MarramWind is a proposed floating windfarm located in the North Sea, with the potential to deliver up to 3 gigawatts (GW) of clean, renewable energy. 

Covering an area of 684km2, the windfarm will consist of up to 225 floating wind turbines, in water depths averaging 111 metres, located approximately 75km off the north-east coast of Aberdeenshire. 

The renewable electricity generated by the windfarm will play a pivotal role in achieving Scottish and UK net zero targets for 2045 and 2050 respectively, while also supporting energy security and promoting energy innovation. 

The electricity produced by the wind farm will connect to the national grid at Scottish and Southern Electricity Network’s (SSEN) Netherton Hub substation which is under construction to the west of Peterhead.  

Onshore infrastructure 

MarramWind’s onshore infrastructure will include a new onshore substation site located near the grid connection point at the SSEN Netherton Hub. The site will contain three substations, which will be built in phases as the wind farm is developed. They will receive electricity from the offshore wind farm, convert it to the voltage required for the national grid, and ensure it meets UK electricity network standards before it is transmitted across the country via the Netherton Hub. 

Underground export cables will connect the offshore wind farm to the onshore substation site and onward to the Netherton Hub. The cables will be installed within a dedicated cable corridor and buried underground to minimise long-term visual impacts. Construction will require temporary working areas, access tracks and compounds along the route, with land reinstated once works are complete. Where the cable route crosses major roads, rivers or existing utilities, specialist construction techniques will be used to reduce disruption and protect the surrounding environment. 

Project Timelines 

MarramWind is anticipated to begin construction in the early 2030s, subject to securing all necessary onshore and offshore planning consents and licences, and a signed Gate 2 grid Connection Offer with the National Energy System Operator (NESO). The indicative timetable for the project is shown below.