Europe’s offshore wind sector is entering a more constrained phase as turbine supply tightens and market power shifts toward a smaller group of manufacturers, raising concerns about costs and project delivery timelines.
The region’s expansion plans have long relied on three major suppliers, GE Vernova, Siemens Gamesa and Vestas.
However, GE Vernova’s decision to pause new offshore wind orders following technical and operational challenges has effectively narrowed the field to two dominant players.
Siemens Gamesa and Vestas now account for the vast majority of turbines available to European developers, concentrating supply in an already complex market.
Analysis from Rystad Energy indicates that turbine pricing has surged significantly, with per-megawatt selling prices rising between 40 per cent and 45 per cent since 2020.
This increase has outpaced underlying manufacturing cost growth, which has climbed by around 20 per cent to 25 per cent over the same period.
The gap highlights a shift in pricing dynamics, with manufacturers regaining leverage after a period of margin pressure.
Supply constraints are most evident in the production of nacelles and blades, the most technically demanding components of offshore turbines.
Nacelles, which house key systems including generators, gearboxes and power electronics, have emerged as a bottleneck due to limited supplier diversity and high manufacturing complexity.
Blade production is facing similar pressure as turbines grow larger, requiring longer production cycles and more challenging transport and installation processes.
By contrast, tower manufacturing remains relatively flexible, supported by a broader supplier base and lower barriers to entry.
The tightening supply chain comes as Europe continues to pursue ambitious offshore wind targets backed by strong political support.
However, the imbalance between demand and available manufacturing capacity is reshaping the market.
Developers are increasingly competing for limited turbine availability, while manufacturers are becoming more selective in project commitments and contract terms.
The evolution of turbine technology is also contributing to rising costs.
Between 2020 and 2027, the market has rapidly shifted from smaller 9 to 10-megawatt turbines to larger models in the 14 to 15-megawatt range.
Siemens Gamesa led the transition into higher-capacity turbines, followed by Vestas, whose 15 megawatt platform has gained traction in recent years.
These next-generation turbines are significantly more complex than earlier models, increasing both production costs and technical risk.
Earlier contracts signed in 2020 and 2021 were based on relatively stable input costs, leaving manufacturers exposed when inflation surged between 2021 and 2023.
During that period, suppliers absorbed rising costs, compressing margins across the sector.
As those contracts have expired, newer agreements reflect updated pricing structures, shifting more of the financial burden onto developers.
Rystad Energy’s modelling suggests that cost increases are unevenly distributed across the value chain.
A hypothetical 30 per cent rise in selected input costs would translate into an overall manufacturing cost increase of about 17 per cent, underscoring how certain components drive disproportionate cost pressures.
With supply conditions tightening, manufacturers are now better positioned to pass these increases through via higher prices and stricter contractual terms.
The result is a structurally tighter offshore wind market in Europe, where limited supplier diversity, growing turbine complexity and rising costs are converging.
Without significant expansion in manufacturing capacity or adjustments to procurement frameworks, the region may struggle to meet its long-term offshore wind targets at the pace and cost required for the energy transition.
