Why National Grid’s Viking Link quietly matters for everyday energy use
Published on 06/17/2026 at 21:01 | Editorial responsibility: Rafael MĂĽller, Editor-in-Chief AD HOC NEWS
Reviewed: ad hoc news Accessory & Components desk. Edited and checked on 2026-06-17, 20:59. Details in the imprint.
With the Viking Link interconnector, National Grid sends a 765-kilometre high-voltage lifeline under the North Sea that you never see, but you may feel on your power bill and in fewer blackout headlines on stormy winter evenings.
Background on the National Grid plc share
Viking Link is part of National Grid’s multi-decade infrastructure build-out that aims to harden the UK network and plug it deeper into European power markets.
What Viking Link actually is
Viking Link is a high-voltage direct current interconnector between Bicker Fen in Lincolnshire and Revsing in southern Denmark, running roughly 765 kilometres, mostly on the seabed of the North Sea. Official project page from National Grid
The cable is designed for a maximum transmission capacity of 1.4 gigawatts, enough to supply power to well over a million homes when fully loaded, depending on usage patterns.
How it changes everyday power flows
On a windy night when turbines in Jutland are spinning hard, Viking Link allows surplus Danish electricity, much of it wind-generated, to flow quietly into the UK grid and reduce reliance on gas-fired plants.
On calm days in Denmark, the power direction can reverse, sending British-generated electricity back across the North Sea instead, depending on relative prices and system needs.
Technical backbone under the sea
The system uses ±525 kV HVDC technology, with converter stations at each end transforming alternating current from the national grids into direct current and back again for efficient long-distance transport. Siemens Energy project description
The subsea and underground cables are armoured and buried where necessary to protect against anchors, fishing gear, and the slow grind of the seabed, making the physical presence almost invisible once installed.
Climate goals and system stability
Viking Link is part of National Grid’s broader interconnector strategy, which also includes projects such as BritNed, Nemo Link and North Sea Link, all aimed at smoothing out renewable peaks and troughs across borders. Reuters overview of National Grid’s network strategy
Interconnection makes it easier to keep frequency and voltage within tight limits when more wind and solar enter the system, because operators can lean on several markets instead of just one national network.
Costs, timeline and who pays
The project cost is estimated in the low-single-digit billion-pound range, financed jointly by National Grid and its Danish partner Energinet, with recovery through regulated network charges over decades.
For end customers, this shows up in the background of their delivery tariffs rather than as a separate line item, balancing up-front investment with potential savings from accessing cheaper power and avoiding expensive backup generation.
Everyday impact for consumers
Most UK households will never know exactly when their kettle is effectively running on Danish wind, but they should benefit from a more resilient grid and, over time, from more competition in wholesale power prices.
For investors and regulators, the cable is another test of whether large regulated infrastructure can deliver both decarbonisation progress and acceptable bill impacts in a politically sensitive environment.
Where the project fits for National Grid
Viking Link slots into National Grid plc’s long pipeline of regulated capital expenditure, which stretches from new substations to further offshore links that connect North Sea wind farms into the UK network.
Shares of National Grid plc (GB00BDR05C01) trade in London under the ticker NG., giving investors exposure to this kind of cross-border electricity infrastructure alongside its UK and US transmission businesses.
Key facts on Viking Link
- Product: Viking Link interconnector
- Manufacturer: National Grid plc
- Category: Accessory/Spare part - grid infrastructure
- Launch: Construction phase mid-2020s, commercial operation targeted in the second half of the decade
- RRP / Price: Project cost in the low-single-digit billion-pound range (regulated asset, not retail-priced)
- Availability: Part of the UK-Denmark high-voltage network, not a consumer product
- Target group: Transmission system operators, power traders, indirectly all electricity consumers in the UK and Denmark
- Highlight / USP: Up to 1.4 GW cross-border capacity to move large volumes of low-carbon electricity between the UK and Denmark
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