The MaresConnect 750MW HVDC Interconnector System
Buyer: MaresConnect Limited (MCL)
- Published
- 29 September 2026
- Estimated value
- €1,000,000,000
- Place of performance
- IE061
- Procedure
- Negotiated procedure
- Documents
- 1
- Notice number
- 00667588-2026
- Reference
- b2e4d9c7-5a31-4f86-8c0e-1a7b3d5e9f24
- Official source
- Official source
CPV codes
- 45231400Construction work for electricity power lines
Description
The MaresConnect Project is a proposed 750 MW, 320 kV High Voltage Direct Current (HVDC) electricity interconnector linking Denbighshire, Wales and North County Dublin, Ireland. Developed by MaresConnect Limited, a joint venture between Foresight Group Holdings Ltd and Etchea Energy Nominees Ltd, the project will transmit electricity via approximately 240 km of subsea and underground cables between new converter stations on each side. It aims to enhance security of supply, market integration, and renewable energy utilisation between the Irish and GB grids. MaresConnect shall utilise Voltage Source Converter (VSC) technology and the configuration shall be a Symmetrical Monopole. The rated DC voltage shall be +/-320 kV. The link shall be bi-directional and shall have a rated power (receiving end) of 750 MW. The project is being procured as separate EPC (Turnkey) contracts, divided into four lots: LOT 1A: EPC for two HVDC Converter Stations; LOT 1B: EPC for one Irish 400kV AC Tail Substation; LOT 2A: EPC for the HVDC subsea and underground cable system, and for the HVAC underground cable system in Wales (Bodelwyddan); LOT 2B: EPC for the supply and installation of HVAC cable system in…
Lots (4)
| Lot | Description | CPV code | Amount |
|---|---|---|---|
| 1 | LOT 1A: EPC for HVDC Converter Stations | 45232221 Transformer substation | — |
| 2 | LOT 1B: EPC for Irish 400kV AC Tail Substation | 45232220 Substation construction work | — |
| 3 | LOT 2A: EPC for the HVDC Subsea and Underground Cable System, and for the associated HVAC Underground Cable System | 45314310 Installation of cable laying | — |
| 4 | LOT 2B: EPC for the HVAC underground cable system in Ireland (Dublin) | 45314310 Installation of cable laying | — |
Award criteria
- Quality — Price is not the only award criterion and all criteria are stated in the Procurement Process documents.
- Quality — The most economically advantageous tender in terms of the criteria stated in the specifications, in the invitation to tender or to negotiate or in the descriptive document.
- Quality — Price is not the only award criterion and all criteria are stated only in the procurement documents.
- Quality — Price is not the only award criterion and all criteria are stated only in the procurement documents.
Official publications
- TED · 00667588-2026 · 29 September 2026
- OJS · 188/2026 · 29 September 2026
Other tenders from MaresConnect Limited (MCL)
Frequently asked questions
- What is the estimated value of this tender?
- The estimated value published by the buyer is €1,000,000,000.
- Who is the buyer of this tender?
- The contracting authority is MaresConnect Limited (MCL) (European Union).
- How can I bid for public tenders in the European Union?
- Bids are submitted through the official public procurement portal in the European Union. El Vínculo helps you find tenders and analyse their documents; submission always happens at the official source.
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