Public procurement notice: Contract Notice
Published: 2025-03-17
Buyer: TenneT TSO B.V.
Country: NL
Region: NL224
Contract type: Services
Procedure: Open procedure
CPV classification: 34512000 | 60000000 | 76522000
Estimated value: 5300000 EUR
Submission deadline: 2025-04-29
Award criteria: quality

Technical requirements: TenneT TSO B.V. (Client), as the responsible Transmission System Operator (TSO), is obliged to connect offshore wind farms in the Dutch North Sea to the onshore HV-power grid. Client is managing the operations of its Dutch Offshore High Voltage Substations, via the extra-high voltage cable connections from sea to land, also called a grid connection systems (GCS). The surrounding offshore wind farms (OWF) are erected and operated by third parties. Each OWF is connected to a Client owned GCS via a OHVSS. In the Netherlands Client will operate and develop - as contribution to the Energy Agreement - at least 7 independent 700MW offshore GCS’s by 2025, by means of a standardized OHVSS. Future developments as from 2025 include 7 independent 2 GW GCS’s, each with a standardized DC OHVS. These DC systems are located further offshore and for now are not included in the service scope . By means of the National Energy Agreement, the Dutch government wants to achieve a substantial increase in the share of wind energy in the Netherlands’ energy mix. To increase offshore wind energy capacity, the government has designated zones in the North Sea for the development of new wind farms. This initiative is commonly known as "Net Op Zee". With standardized offshore grid concept, TenneT will transmit the offshore wind energy onshore, to its high voltage substations. From there, the high-voltage grid will distribute the wind energy to end users. The TenneT TSO B.V. (TenneT) business unit Grid Field Operations Offshore Netherlands (GON) also internally know as Offshore - Area West is the organizational unit managing the operations of the Dutch Offshore High Voltage Substations (OHVS) including associated export cables from sea to land, also called a Grid Connection System (GCS). For this tender we are looking for one party that can provide the year round (365 days - annually) Crew Transfer Vessel services to the following grid connections/platforms: - Borssele Alpha - Borssele Beta - Hollandse Kust Zuid Alpha - Hollandse Kust Zuid Beta - Hollandse Kust Noord Alpha - Hollandse Kust West Alpha - Hollandse Kust West Beta from June 2025 to June 2027 with the option to extend the contract with one full year.
Crew Transfer between port of Vlissingen or IJmuiden to offshore platform locations (see Scope of Services)
The contract is from June 2025 to June 2027 with the option of an extension of 1 year.

Eligibility requirements: See Mercell
see Mercell
TenneT TSO B.V. (Client), as the responsible Transmission System Operator (TSO), is obliged to connect offshore wind farms in the Dutch North Sea to the onshore HV-power grid. Client is managing the operations of its Dutch Offshore High Voltage Substations, via the extra-high voltage cable connections from sea to land, also called a grid connection systems (GCS). The surrounding offshore wind farms (OWF) are erected and operated by third parties. Each OWF is connected to a Client owned GCS via a OHVSS. In the Netherlands Client will operate and develop - as contribution to the Energy Agreement - at least 7 independent 700MW offshore GCS’s by 2025, by means of a standardized OHVSS. Future developments as from 2025 include 7 independent 2 GW GCS’s, each with a standardized DC OHVS. These DC systems are located further offshore and for now are not included in the service scope . By means of the National Energy Agreement, the Dutch government wants to achieve a substantial increase in the share of wind energy in the Netherlands’ energy mix. To increase offshore wind energy capacity, the government has designated zones in the North Sea for the development of new wind farms. This initiative is commonly known as "Net Op Zee". With standardized offshore grid concept, TenneT will transmit the offshore wind energy onshore, to its high voltage substations. From there, the high-voltage grid will distribute the wind energy to end users. The TenneT TSO B.V. (TenneT) business unit Grid Field Operations Offshore Netherlands (GON) also internally know as Offshore - Area West is the organizational unit managing the operations of the Dutch Offshore High Voltage Substations (OHVS) including associated export cables from sea to land, also called a Grid Connection System (GCS). For this tender we are looking for one party that can provide the year round (365 days - annually) Crew Transfer Vessel services to the following grid connections/platforms: - Borssele Alpha - Borssele Beta - Hollandse Kust Zuid Alpha - Hollandse Kust Zuid Beta - Hollandse Kust Noord Alpha - Hollandse Kust West Alpha - Hollandse Kust West Beta from June 2025 to June 2027 with the option to extend the contract with one full year.
Crew Transfer between port of Vlissingen or IJmuiden to offshore platform locations (see Scope of Services)
The contract is from June 2025 to June 2027 with the option of an extension of 1 year.