The Isle of Man is marking 25 years since the commissioning of its subsea electricity interconnector, a piece of infrastructure credited with transforming energy security.
Installed in 2000 by the Manx Cable Company, a subsidiary of Manx Utilities, in partnership with National Grid, the 104km cable connects the island to North West England.
Before its installation, the Isle of Man experienced regular power cuts, but blackouts have since become rare following the interconnector’s introduction and wider improvements to the power network.
World-First
At the time, the project was a world-first, becoming the longest AC subsea cable ever installed. Despite its scale, construction was completed in just two years.
The cable, which weighs around 5,000 tonnes, runs from Port Skillion to Bispham and was buried beneath the seabed using specialist equipment.
A fibre optic cable was laid alongside it to provide command, control and telecoms capacity.
Over the past 25 years, the interconnector has enabled Manx Utilities to both import and export electricity, generating around £230 million in revenue.
After operational costs, around £80 million has been reinvested into maintaining and improving services, with an estimated 2 to 3 billion units of electricity exported during its lifetime.
Interconnector Importance
The cable has been out of service for just 26 days in 25 years and partially runs through a marine nature reserve. With continued maintenance, it is expected to remain operational for at least another 30 years.
Chair of Manx Utilities John Wannenburgh MHK said: “Twenty-five years of continuous operation is a remarkable achievement.
“The subsea interconnector has been a cornerstone of our energy security, ensuring the Isle of Man remains connected and resilient. This milestone is a testament to the vision and expertise that delivered such a vital asset for our island.”
