Scaling Offshore Wind Faces Global and Local Challenges, Experts Say

Offshore wind holds substantial potential as a renewable energy source but remains underutilised, with its development pace slower than needed to meet climate goals, experts say. The sector is being buffeted by global economic pressures including inflation and supply chain constraints, contributing to failed auctions and cancelled projects in recent years. National-level challenges around grid connections, vessel availability and port capacity add further obstacles that must be overcome if the industry is to scale to hundreds of gigawatts.

 

A Sector of Contrasts

 

The past year has revealed both the promise and the pressures facing offshore wind. The United Kingdom, a major market, produced nearly 20 percent of its generated electricity from offshore wind in 2025. Around 3,000 turbines generated enough power for approximately 15.5 million homes. Globally, 9.3 GW of capacity was connected to the grid during the year. A further 18.8 GW is estimated to be added by the end of 2026, pushing total global capacity above 100 GW.

Against this positive backdrop sit clear signs of difficulty. China dominated 2025 installations with 6.6 GW, while European countries added only around 3 GW. That pace falls short of many national targets tied to climate goals. Just 11.4 GW of new projects were awarded contracts in 2025, down sharply from 56 GW in 2024. This decline followed a series of failed auctions across several markets.

 

Cancelled Projects and Rising Costs

 

Several developers have abandoned major projects amid these pressures. In May 2025, Ørsted cancelled its UK-based Hornsea 4 project, which would have ranked among the world's largest. The company cited rising supply chain costs, higher interest rates and increased construction and operational risk. Mitsubishi ended three projects in Japan during 2025 for similar reasons. TotalEnergies later cancelled projects in Germany in May 2026, citing rising costs and grid delays.

Experts identify a cluster of economic factors behind this difficult period. Supply chain crunches and operational backlogs have strained the sector. Inflation elevated project costs after years of steady declines. One analyst described a global market affected by global challenges but still expected to move forward. This framing captures the sector's mix of near-term difficulty and longer-term optimism.

 

National-Level Obstacles

 

Beyond global pressures, individual countries face distinct challenges. The US sector confronts efforts by the Trump administration to derail planned projects. The administration has spent 2.6 billion dollars buying back offshore wind leases to prevent projects proceeding. This controversial approach has drawn widespread criticism. Some of these attempts have been blocked by the courts.

Even countries with supportive governments encounter significant barriers. A WindEurope report highlighted grid connection bottlenecks holding back European developments. Permitting delays present a further obstacle across multiple markets. Slower-than-expected growth in electricity demand has also affected the sector. One professor noted that the technology works, but delivering it at industrial scale, acceptable cost and reliable performance remains the real challenge.

 

The Drive Toward Larger Turbines

 

Turbine sizes have grown dramatically over the past decade. Two years ago, 11 MW turbines were common in installations. New installations now reach 14 to 15 MW and above. Larger turbines improve generation capacity while helping to reduce costs. They require fewer foundations, cables and lifts, enabling bigger projects overall.

This race toward larger turbines is being driven largely by China. A 20 MW turbine was installed at the Three Gorges wind farm earlier this year. Multiple Chinese companies are developing 25 MW turbines. Mingyang Smart Energy recently unveiled a 50 MW configuration combining two turbines on one floating platform. However, ever-larger turbines can raise component costs and demand larger installation vessels.

 

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Supply Chain and Standardisation

 

The rapid scaling of the sector has strained supporting infrastructure. Industry bodies have warned of gaps in the availability of foundation-laying vessels and turbine installers through 2030. The International Marine Contractors Association called for increased investment in ships and ports. More than 100,000 kilometres of subsea cables are expected between 2026 and 2040. This will require additional specialised vessels to meet demand.

Experts argue the industry must shift toward standardisation to scale effectively. Many wind farms are still developed project by project using bespoke designs. One professor advocated a move toward serial production and modular fabrication. Standardised interfaces and repeatable installation methods would support faster deployment. Some experts also suggested capping turbine sizes to give the supply chain a fixed technology set to respond to.

 

The Role of Floating Wind

 

Floating wind technology is seen as essential for meeting climate targets. Most installed capacity today uses fixed foundations in shallower coastal waters. Floating turbines can unlock deeper waters where shallow sites are scarce. This is particularly relevant for regions such as the Mediterranean and off Japan and South Korea. These areas lack the shallow coastal waters that fixed foundations require.

Current floating capacity remains minimal despite this potential. Less than 300 MW is installed, representing under 1 percent of total offshore wind capacity. Norway's Hywind Tampen is the world's largest floating farm at around 95 MW. Previous goals, such as Europe fitting 10 GW by 2030, have fallen through. One advocacy group now hopes for a single commercial-scale floating farm of around 250 MW by 2030 to unlock faster growth.

 

Waste and Circular Economy Concerns

 

Waste is a growing challenge across the wind sector. Thousands of tonnes of turbine blades reach the end of their life each year. These are made of complex materials and are largely sent to landfill. Some companies are investing in recyclable blades to address this. Vattenfall has developed a method to turn used blades into construction materials.

Experts stress that circular principles are essential for sustainable scaling. One researcher noted that current recycling efforts cover only small parts of the industry. She argued the sector should extend turbine lifespans and reduce reliance on critical minerals. One professor said circular economy principles are essential if offshore wind is to reach hundreds of gigawatts. Battery storage integration is also being explored to address the intermittence of wind generation.

 

Policy and Regulatory Solutions

 

Experts consistently emphasised the central role of policy in overcoming these challenges. Decreasing costs require stable demand across the supply chain, which starts with government policy. Contracts for difference are considered the gold standard for developer-government agreements. These schemes set a strike price that protects against energy market volatility. They offer developers greater certainty in an uncertain market.

Careful auction design and streamlined permitting emerged as further priorities. A series of failed auctions underlined the need for well-designed processes. Denmark revamped its scheme after a 2024 failure and regained interest in two sites. Experts recommended one-stop shops for permitting, as used effectively in the Netherlands. Meanwhile, emerging markets including the Philippines, Brazil and Chile are putting supportive policy frameworks in place.