The MaresConnect 750MW HVDC Interconnector System
Tender Summary
The MaresConnect Limited (MCL) in Ireland from Europe region has released this tender for 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 Ireland (Dublin). The contract model for the lots will be amended FIDIC Conditions of Contract for EPC/Turnkey Projects (Silver Book). MaresConnect has conducted Preliminary Market Engagement prior to publication of this Contract Notice and encourages further collaboration between OEMs and Construction Contractors to establish bidding arrangements in time for the next step of the Procurement Process (notably the Pre-Qualification Questionnaire). with tender notice no. 681481-2026 published on 07 Oct 2026. The tender is due to expire on 31 Oct 2026. This tender is sourced from TED Europa and is eligible for suppliers interested in Construction work for electricity power lines. Interested bidders can obtain further information including complete bid documents or ways to participate by registering on Tender Impulse and referencing via Tender Impulse ID 15302304.
Tender Details
Tender NoticeTI Ref: 15302304
Tender Notice No
681481-2026
Tender Organisation
MaresConnect Limited (MCL)
Tender Sector
Tender Service
Worldwide
Tender Region
Tender Project Location
Tender CPV
45231400 : Construction work for electricity power lines
Tender Source
TED Europa
Estimated Budget
1,000,000,000
Tender Document Type
Competition
Tender Deadline
31 Oct 2026 19 days left
Tender 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 Ireland (Dublin). The contract model for the lots will be amended FIDIC Conditions of Contract for EPC/Turnkey Projects (Silver Book). MaresConnect has conducted Preliminary Market Engagement prior to publication of this Contract Notice and encourages further collaboration between OEMs and Construction Contractors to establish bidding arrangements in time for the next step of the Procurement Process (notably the Pre-Qualification Questionnaire).
Tender Bidding Type
Tender Document
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Frequently Asked Questions About This Tender
Who has issued this tender, and what is it for?
The tender has been issued by MaresConnect Limited (MCL) in Ireland. Such a type of tender falls under Construction work for electricity power lines, within the Education & Training sector, and is listed on Tender Impulse under notice number 681481-2026.
What are the key dates for this tender?
The notice was published on 07 Oct 2026 and submissions close on 31 Oct 2026. Late bids are rarely accepted in public procurement, so aim to have your documents ready several days before the closing date.
Which CPV codes apply to this tender?
It is classified under CPV codes 45231400, which correspond to Construction work for electricity power lines. If your company supplies these products or services, these are the codes to save in your alert profile so no matching tender passes you by.
Can I submit my bid for this tender to Tender Impulse?
No - and this matters. Tender Impulse is a tender aggregation and alert service: we collect procurement notices from official sources around the world and list them in one place. We do not receive, forward or evaluate bids. Your bid for this tender must be submitted directly to MaresConnect Limited (MCL), using the method described in the original tender document, before 31 Oct 2026. Tender Impulse provides complete assistance in submitting all bids posted on its website.
How do I get the bid documents and participation details?
Request a live demo on Tender Impulse and our tender experts will walk you through this listing, share the available documents, and explain how to submit your bid to MaresConnect Limited (MCL). Subscribers also receive help with registration requirements and, where needed, translation of non-English notices - but the submission itself always goes from you to the buyer.
How can I find more tenders like this in Ireland?
There are currently 1803 live tenders of 44105 total tenders from Ireland on Tender Impulse. You can browse them on our Ireland tenders page, or save a search combining Ireland with CPV codes 45231400 - we will then email you every new match on the day it is published.
How to prepare for this bid?
Suppliers must verify technical specifications, the delivery schedules and any other intrinsic details as provided in the complete bid documents before deciding to submit their bids. All necessary certifications and supplier registrations must be undertaken before participation.
Is this tender beneficial for me?
The procurement is applicable to companies in the Construction work for electricity power lines and related industries. If you belong to this industry, you can review the technical documents before assessing your relevance to your company.
What is the procurement trend for The MaresConnect 750MW HVDC Interconnector System?
The public procurement trends for The MaresConnect 750MW HVDC Interconnector System can be assessed by viewing historical data and buying patterns for this product. Subscribed members can view and even download reports of tenders released in the past for their market research. This shall allow them to carefully prepare a compelling bid.
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