Underground DC Electric Cable Market - Global Industry Size, Share, Trends, Opportunity, and Forecast, 2021-2031F

Medium Voltage is the fastest growing sector, Asia-Pacific is the largest market

The Global Underground DC Electric Cable Market is projected to expand from USD 29.13 Billion in 2025 to USD 45.74 Billion by 2031, registering a CAGR of 7.81%. These cables are specialized insulated mediums designed to transmit high-voltage direct current underground, providing superior efficiency for long-distance power transfer compared to alternating current systems. A primary catalyst for this growth is the global necessity to connect remote renewable energy sites to national grids, coupled with increasing demands for cross-border interconnections to strengthen energy security. As noted by the Global Wind Energy Council, 8 GW of new offshore wind capacity was connected to the grid globally in 2024, creating substantial demand for robust underground and submarine DC cabling to transport clean energy to onshore consumption points.

However, a significant obstacle impeding market progress is the substantial capital investment required, particularly regarding the high costs of specialized cable production and AC-DC converter station construction. Although underground cables provide distinct aesthetic and operational advantages, their considerably higher expense compared to traditional overhead lines often complicates financial feasibility assessments. This cost disparity frequently delays the final investment decisions needed to launch large-scale utility projects.

Market Drivers

The rapid expansion of offshore wind energy installations acts as a major driver for the underground DC electric cable sector. As nations aim to decarbonize, the development of massive wind farms far offshore requires high-voltage direct current (HVDC) subsea and underground land cables to efficiently transport electricity to inland load centers with minimal power loss. This shift toward remote renewable generation is driving massive capital deployment for grid upgrades and cable procurement. For example, TenneT reported in July 2024 that its total grid investments reached €4.6 billion in the first half of the year, a surge largely attributed to the acceleration of its 2 GW offshore program.

Concurrently, the rising demand for inter-regional and cross-border grid interconnections is amplifying the need for insulated cable systems capable of spanning vast distances and stabilizing diverse power networks. Underground DC cables are increasingly favored for these strategic links to bypass the permitting hurdles and visual impacts associated with overhead lines in populated or sensitive areas. A key example of this trend is the development of major energy highways; NeuConnect Interconnector announced in November 2024 that the first phase of cabling was finalized for the £2.4 billion link connecting the UK and German grids. This robust project pipeline is driving significant demand for manufacturers, as evidenced by NKT A/S, which announced in February 2025 a high-voltage order backlog of €10.6 billion at the end of 2024.

Market Challenges

The substantial capital outlay required for specialized cable manufacturing and the construction of AC-DC converter stations constitutes a severe barrier to the Global Underground DC Electric Cable Market. These elevated upfront costs negatively affect the financial viability of long-distance transmission projects, especially when compared to more economical overhead alternatives. Utility operators and developers often struggle to reconcile these superior expenditures with regulatory budget caps and required rates of return, leading to hesitant investment strategies. Consequently, the financial burden of undergrounding frequently results in significant delays or the cancellation of planned infrastructure upgrades, as the economic justification for such premium assets becomes difficult to establish.

This cost-driven constraint restricts market growth by limiting the technology's application to unavoidable bottleneck areas rather than broader grid deployment. According to the Institution of Engineering and Technology, in 2025, the deployment of underground transmission cabling was reported to be on average 4.5 times more expensive than traditional overhead lines. This magnitude of cost disparity compels grid planners to opt for overhead solutions wherever possible, directly reducing the volume of underground DC cable procurement and hampering the sector’s potential for rapid expansion.

Market Trends

The adoption of ±525 kV voltage standards for long-distance underground transmission represents a critical technological evolution, enabling grid operators to maximize power transfer capacity within limited rights-of-way. By elevating the operating voltage from the traditional 320 kV, utilities can effectively double the transmission capability per cable pair, which is essential for realizing high-capacity energy corridors without significantly expanding the physical footprint of the infrastructure. This shift toward ultra-high-voltage systems is being substantiated by substantial commercial commitments. According to Prysmian S.p.A., in its 'Q3 & 9M25 Integrated Results' from October 2025, the company reported securing new orders, including the strategic EGL4 project, with an approximate total value of €3 billion, validating the rapid market scaling and developer confidence in these advanced 525 kV cable systems.

Simultaneously, the market is experiencing a decisive shift towards Voltage Source Converter (VSC) optimized cable designs, primarily utilizing extruded cross-linked polyethylene (XLPE) insulation over legacy mass impregnated technologies. This transition is driven by the superior operational flexibility of extruded XLPE, which supports higher conductor temperatures and enables lighter, more resilient cable architectures necessary for complex grid integration and multi-terminal compatibility. The accelerating demand for these specialized components is reflected in the robust financial performance of key manufacturers. According to Nexans' 'Q3 2025 Financial Information' from October 2025, the Transmission segment recorded a significant organic sales increase of 25% year-on-year, underscoring the aggressive industry migration toward these next-generation VSC-compatible cable solutions.

Key Market Players

• ABB Ltd.
• Prysmian Group S.p.A.
• NKT A/S
• Nexans S.A.
• Siemens AG
• Hitachi, Ltd.
• LS Cable & System Ltd.
• Southwire Company
• Sumitomo Electric Industries, Ltd.
• Mitsubishi Electric Corporation

Report Scope

In this report, the Global Underground DC Electric Cable Market has been segmented into the following categories, in addition to the industry trends which have also been detailed below:

Underground DC Electric Cable Market, by Cable Construction:

• Single-Core Cables
• Multi-Core Cables
• Self-Contained Fluid-Filled (SCFF) Cables
• Mass Impregnated (MI) Cables
• Extruded Cables

Underground DC Electric Cable Market, by Installation Method:

• Direct Buried
• Trenching
• Ducting

Underground DC Electric Cable Market, by End-User Industry:

• Utilities
• Renewables
• Industrials
• Commercial
• Transportation

Underground DC Electric Cable Market, by Voltage Rating:

• High Voltage
• Medium Voltage
• Low Voltage

Underground DC Electric Cable Market, by Region:

• North America
• Europe
• Asia Pacific
• South America
• Middle East & Africa

Competitive Landscape

Company Profiles: Detailed analysis of the major companies present in the Global Underground DC Electric Cable Market.

Available Customizations:

With the given market data, the publisher offers customizations according to a company's specific needs. The following customization options are available for the report:

Company Information

• Detailed analysis and profiling of additional market players (up to five).

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