We’re strengthening sections of our High Voltage infrastructure in the north of Mainland Shetland. This is an essential upgrade which will increase network capacity for future economic development across the islands. It will also support the uptake of low-carbon technologies like heat pumps and EV chargers in peoples’ homes. And it will also further improve the reliability and security of the power supply for Shetland’s communities.
What does the network upgrade involve?
At the heart of this major project is the installation of two new High Voltage underground distribution cables between Gremista Grid Supply Point and the north Mainland of Shetland. The installation route, which is 43km long, will see the cable installed in the public highways. We expect this to be completed by the end of 2026.
We’ve appointed OCU Group as our contract partner, and they’ve been working alongside our own teams to deliver this major project since works first got underway in Summer 2025.
Full details of the cable route can be found in the two maps on the left of this page. We’ll also be publicising dates for each phase of the works here as they’re confirmed, as well as on our social media channels.
In addition to these underground cables, we’ll also construct a new switching station at Quoys of Garth, carrying out upgrades to our substations at Firth and Mid Yell, and making minor reconfigurations to existing overhead lines over the course of the project.
What are the key environmental considerations?
We’re committed to protecting the local environment in everything we do. We always follow strict environmental guidelines on every project we undertake to reduce the impact on the surrounding landscape and wildlife. This rigorous approach includes surveys both prior to construction, as well as during the construction phase.
Prior to construction starting, our teams have been talking to a number of environmental stakeholders, including NatureScot and Shetland Islands Council.
As a result of our ongoing environmental and efficiency reviews on this project, we’re now going to be installing the two new underground cables solely in the public highway. This is a move away from earlier proposals that would have seen portions of the route in offroad locations. For more details on this change, click here.
What are the economic benefits of the North Shetland Reinforcement Project?
This upgrade will ensure our network is an enabler – and not a blocker – of the take-up of new low carbon technologies and efforts to decarbonise industry. Through this, we’re supporting Shetland’s local economy and enabling further job creation. Furthermore, during the project’s construction phase, we’re committed to working with local contractors and suppliers as much as possible.
What is the anticipated impact on the community?
Both ourselves and OCU Group will continue to work closely with local communities to minimise any disruption during construction, and ensure the project delivers lasting benefits for local communities, the local economy and energy security. We’ll also keep in touch with local residents and stakeholders to address any potential areas of concern, and we’ll maintain transparency throughout the project’s development.
Will Shetland be connected to the UK mainland?
This project will enable our Distribution network to link to the Shetland High Voltage Direct Current (HVDC) connection. This will be the first-ever connection between Shetland and the UK Mainland electricity grid. Together, these developments will secure Shetland’s electricity future, further improve network reliability and support wider efforts to decarbonise communities and the economy.
Timeline
The project is currently underway, with teams progressing cable installation at various points along the planned route. Details of the specific areas our teams are working in will be shared with the community as and when they become available.