Key highlights
- 1The subsea power cable market is expected to reach USD 55 billion by 2036, at a CAGR of 14.0% from 2026 to 2036, driven by offshore wind, interconnectors, and HVDC transmission.
- 2Supply is concentrated and constrained. Prysmian, Nexans and NKT together held about 60% of 2025 global capacity and around 75% of the HVDC market, and cable supply is a bottleneck for offshore wind.
- 3Backlogs are large and long. Transmission order backlogs approached EUR 17-18 billion by late 2025, with Nexans' transmission backlog alone around EUR 8 billion, stretching delivery years out.
- 4HVDC is the technology frontier. ±525 kV extruded HVDC submarine cables are the global ceiling, reached commercially in 2023-2024, enabling up to 2 GW per link.
- 5Offshore wind leads demand. Offshore wind captured roughly 50% of 2025 subsea cable demand, with global offshore wind additions of 10.8 GW in 2025 and around 15 GW a year expected through 2030.
- 6Interconnectors are growing fastest. Cross-border and island interconnectors, such as the ~EUR 2.3 billion Eastern Green Link 4, drive growth on energy-security grounds.
- 7Key companies include Prysmian, Nexans, NKT, Sumitomo Electric, and LS Cable & System.
Report Overview
The subsea power cable market covers high-voltage submarine power cables and their installation, spanning HVAC and HVDC cables for offshore wind export and inter-array connections, interconnectors, and offshore supply, for utilities, grid operators, offshore wind developers and system operators. Onshore cables, subsea telecom cables and umbilicals are outside the scope. Subsea power cables are the high-voltage cables that carry power under the sea. Demand is shaped by offshore wind, interconnectors and energy security, HVDC transmission, and renewables integration. This report examines the size, drivers, cable types, applications, capacity, pricing, regions, competition, recent developments, and outlook of the market, and provides recommendations. Sizing is built bottom-up from HVAC and HVDC cables and installation by current type, application and region, and reflects subsea power cables.
Market dynamics
Drivers
- 01Offshore wind expansion is the primary driver as new offshore wind farms need export cables to shore and inter-array cables between turbines, and global additions of around 10.8 GW in 2025 rising toward 15 GW a year drive large cable demand.
- 02Interconnectors and energy security are a strong and fast-growing driver, as countries connect grids across seas and to islands to trade power and secure supply, with projects such as Eastern Green Link 4.
- 03HVDC transmission is a driver as long-distance and far-offshore links use HVDC, now at ±525 kV, requiring high-value cables.
- 04Renewables integration is a driver as electrification and renewables expansion drive grid and offshore connection.
Opportunities
- 01Capacity expansion is a leading opportunity as cable supply is a bottleneck and manufacturers investing in new plants and vessels capture strong, backlogged demand.
- 02HVDC at 525 kV is an opportunity as the highest-voltage links carry the most power and the highest value, and few players can supply them.
- 03Floating offshore wind dynamic cables are an opportunity as floating wind needs specialised dynamic cables, a growing niche.
- 04New markets are an opportunity as the United States, Asia-Pacific and other regions expand offshore wind and interconnectors.
Trends
- 01The supply shortage and capacity investment are a defining trend as demand exceeds cable and vessel capacity, prompting large plant investments.
- 02HVDC at 525 kV is a trend as extruded HVDC cables reach the voltage ceiling and enable 2 GW links.
- 03Multi-year backlogs and framework agreements are a trend as developers and grid operators secure capacity years ahead through long-term agreements.
- 04Vertical integration is a trend as manufacturers integrate cable production with installation vessels.
Report Summary
| Base Year | 2025 |
|---|---|
| Forecast Period | 2026-2036 |
| Market Size (2025) | USD 13 billion |
| Market Size (2026) | USD 14.9 billion |
| Market Size (2036) | USD 55 billion |
| CAGR (Value) | 14.0% (2026-2036) |
| Format | PDF & Excel |
| Segments Covered | By Current Type: HVAC, HVDC. By Application: Offshore Wind, Interconnectors, Island & Others. By Cable Type; By Region. |
| Geographies Covered | Europe, Asia-Pacific, North America, Latin America, and Middle East & Africa |
| Key Companies | Prysmian, Nexans, NKT, Sumitomo Electric, LS Cable & System, Hellenic Cables, JDR Cable Systems, Hengtong Group, ZTT, Other Companies |
Segmental analysis
By Current Type
- HVAC cables hold the largest share at about 55% of the market in 2026, with HVDC cables accounting for the remainder.
- HVAC submarine cables carrying alternating current, are the largest type by volume because they are used for most offshore wind inter-array and shorter export connections and many island links, where AC is economic over shorter distances.
- HVDC submarine cables carrying direct current, are a large and fast-growing and high-value type used for long-distance interconnectors and far-offshore wind, now reaching ±525 kV and 2 GW, where DC is more efficient over long distances.
The dominance of HVAC reflects its use in the many shorter connections, while HVDC grows in high-value long-distance and far-offshore links.
