Flagship backbone cables: how Nexans' 525 kV HVDC solution targets the energy transition

Edited by ad hoc news Flagship & Bestseller Desk. Reviewed before publication on 06/15/2026 at 7:17 PM ET. Details in the imprint.

Nexans is sharpening its focus on high-voltage transmission with its flagship 525 kV HVDC submarine and land cable system, a turnkey solution aimed at Europe's next wave of offshore wind hubs and cross-border interconnectors. The company highlights that a single 525 kV HVDC link can transmit several gigawatts of power over hundreds of miles with reduced electrical losses compared to lower-voltage designs, making it central to planned North Sea and Mediterranean grid projects on its official product catalog.

What Nexans' 525 kV HVDC cable system is designed to do

The 525 kV HVDC system sits at the top end of Nexans' high-voltage portfolio and is built for bulk power transmission, particularly from large offshore wind clusters to coastal load centers and for interconnecting national grids. According to the manufacturer, the system combines extruded insulation technology with copper or aluminum conductors, armor and advanced sheathing options, and is offered as a full package including submarine cables, land cables, factory joints and accessories, as well as installation and testing services as outlined in Nexans' transmission and distribution portfolio materials.

From a technical perspective, operating at 525 kV allows a higher power transfer capacity for a given conductor cross-section than 320 kV or 400 kV HVDC links, which have been common in earlier offshore and interconnector projects. This higher voltage level is particularly relevant for planned multi-gigawatt offshore wind hubs, where developers and grid operators seek to minimize the number of export circuits while still meeting redundancy and reliability requirements. Nexans positions the 525 kV HVDC platform as compatible with modern voltage source converter (VSC) technology, which is increasingly favored for connecting renewable generation and complex AC networks, and emphasizes that the cable design is qualified for long subsea routes and challenging seabed conditions typical of the North Sea and Baltic projects cited in recent European grid planning documents by the International Energy Agency.

Within Nexans' broader strategy, the 525 kV HVDC cable system is described as a cornerstone product for its "electrification value chain" positioning, which spans generation connection, transmission, distribution and building-level wiring. Large turnkey HVDC projects built around this cable technology can represent multi-hundred-million-euro contracts, and Nexans has previously reported significant order intake for offshore wind export systems and interconnectors in its transmission segment. Shares of Nexans (FR0000044448) closed on Euronext Paris at EUR 126.60 on 06/14/2026.

This article was a.i.-assisted and editorially reviewed. Product information without warranty; prices and availability may change at short notice. Not investment advice and not a buy or sell recommendation. Trading involves risk up to and including the total loss of invested capital.