Renewable energy consultancy OWC was awarded a contract to provide cable engineering support for the Green Volt transmission system, covering both offshore export cables and the onshore cable from the landfall near Aberdeen to the onshore substation, with the Scotland-based team managing the scope and planning completion later in 2025.
During summer 2025, Global Maritime completed management of a combined 3D ultra‑high‑resolution seismic and seabed geophysical survey for the Green Volt floating offshore wind farm site, delivering 100% coverage and confirming that the campaign finished on time, within budget, without significant incidents, and with data quality and coverage meeting the project’s specifications.
On 6 June 2025, TGS announced it had commenced an ultra‑high‑resolution 3D geophysical survey for the Green Volt floating offshore wind farm, with mobilisation having started from Aberdeen and survey operations scheduled throughout June using UHR3D seismic, multibeam echosounder, side scan sonar, sub‑bottom profiler and magnetometer sensors for site characterisation.
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Green Volt is a planned 560 MW commercial-scale floating offshore windfarm located approximately 75–80 km off the northeast coast of Scotland, near Peterhead. Developed by a joint venture between Flotation Energy and Vårgrønn under Crown Estate Scotland’s INTOG (Innovation and Targeted Oil & Gas)...
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Green Volt OnTI, Green Volt floating offshore wind farm, Green Volt Offshore Windfarm Ltd, GreenVolt floating wind farm, Green Volt INTOG project, Green Volt floating offshore windfarm, Green Volt Offshore Windfarm, Green Volt INTOG
Green Volt completed seismic ground surveys earlier in May 2025 at the St Fergus South landfall site north of Peterhead, a key geophysical investigation to map subsurface conditions and optimise the Horizontal Directional Drilling route for installing the offshore export cables in a safe and environmentally responsible way.
Green Volt commenced site investigation works along the consented cable corridor for its export and onshore transmission route, with teams starting geotechnical surveys to gather subsurface data needed to inform the detailed design of the cable route and associated substation and landfall infrastructure over an approximately 17-week campaign.
Site investigation work officially began along the Green Volt cable route, including ground condition assessments and environmental studies across the consented corridor to support the next stages of development and ensure the export and onshore transmission assets are designed and implemented to high technical and environmental standards.
On 16 December 2024, Aker Solutions and ABB were awarded a front-end engineering and design (FEED) contract for the Green Volt floating offshore wind project offshore Scotland. Under this first FEED phase, Aker Solutions will lead design of the high-voltage offshore substation, overall electrical system integration for supplying nearby oil and gas assets and the UK mainland, and associated onshore high-voltage equipment, including jacket substructure design and transport and installation planning, supporting Vårgrønn and Flotation Energy in progressing the project towards construction.
On 3 September 2024, the UK Department for Energy Security and Net Zero announced that the Green Volt floating offshore wind project had secured a Contract for Difference (CfD) in Allocation Round 6, awarding 400 MW of its planned 560 MW capacity at a strike price of £139.93/MWh (2012 prices). This CfD award, described as making Green Volt Europe’s largest floating offshore wind project, provides a long‑term revenue support mechanism underpinning the project’s development and future financing.
Flotation Energy and Vårgrønn confirmed that the 560 MW Green Volt floating offshore wind project is being developed as a joint venture, with ownership split 50% to Flotation Energy and 50% to Vårgrønn. This partnership combines the two offshore wind developers to deliver what is intended to be Europe’s first commercial-scale floating offshore wind farm, supplying power to North Sea oil and gas platforms and the UK grid.
On 19 April 2024, the Scottish Government Marine Directorate granted Section 36 consent and a Marine Licence for the Green Volt Offshore Windfarm east of the Aberdeenshire coast. The consent authorises construction and operation of a floating offshore wind farm of up to 560 MW (35 turbines at up to 16 MW each) along with its associated offshore transmission infrastructure including export cables, offshore substation platform and inter-array cables. Town and Country Planning consent for the onshore transmission assets, including the onshore cable route and substation near New Deer, was also attained in April 2024 from Aberdeenshire Council. Green Volt became the largest commercial-scale floating offshore wind project to secure full planning approval.
In December 2023, BiGGAR Economics submitted a Technical Appendix on the socio-economic impacts of the Green Volt Offshore Wind Farm to the Scottish authorities, providing additional EIA socio-economic analysis requested by the Marine Analytical Unit to support determination of the offshore consent application.
In response to feedback from the Marine Analytical Unit on the original socio-economics chapter of the EIA, Green Volt submitted a Technical Appendix on the project’s socio-economic impacts in December 2023 to support its offshore and onshore planning applications.
On 3 August 2023, the Environmental Impact Assessment (EIA) report for Green Volt’s onshore infrastructure was submitted to Aberdeenshire Council, accompanying the planning application for the buried cable route from the landfall north of Peterhead to the New Deer substation and the new onshore substation.
In March 2023, Crown Estate Scotland awarded Flotation Energy and Vargronn exclusivity to develop up to 1.9 GW of floating offshore wind in Scotland under the Innovation and Targeted Oil and Gas Decarbonisation (INTOG) leasing round, covering the Green Volt and Cenos projects. For Green Volt, the award secured seabed rights for a floating wind farm of up to 560 MW in the North Sea east of the Aberdeenshire coast, approximately 75-80 km offshore on the decommissioned Ettrick/Blackbird oil and gas field area.
By 16 February 2023, public consultation on Green Volt’s offshore section 36 and marine licence applications was underway, with Flotation Energy inviting stakeholders and members of the public to submit views on the proposed floating offshore wind farm to the Scottish Government’s Marine Scotland Licensing Operations Team.
In January 2023, Flotation Energy and Vargronn submitted an offshore consent application for the Green Volt Floating Offshore Windfarm to the Scottish Government Marine Directorate, seeking Section 36 consent and a Marine Licence for a floating wind farm of up to 560 MW east of the Aberdeenshire coast. The application covered the offshore generating station, offshore substation platform, inter-array cables, and export cables to landfall near St Fergus South, north of Peterhead. A separate onshore planning application for the transmission cable route and onshore substation was submitted to Aberdeenshire Council in August 2023.
On 20 January 2023, the Green Volt project submitted its offshore Environmental Impact Assessment (EIA) report to the Scottish Government Marine Directorate (Marine Scotland Licensing Operations Team), as part of the consent application for a >1 MW offshore generating station and associated offshore infrastructure in the UK North Sea.
By 2022, Green Volt had completed its programme of onshore and offshore environmental and baseline surveys, providing the data on shipping, ecology, seabed conditions, terrestrial environment and land use needed to support the project’s Environmental Impact Assessments and design development.
A separate onshore EIA scoping report for Green Volt’s onshore infrastructure, including the landfall, cable route and substation, was submitted to Aberdeenshire Council in March 2022 to identify key environmental issues and guide the onshore EIA work.
From the end of 2021, Green Volt appointed a Fisheries Liaison Officer who has been engaging with inshore and offshore fishing organisations, issuing Notices to Mariners and discussing potential compensation where appropriate, as part of early stakeholder engagement to manage interactions between project surveys/works and commercial fisheries.
An offshore Environmental Impact Assessment (EIA) scoping report for the Green Volt floating offshore wind farm was submitted to Marine Scotland in November 2021 to obtain the authority’s opinion on key environmental issues and inform the subsequent offshore EIA process.
Between 2020 and 2022, Green Volt commenced extensive onshore and offshore environmental and baseline surveys, covering shipping activity, seabed habitats and ecology, offshore ornithology, terrestrial ecology, ground conditions, land use and other environmental aspects to inform project design and the Environmental Impact Assessments.
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