By Application
- Offshore wind holds the largest share at about 50% of the market in 2026, with interconnectors at about 32% and island and other connections accounting for the remainder.
- Offshore wind using export cables to shore and inter-array cables between turbines, is the largest application because offshore wind is expanding rapidly and is cable-intensive.
- Interconnectors connecting grids across seas and to islands, are a large and fastest-growing application driven by energy security and power trading.
- Island and other connections including island power supply and offshore platforms, are a steady application.
The dominance of offshore wind reflects its scale and cable intensity, while interconnectors grow fastest on energy security.
By Cable Type
- Export and interconnector cables hold the largest share at about 65% of the market in 2026, with inter-array cables accounting for the remainder.
- Export and interconnector cables the high-voltage cables carrying power to shore or between grids, are the largest type because they are longer, higher-voltage and higher-value, and include the HVDC links.
- Inter-array cables the medium-voltage cables connecting turbines within a wind farm, are a significant type growing with offshore wind, supplied by companies such as JDR.
The dominance of export and interconnector cables reflects their length, voltage and value, while inter-array cables grow with offshore wind buildout.
Geographic analysis
Europe Subsea Power Cable Market
Europe is the largest regional market driven by North Sea and Baltic offshore wind, extensive interconnector projects, energy-security policy, and the dominant European manufacturers Prysmian, Nexans and NKT. The region leads in offshore wind, interconnectors and cable manufacturing. Europe's offshore wind, interconnectors and producer base make it the leading market.
Asia-Pacific Subsea Power Cable Market
Asia-Pacific is a large and fast-growing market with major offshore wind and cross-sea interconnection in China, offshore wind in Taiwan, Japan and Korea, and strong manufacturers including LS Cable, Sumitomo, Hengtong and ZTT. The region's offshore wind and interconnection drive rapid growth. Asia-Pacific is a significant and fast-growing market with large offshore wind and interconnection.
North America and Rest of World
North America is a growing market with offshore wind development on the United States east coast and interconnector interest, though subject to project delays and policy uncertainty. The rest of the world adds demand as offshore wind and interconnectors expand. These regions add growth as offshore wind and interconnectors develop beyond the established markets.
Pricing Analysis
Pricing in subsea power cables reflects the cable value, the voltage and technology, installation, and the supply-demand balance, and is currently shaped by a tight market. Subsea power cables are high-value, and with demand exceeding capacity manufacturers hold strong pricing and secure long-term framework agreements and multi-year backlogs, while raw-material costs such as copper and aluminum are passed through, and HVDC and 525 kV cables command a premium. Several factors set cost. The voltage, current type and length drive cost, with HVDC and higher-voltage cables far more valuable. Installation, using specialised vessels, is a large cost and a constraint. The supply-demand balance is central, as the shortage of cable and vessel capacity supports pricing and long lead times. Raw-material costs are passed through. Framework agreements and reservation fees secure capacity ahead of need.
The trajectory of pricing depends on how fast capacity is added against demand, and the current shortage supports strong pricing, while large capacity investments may ease it over time.
Competitive landscape
The market is served by a concentrated group of manufacturers. Prysmian, Nexans and NKT are the leading European manufacturers, together holding about 60% of capacity and around 75% of the HVDC market, with 525 kV HVDC capability and large transmission backlogs. Sumitomo Electric and LS Cable & System are major Asian manufacturers with high-voltage and HVDC capability. Hellenic Cables is a growing European producer. JDR Cable Systems is a leading inter-array and dynamic cable supplier. Hengtong Group and ZTT are large Chinese manufacturers serving domestic and export demand.
Competition turns on capacity and technology, HVDC and voltage capability, installation and project delivery, and long-term relationships, and the market is concentrated among a few manufacturers with the scale and technology to supply high-voltage and HVDC cables. Strong demand and supply constraints favour the incumbents with capacity, HVDC capability and installation assets, and Prysmian, Nexans and NKT dominate the high end while Asian players grow. The field is expanding capacity to meet demand, and capability at 525 kV HVDC, installation assets and secured backlogs shape competition, with new capacity the key variable.
Voice of Customer
Cable supply is one of our biggest constraints, so we secure export and inter-array cable capacity years ahead through framework agreements, and the shortage of cable and installation vessels drives our schedule and cost. HVDC at 525 kV lets us connect far-offshore projects efficiently, and the small number of qualified suppliers means securing capacity early is decisive.
Project director, offshore wind developer (Europe):
Interconnectors are central to energy security and power trading, so we are building HVDC links across seas, and the cable and its installation are the critical path. We work with the few manufacturers that can deliver 525 kV HVDC, and multi-year backlogs mean we plan and contract long in advance.
Grid planner, transmission system operator (Europe):
Our offshore wind and cross-sea interconnection needs large cable volumes, and we draw on both local manufacturers and global suppliers as capacity allows. Cable availability, technology capability and installation are the key considerations, and the tight global market makes securing supply and vessels a priority.
