The Hornsea 3 offshore wind farm from Ørsted Energie - 2.9 GW aiming for record-scale clean power

Reviewed: ad hoc news Classics & Longseller desk. Edited and checked on 2026-06-28, 14:39. Details in the imprint.

The Hornsea 3 offshore wind farm from Ørsted Energie begins far out in the North Sea, where rows of foundations rise from grey-green water and construction ships look like toys under a low sky, while onshore residents hear the distant rumble of heavy transformers crawling through Norfolk villages.

What Hornsea 3 sets out to do

Hornsea 3 is planned as an approximately 2.9 gigawatt offshore wind farm, a capacity that would make it one of the largest single renewable power projects in the world once fully commissioned. That figure translates into enough electricity for several million UK households under typical consumption assumptions.

The project sits roughly 120 km off the Yorkshire and Norfolk coasts and forms the third stage of Ørsted's Hornsea zone, following Hornsea 1 and Hornsea 2 in the same area. Together, these sites are intended to act as a giant clean-power corridor feeding into the British grid.

How the project feels on the ground

While turbines are still being installed offshore, Hornsea 3 is already tangible inland, with convoys of large transformers moving slowly along Norfolk roads toward a new converter station near Swardeston just south of Norwich. Locals see police escorts, low loaders and temporary traffic lights reshaping daily commutes as components make their way to the 49-acre substation site.

At that converter station, high-voltage direct current equipment will eventually take power from offshore cables, turn it into grid-ready alternating current and push it into the National Grid network. Project director Jason Ashworth has described two connection "links" that will go live in stages, one expected by the end of this year and the second early next year.

The engineering and timeline

Out at sea, installation of 197 monopiles has started, each forming the steel foundation for a single turbine tower planted into the seabed. These foundations must be driven deep enough to withstand waves, currents and North Sea storms over the planned multi-decade operating life of the farm.

The overall Hornsea 3 investment has been reported at around £8.5 billion, reflecting both complex offshore construction and the high-voltage grid connection onshore. The UK government granted the development consent order in late 2021, with the project then advancing through detailed engineering and procurement phases.

Balancing power and local impact

To moderate noise and visual impact from the substation, Ørsted has integrated landscaping and a battery energy storage system that can absorb excess electricity and release it later to smooth grid flows. Residents around Swardeston still live next to tall converter halls and transmission lines, but mitigations aim to keep the footprint more tidy than an unplanned industrial sprawl.

In interviews with local media, Ashworth has emphasized that only two large transformers now remain to be delivered, with the final one due by mid-July, after which heavy-vehicle traffic should subside significantly. For communities that have watched months of component convoys, that promised quiet phase will be welcome.

Who Ørsted is betting on

Ørsted Energie, led by chief executive Mads Nipper, has repositioned itself over the past decade from a fossil-fuel-heavy Danish utility into a specialist in offshore wind, with Hornsea 3 as one of its biggest bets on that strategy. The Hornsea cluster is central to Ørsted's ambition to supply large-scale green power to industrial and residential customers in the UK.

For UK grid planners, the project is part of a broader effort to replace ageing thermal capacity with renewables while keeping system stability through storage, interconnectors and flexible demand schemes. Hornsea 3's output will feed into those balancing tools rather than sit alone as an uncontrollable source.

Where Hornsea 3 sits in the portfolio

Within Ørsted's offshore portfolio, Hornsea 3 joins earlier UK projects like Hornsea 1 and 2, as well as sites in Germany, the Netherlands and Taiwan. Each farm has its own turbine mix and contract structure, but Hornsea 3 stands out for its headline capacity and long project timeline.

The farm is expected to reach full completion around 2027, with Ashworth indicating that commissioning work and site management could continue into early 2028. That multi-year horizon means Ørsted must manage construction risk, grid-connection milestones and evolving UK energy policy simultaneously.

Layer C - company and shares

Ørsted Energie positions Hornsea 3 as a flagship asset for its UK offshore portfolio, reinforcing its transition narrative from fossil fuels to renewables and supporting long-term contracted cash flows in pounds and Danish kroner. Ørsted Energie shares (ISIN DK0061539921) trade primarily on Nasdaq Copenhagen, where investors track the pace of offshore build-out more closely than short-term earnings swings.

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