SPIE Wind Connect Wins Cable Termination Contract for 1,440 MW Polish Baltic Offshore Wind Projects

SPIE Global Services Energy, through its SPIE Wind Connect unit, has secured a contract from Seaway7 to provide high-voltage cable termination and testing services for the Baltyk II and Baltyk III offshore wind farms in Poland. The two projects, located in the Polish Exclusive Economic Zone in the Baltic Sea, are each expected to deliver around 720 MW of installed capacity for a combined 1,440 MW, with the main offshore campaign scheduled to begin in the second quarter of 2026.

 

Strategic Significance for Poland's Offshore Wind Pipeline

 

Baltyk II and Baltyk III are central components of Poland's accelerating offshore wind development pipeline, which has emerged as one of the most active in Europe. The combined 1,440 MW capacity adds materially to Poland's national target of reaching 13.1 GW of installed offshore wind capacity by 2030, a goal that requires the country to deliver multiple large-scale projects in parallel through the second half of the decade. The success of cable termination and testing campaigns is particularly important because the inter-array cable system is the backbone of any wind farm's electrical architecture, connecting individual turbines to the offshore substation and ultimately to the export cable that delivers power to shore. Schedule slippage at this stage of construction can have cascading effects on commissioning timelines and revenue start dates.

 

Scope of the SPIE Wind Connect Contract

 

The contract covers termination and testing of the 66-kV inter-array cable network connecting wind turbine generators to offshore substations across both projects. Each wind farm will consist of ten strings of five wind turbines connected to offshore substations through the 66-kV inter-array cables, providing a structured electrical layout that simplifies the cable termination workscope while still requiring rigorous quality control. Cable termination and testing services involve precision work at the interface between high-voltage cables and turbines or substations, where any defects can compromise the operational reliability of the wind farm and create future maintenance liabilities. Specialist providers with proven track records in this scope are increasingly important to project execution as offshore wind systems scale in size and complexity.

 

Technical Importance of 66-kV Inter-Array Systems

 

The 66-kV voltage level has become the standard for inter-array cable systems on modern offshore wind farms, replacing the earlier 33-kV configuration that was widely used a decade ago. The shift to 66-kV provides significant advantages, including reduced electrical losses, the ability to support fewer offshore substations per project, and better alignment with the larger turbine ratings now being deployed across European offshore wind sites. The technical demands placed on cable termination and testing services have risen alongside this voltage increase, since 66-kV systems require more precise installation tolerances, more rigorous testing regimes, and tighter quality assurance frameworks. Specialist contractors capable of meeting these standards consistently are now a critical part of the offshore wind supply chain.

 

Operational Schedule and Delivery Window

 

The main offshore campaign is expected to begin in the second quarter of 2026, providing a defined operational window for the cable termination and testing scope. Offshore campaigns of this nature are typically structured around the availability of installation vessels, weather windows, and the sequential progression of upstream activities such as foundation installation, cable lay, and turbine erection. By aligning the SPIE Wind Connect scope with the Q2 2026 campaign start, the project programme positions termination and testing to follow cable lay activities directly, supporting integrated execution and minimising the time gap between cable installation and electrical energisation. Tight scheduling of these workstreams is increasingly important in the Baltic, where weather conditions can compress operational windows.

 

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Seaway7 Contracting Relationship

 

The contract has been awarded by Seaway7, one of the leading offshore wind installation contractors globally, providing SPIE Wind Connect with a direct working relationship with a major project execution partner. Seaway7's role as the contracting party reflects the way major offshore wind projects are typically structured, with installation contractors taking lead responsibility for the delivery of large workscopes and subcontracting specialist activities such as termination and testing to providers with focused capability. For SPIE Wind Connect, the relationship with Seaway7 is commercially significant because it provides exposure to a deep pipeline of offshore wind projects in which Seaway7 holds installation contracts, supporting the prospect of further awards on similar scopes across Europe.

 

SPIE Wind Connect's Strategic Positioning

 

Mike Senior, managing director of SPIE Wind Connect, has framed the contract as a reflection of the company's technical expertise in high-voltage cable termination and testing and its track record of delivering safely and reliably on large-scale offshore wind projects. The framing aligns with the broader competitive dynamics of the offshore wind supply chain, where specialised technical capability and execution reliability have become increasingly important differentiators. As project sizes grow and the volume of cable termination and testing scope expands across the European pipeline, providers with credible operational track records and the engineering depth to deliver consistently are well placed to capture additional workscope.

 

Wider Polish Baltic Offshore Wind Context

 

The Baltyk II and Baltyk III projects sit alongside several other Polish Baltic offshore wind developments at varying stages of progress, including Baltic Power, where foundation installation has recently been completed, and Baltica 2, which is moving toward construction. The collective scale of Polish offshore wind activity is reshaping regional supply chain demand, port infrastructure utilisation, and the operational footprint of leading European installation contractors. As multiple projects enter construction phases in parallel, the demand for specialist services such as cable termination and testing rises significantly, providing structural support for the growth of providers operating in the segment.

 

Implications for the European Offshore Wind Supply Chain

 

The contract reflects the broader maturation of the European offshore wind supply chain, where the sheer scale of upcoming activity is creating sustained demand for specialised technical services. Cable termination and testing has become a focused commercial segment in its own right, with providers competing on the basis of equipment, methodologies, and skilled labour availability. As 66-kV systems become standard and as projects continue to scale toward larger turbines, the technical envelope within which these contractors operate continues to expand. Providers that can demonstrate consistent delivery, rigorous quality assurance, and the ability to scale their workforce in line with project demand are likely to capture a disproportionate share of the next wave of contract awards.

 

Outlook for Polish Offshore Wind Construction Activity

 

With cable termination and testing now contracted for Baltyk II and Baltyk III and offshore activity scheduled to ramp up from the second quarter of 2026, the projects are entering one of the most operationally intensive phases of their development cycles. For Poland, the combined progression of multiple offshore wind projects through construction marks a pivotal moment in the country's energy transition, transforming the Baltic Sea into one of Europe's most strategically important renewable generation regions. For SPIE Wind Connect, the contract provides both a meaningful commercial opportunity and a high-visibility reference point for future tendering across the European offshore wind pipeline as the sector continues to scale through the latter half of the decade.