Procurement lead, offshore wind (Asia-Pacific):
Analyst perspective
The subsea power cable market is a rapidly growing and supply-constrained market at the heart of the energy transition, and one where a critical bottleneck rather than demand is the binding constraint. Subsea power cables connect offshore wind to shore, link grids across seas and supply islands, and demand is driven by offshore wind expansion, interconnectors and energy security, and HVDC transmission now at ±525 kV. Offshore wind captured about half of 2025 demand and interconnectors are growing fastest, and the market is concentrated among a few European manufacturers, Prysmian, Nexans and NKT, who together hold most capacity and the HVDC market, with transmission backlogs approaching EUR 17-18 billion stretching years out. The shortage of cable and installation-vessel capacity is a bottleneck for offshore wind, and manufacturers hold strong pricing and secure long-term agreements.
The honest considerations are the capacity bottleneck, capital intensity, and demand risk. The market's defining feature is that supply, not demand, is constrained, so growth depends on how fast manufacturers add cable and vessel capacity, and while large investments are underway, cable plants and vessels are highly capital-intensive and take years to build, so the bottleneck persists in the near term. Installation vessels are a separate and scarce constraint. On the demand side, offshore wind projects face delays and cancellations, notably in the United States, and interconnector projects are large and can slip, so the pipeline carries execution risk even as the long-term direction is strong. The concentration of supply among a few players supports their pricing but exposes projects to limited options. The market should be assessed on the pace of capacity addition, the balance of offshore wind and interconnector demand, and project execution rather than on the energy-transition case alone, and offshore wind, interconnectors and HVDC support rapid growth, with capacity, capital intensity and demand execution the key variables.
Key Strategic Developments
- 2023-2024: Prysmian, Nexans and NKT achieved commercial delivery of ±525 kV extruded HVDC submarine cables, the voltage ceiling, enabling up to 2 GW per link.
- 2025: Transmission order backlogs approached EUR 17-18 billion, with Nexans' transmission backlog around EUR 8 billion, reflecting demand exceeding capacity.
- 2024-2025: Interconnector projects such as the ~EUR 2.3 billion Eastern Green Link 4, a 500 km ±525 kV HVDC link, advanced on energy-security grounds.
- 2024-2026: Manufacturers invested in new cable plants and installation vessels to expand capacity against the supply bottleneck.
- 2025-2026: Chinese and Asian manufacturers expanded offshore wind and cross-sea interconnection cable supply, growing their role in the global market.
Strategic Recommendations
For cable manufacturers
The priority is to expand capacity and installation assets and to advance HVDC capability, because demand exceeds supply and the bottleneck defines the market, and capacity and 525 kV capability capture strong backlogged demand. Companies should invest in new plants and vessels, extend HVDC voltage and floating dynamic cable capability, secure long-term agreements, and manage capital intensity and delivery. Integrating cable production with installation strengthens delivery and the position.
For offshore wind developers and grid operators
The recommendation is to secure cable and vessel capacity early through framework agreements, plan long lead times into project schedules, and qualify multiple suppliers where possible given the concentrated supply. For policymakers, supporting capacity investment and stable offshore wind and interconnector pipelines eases the bottleneck. For investors, this is a rapidly growing, supply-constrained market to evaluate on the pace of capacity addition, the balance of offshore wind and interconnector demand, and project execution rather than on the energy-transition case alone, recognising that demand support is strong while capacity, capital intensity and demand execution are the key variables.
Sustainability impact
Enabling Offshore Wind and Renewables
Subsea power cables connect offshore wind and renewables to the grid, enabling clean-energy generation. These cables support the energy transition.
By carrying power from offshore wind farms to shore and connecting renewables across seas, subsea power cables are essential to deploying offshore wind and integrating clean energy, directly enabling the energy transition.
Grid Interconnection and Energy Security
Subsea interconnectors link grids across seas, improving renewable integration, energy security and efficiency. These cables support resilient clean grids.
By connecting grids across borders and to islands, subsea interconnectors let regions share renewable power, balance supply and demand, and improve energy security, supporting a more resilient and efficient clean-energy system.
Efficient Long-Distance Transmission
HVDC subsea cables transmit large amounts of power over long distances with low losses. These cables support efficient transmission.
By using HVDC at high voltage, subsea cables transmit power over long distances with lower losses than AC, efficiently connecting far-offshore wind and distant grids and reducing the energy lost in transmission.
Capacity as the Constraint
The pace of the offshore energy transition depends on subsea cable and installation capacity. These cables are a critical enabling constraint.
By being a bottleneck for offshore wind and interconnectors, subsea cable and installation capacity shapes the pace of the offshore energy transition, so expanding manufacturing and vessel capacity is central to delivering clean-energy goals.
Table of contents
14 chapters · 235 pages · click to expandFrequently asked questions
The subsea power cable market was valued at USD 13 billion in 2025 and is projected to reach USD 55 billion by 2036, growing from USD 14.9 billion in 2026, at a CAGR of 14.0% from 2026 to 2036, driven by offshore wind, interconnectors, and HVDC transmission.