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November 23, 2021

Walney Extension, UK

By Carmen

Walney Extension is a 659MW offshore wind power project. The project is located in Irish Sea, England, the UK. The project is currently active. It has been developed in multiple phases. The project construction commenced in 2017 and subsequently entered into commercial operation in September 2018.

Project Type Total Capacity (MW) Active Capacity (MW) Pipeline Capacity (MW) Project Status Project Location Project Developer
Offshore 659 659 Active England, the UK Orsted


The project was developed by Orsted. Orsted, Pensionskassernes Administration and PFA Pension Forsikringsaktieselskab are currently owning the project having ownership stake of 50%, 25% and 25% respectively.

The wind turbines in the project are installed on fixed foundations. An array of monopile foundations feature in the project.

The project supplies enough clean energy to power 600,000 households.

The turbines installed on the Walney Extension (Walney Extension Phase I), are using Tubular Steel towers.

The turbines installed on the Walney Extension (Walney Extension Phase II), are using Tubular Steel towers.

Development Status

The project is currently active. The project construction commenced in 2017 and subsequently entered into commercial operation in September 2018.

Contractors Involved

Orsted was selected to render EPC services for the wind power project.

Walney Extension (Walney Extension Phase I) is equipped with Vestas Offshore Wind V164-8.25 MW turbines. The phase consists of 40 turbines with 8.25MW nameplate capacity.

Walney Extension (Walney Extension Phase II) is equipped with Siemens Gamesa Renewable Energy SWT-7.0-154 turbines. The phase consists of 47 turbines with 7MW nameplate capacity.

Orsted and Vestas Offshore Wind have provided O&M services for the project.

About Orsted

Orsted AS (Orsted) is a renewable energy company. It develops, constructs, and operates offshore and onshore wind farms, bioenergy plants, solar farms, and energy storage facilities, and provides waste-to-energy solutions and smart energy products. The company produces heat and electricity using coal, natural gas, oil, biomass, wind and solar sources; and sells power and gas in wholesale and retail markets, and optimizes and hedges its energy portfolio. Orsted also owns and operates gas and power contracts, and originates and trades these for optimizing its portfolio; and operates Renescience plants, biogas upgrade facilities and biogas plants. It has operations in the UK, Denmark, Germany, the US, the Netherlands and other. Orsted is headquartered in Fredericia, Denmark.


All power projects included in this report are drawn from GlobalData’s Power Intelligence Center. The information regarding the project parameters is sourced through secondary information sources such as electric utilities, equipment manufacturers, developers, project proponent’s – news, deals and financial reporting, regulatory body, associations, government planning reports and publications. Wherever needed the information is further validated through primary from various stakeholders across the power value chain and professionals from leading players within the power sector.

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