East Anglia ONE starts to generate clean electricity

Iberdrola has connected the East Anglia ONE offshore wind farm to the British electricity grid. With an installed capacity of 714 MW, it will be the largest offshore wind farm in the world, after coming into operation in 2020.

North Sea (United Kingdom)

Wind turbines number
102 WTG E19 Siemens Gamesa turbines

Total area
300 km2

Total installed capacity
714 MW

£2.5 billion

Start date

East Anglia ONE

The first of East Anglia ONE's 102 wind turbines is already supplying electricity to the farm's land substation located in the town of Burstall. Iberdrola group — through it subsidiary ScottishPower Renewables in the United Kingdom — has installed 25 turbines throughout the summer and will gradually connect them to the grid.

East Anglia ONE will be the world's biggest offshore wind farm when it starts running in 2020, with an installed capacity of 714 MW supplying clean energy to nearly 630,000 British households. Located in the North Sea — about 50 kilometres from the coast of the English county of Suffolk — it has an investment of 2.5 billion pounds and is owned 60% by the Iberdrola group and 40% by the Green Investment Group (GIG), of the Macquarie group.

The construction of East Anglia ONE is boosting the offshore wind industry in Europe, employing more than 1,300 people in several countries (Spain, the United Kingdom, the Netherlands, the United Arab Emirates) and is key for various industries, such as the naval.


  • The farm will stand 50 km off the coast and will cover an area of 300 km2, which is equal to 40,000 football pitches.
  • East Anglia ONE will feature 102 wind turbines each producing 7 MW supplied by Siemens Gamesa. Once installed, they will reach a height of 167 metres (two metres higher than the Iberdrola Tower in Bilbao, Spain), with 75 metre long blades.
  • The jacket type foundations were manufactured by Navantia in Fene (Galicia, Spain) and by Lamprell in the United Arab Emirates and by Harland & Wolff in Belfast (Ireland). Windar built the piles in Avilés (Asturias, Spain).
  • The Andalucía II marine substation, manufactured by Navantia in Puerto Real (Cádiz, Spain), will be in charge of collecting the electricity produced by the wind turbines and transforming the voltage to transport it to the coast. To do so, two submarine cables will be laid, each 85 kilometres long.
  • These cables are connected to a further six underground cables approximately 37 km long, from Bawdsey to a new onshore transformer at Burstall, which connects the offshore wind farm to the national grid.

 'The East Angle' magazine. Summer 2019 issue: "East Anglia Offshore Windfarm Projects"

 East Anglia ONE: turbines [PDF]

 East Anglia ONE: jacket foundations [PDF]

 East Anglia ONE: offshore substation [PDF]

 East Anglia ONE: jackets [PDF]

 East Anglia ONE: offshore wind turbine [PDF]


But this new offshore farm is part of an even more ambitious project: Iberdrola, through its subsidiary ScottishPower Renewables, has asked the British Government for permission to extend these facilities and has submitted a proposal to the United Kingdom Authorities to build two farms: East Anglia TWO (257 km2 / 800 MW capacity) and THREE (305 km2 / 1,200 MW capacity).

The company has received approval from the Department for Business, Energy & Industrial Strategy in the United Kingdom (BEIS) to start up East Anglia THREE, which will be located 69 kilometres off the coast of Norfolk — near the metropolitan area of London — and will supply electricity to approximately one million homes. The aim is to start on the construction work in 2022, and start production in 2025.

With this, the future East Anglian complex will reach a total power capacity of 2,000 MW, thereby becoming one of the largest renewable energy installations in the world.

 East Anglia THREE: main data [PDF]

Likewise, and in response to the company's on-going commitment to wind power research and innovation, ScottishPower is developing the Frond Mats initiative (vegetation covers) in the waters of the East Anglia ONE offshore wind farm, which uses synthetic undersea vegetation to reduce the effects of currents and is designed to protect wind turbines from the effects of erosion, resulting in huge economic savings.