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The methodology will enable more accurate and standardised assessments of carbon footprints across the full lifecycle of offshore wind developments. It is applicable to fixed-bottom and floating offshore wind turbines, whether prospective, operational, or at any other stage of their lifecycle. It also has the potential to support carbon emission transparency on offshore wind projects, facilitating action on non-price criteria following recent changes to many international offshore wind auction requirements.

The Carbon Trust collaborated with twelve SUS JIP industry partners — representing around a quarter of installed wind farm capacity globally — to devise the methodology. These include bp, EnBW, Equinor, Fred Olsen Seawind, Parkwind, Orsted, RWE, ScottishPower Renewables, Shell, SSE Renewables, Total Energies, and Vattenfall. The methodology also received input from several international research bodies, public bodies, industry, and wind trade associations as part of a consultation process.

The methodology is available to any offshore wind industry stakeholder, such as supply chain companies, consultants and developers involved in measuring the carbon impact of an offshore wind project, including the electricity generated and delivered to the grid. It provides a breakdown of how the carbon footprint can be calculated for all activities related to the material extraction, manufacturing, construction, installation, operation, decommissioning and end-of-life of the core infrastructure.

The SUS JIP partners will use this methodology to support the standardisation of carbon emissions reporting. All twelve developers strongly encourage their networks and supply chains to refer to this publicly available methodology and are keen to have continuous partner engagement on this topic.

“Having transparent data on the carbon footprint of offshore wind farms is a game-changer. It allows developers to better understand and reduce the carbon emissions of their projects, while giving investors the ability to make informed, side-by-side comparisons between developments," says Mary Harvey, Programme Manager for SUS JIP from the Carbon Trust.