East Anglia ONE from Iberdrola S.A. - 714 MW offshore wind in daily operation

Reviewed: ad hoc news B2B & Pro desk. Edited and checked on 2026-06-27, 09:53. Details in the imprint.

East Anglia ONE feels like a small industrial city at sea, with 102 turbines standing in regimented rows on the cold North Sea horizon. Maintenance crews hear only a quiet mechanical hum and the rush of waves as the 714 MW project pushes power back to the UK mainland.

What East Anglia ONE delivers

East Anglia ONE from Iberdrola S.A. is a UK offshore wind farm with an installed capacity of 714 MW, built in partnership with ScottishPower Renewables. It consists of 102 Siemens Gamesa turbines, each rated at 7 MW, arranged roughly 43 km off the Suffolk coast.

According to Iberdrola, East Anglia ONE can supply clean electricity to around 630,000 UK homes per year, displacing significant fossil generation and contributing to the country’s decarbonisation targets. The project connects ashore at Bramford via high-voltage export cables and an onshore substation near Ipswich.

How the project is built

The foundations under each turbine are steel jackets pinned into the seabed, designed to handle rough North Sea conditions while keeping tower movement within tight tolerances. When technicians like site manager Mark Whitworth step onto the landing platform, they feel the structure gently flex under their boots but remain solid.

Each turbine tower rises around 90 meters above sea level, with three blades about 75 meters long sweeping a huge area of air. The blades rotate at a controlled speed, and even on a grey, windy day the motion looks smooth rather than frantic, which simplifies maintenance and reduces mechanical stress.

Operating on the North Sea

Day to day, East Anglia ONE is run from a dedicated operations base in Lowestoft, with crews heading out by crew transfer vessels and, in some cases, helicopters. The trip can mean 40 to 90 minutes of hard, salt-spray travel before reaching the lattice of towers.

On arrival, technicians climb the ladder from the boat landing and enter the tower through a compact doorway, where they find a tidy, self-assured interior: cable runs tagged, switchgear labeled, safety kits in predictable places. The space smells faintly of lubricants and metal, not of dust or diesel.

Grid and market role

The farm feeds into the UK transmission network on a 220 kV connection, participating in long-term contracts under the UK’s Contracts for Difference scheme. That structure gives Iberdrola stable revenue per MWh within the contract window, which CFO José Sáinz Armada has highlighted in investor presentations.

Beyond the core CfD revenue, the asset can benefit when wholesale prices are strong, provided volumes are available and curtailment is limited. This makes reliable turbine availability and smart maintenance scheduling commercially critical, not just a technical exercise.

Environmental and local impact

Before construction, Iberdrola ran extensive environmental assessments, including bird migration studies and marine mammal surveys. Those studies drove layout adjustments and operational constraints such as seasonal piling windows to reduce underwater noise exposure.

Locally, port activity in Great Yarmouth and Lowestoft has picked up due to foundation staging, cable logistics and long-term O&M work. When project director Charlie Jordan talks about East Anglia ONE, he often points to these regional supply-chain jobs as a concrete outcome alongside carbon savings.

What annoys operators

Running a North Sea wind farm of this scale is not frictionless. Weather windows can close quickly, leaving technicians stranded onshore and pushing back planned repairs. That, in turn, challenges availability targets and forces more conservative planning buffers.

Some components, such as subsea cable accessories, remain complex to replace and require specialist vessels booked months ahead. When those vessels slip their schedule, O&M teams watch the outage counter tick up and have to explain the variance to Bilbao-based management.

Future upgrades and lessons

East Anglia ONE is also a learning field for Iberdrola’s next UK projects, including the broader East Anglia hub. Experience with corrosion control, jacket inspection and blade-leading-edge wear feeds directly into design tweaks and contract structures for subsequent phases.

Engineers have gained a cleaner view of how 7 MW-class turbines behave over several winters of real offshore operation. Blade erosion in harsh weather, for instance, has prompted more robust coating selections and more frequent visual checks by rope-access teams.

Layer C - Iberdrola and the share price

For Iberdrola, East Anglia ONE sits alongside major Spanish onshore and hydro assets and is a visible piece of its global renewables narrative. Iberdrola shares (ISIN ES0144580Y14) trade in Madrid under the symbol IBE, with the Iberian listing remaining the primary reference for long-term shareholders.

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