
Rotor Diameter
Foundation Type
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Foundations on Wind Farm
Foundation Comments

Location & Environment
Sea Name
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Depth Range (Chart Datum)
Depth Range (Stated by Developer)
Distance from Shore (Developer)
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Distance from Shore (Computed)

Installation Base
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Ops and Maintenance
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Number of Offshore Platform(s)
Shared Platform Type
Grid Connection Point
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Cable Landing Point

Export Cables (AC & DC)
Number of Export Cables (AC)
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Average Length per Cable (AC)
Additional Requirements (AC)
Nominal Voltage (AC)
Number of Export Cables (DC)
Average Length per Cable (DC)
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Additional Requirements (DC)
Nominal Voltage (DC)

Nominal Voltage

Onshore Cables
Number of Onshore Cables
Average Length per Cable
Expected Life