The longest subsea interconnectors across the North Sea and Baltic Sea

The world is wiring up across borders, and the firm orders are the easy part to see. But more than 100 GW of interconnector capacity has not yet reached a final investment decision. For the subsea cable and HVDC supply chain, that is the order book that has not been placed yet.

Aegir Insights now tracks 130+ interconnectors worldwide, helping subsea cable suppliers, interconnector developers, investors, and governments answer three questions:

• Which pre-FID links are real, and which will slip?
• Who owns them, and which converter technology will they choose?
• When does each project actually reach the market?

We track every subsea interconnector by capacity, voltage, technology, route, owner, and investment stage, so you can position before the orders are locked, not after.

Where the longest links run

Across the North Sea and Baltic Sea, the longest links by subsea cable range from operational routes like North Sea Link (720 km) and Viking Link (625 km) to pre-FID projects such as HansaLink (850 km) and TritonLink (773 km). Ranking by subsea cable rather than total length reshuffles the order: Viking Link is mostly onshore, so its 625 km of subsea cable ranks it below the newer, offshore-heavy links.

Want to see the pipeline behind the order book? Reach out for a walk-through.