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 six longest links by subsea cable span the full pipeline, from operational routes to projects still in planning. TritonLink (1,000 km) and HansaLink (850 km) lead the ranking — both still pre-FID — ahead of the proposed Baltic WindConnector (750 km). They are followed by the operational North Sea Link (720 km), the under-construction NeuConnect (706 km), and the operational Viking Link (625 km). Ranking by subsea cable rather than total length reshuffles the order: Viking Link runs 142 km onshore, so counting subsea cable alone drops it from third by total length to last of the six.

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