Project Overview

The Windanker Offshore Wind Farm is a 315 MW project under development in the Baltic Sea off the coast of Germany. Developed by the Iberdrola Group, the project will strengthen the Baltic Hub and will add over 1,100 MW of installed capacity. It is Iberdrola Group's third offshore wind farm in the Baltic. 

The Windanker project will invest over EUR 1 billion to generate 315 MW of electricity. Upon its operation (expected by the end of 2026), the electricity generated will be sold on the German market under a long-term Power Purchase Agreement (PPA). 

It produces enough electricity to power approximately 600,000 people per year. Along with it, the Windanker project reduces 672,000 tonnes of carbon dioxide in Germany, contributing to the country's goal of achieving an 80% share of renewables by 2030. 

Windanker Offshore Wind Farm Location

The Windanker Offshore Wind Farm is located in German waters of the Baltic Sea, approximately 38 kilometers northeast of the Jasmund National Park on Rügen Island, Germany. The project site is also described as being about 25-42 kilometers offshore from the German mainland, in the designated Westlich Adlergrund area.

Project Background

Following the successful completion of earlier projects in the region, Iberdrola expanded its Baltic operations with Windanker Offshore. It received all necessary regulatory approvals, including from the German Federal Maritime and Hydrographic Agency (BSH) in April 2025 and grid operator 50Hertz for the submarine cable route.

Construction officially commenced in the summer of 2025. The installation of the first monopile foundation occurred on October 2, 2025. Geotechnical studies continue to support ongoing site preparation.

Turbines are expected to be installed in 2026, making the Windanker Offshore Wind Farm project fully operational by late 2026. The 315 MW of electricity generated is enough to power approximately 315,000 households. 

Project contributes to EIB Group's TechEU initiative to accelerate EU innovation, supports climate action goals, and the REPowerEU plan to reduce dependence on fossil fuel imports.

Windanker Offshore Wind Farm Ownership Details

The Windanker Offshore Wind Farm project is developed by Japan's Kansai Electric Power Company (KEPCO) and Iberdrola Group. KEPCO entered the project in late 2024 as a co-investor, acquiring a 49% stake, while Iberdrola holds a 51% stake. 

Project Timeline

Windanker Offshore Wind Farm Cost

The total estimated cost for the Windanker Offshore Wind Farm project is approximately EUR 1.28 billion. It includes the overall development and construction cost for the 315 MW Wind Farm.

Project Scope

The project scope for the Windanker Offshore Wind Farm project includes the following:

• Wind Turbines: 21 Siemens Gamesa SG 14-236 DD turbines, each with a maximum capacity of 15 MW. The turbines feature a new-generation 236-metre rotor and direct-drive technology, allowing annual energy production to exceed that of previous models by over 30%.
  

• Foundation Installation: The project comprises up to 84 metre-long and 10 metre-diameter monopiles weighing 2,100 tonnes each, constructed by Windar Renovables and Navantia Strategic Projects.​
  

• Infrastructure: The Wind Farm incorporates inter-array cables, subsea infrastructure, and a transformer platform connected via submarine cable to the 50Hertz "Ostwind 3" transmission system.
  

• Construction & connection to the national grid: The wind farm constructs its own internal park cable and connects with the German National Grid via a submarine cable approved by grid operator 50Hertz. 
  

• Integration into Iberdrola's Baltic Hub: Upon integration, its total installed capacity would exceed 1.1 GW, including the Wikinger (350 MW) and Baltic Eagle (476 MW) wind farms.
  

• Remote Monitoring: The wind farm comprises panoramic remote monitoring and control systems for turbines, enabling enriched operational performance and reliability. 

Windanker Offshore Wind Farm Contractors

Windanker Offshore Wind Farm Investors

EIB and Iberdrola Sign A EUR 500 million Green Loan 

On November 3, 2025, the European Investment Bank (EIB) signed a EUR 500 million green loan with Iberdrola Group for the Windanker Offshore Wind Farm project. The Spanish export credit agency, Cesce, guarantees the financing. 

It is the first time the EIB and Cesce have used a guarantee to support green projects led by Spanish companies outside Spain, contributing to the European Union's climate action and environmental sustainability objectives.

This EUR 500 million loan agreement helps Iberdrola bring cutting-edge technology to the Baltic Sea, benefiting German Consumers and local economies. The electricity generated will also help Iberdrola secure Europe's independence from fossil fuel imports. 

Furthermore, the project contributes to the EIB Group's TechEU initiative to accelerate EU innovation, which aims to mobilise EUR 250 billion investments by 2027 for startups, scale-ups, and innovative companies across Europe.

Benefits

The Windanker Offshore Wind Farm project comes with the following benefits: 

• Supply electricity: The wind farm generates enough electricity to power approximately 600,000 people and 315,000 homes annually. 
  

• Clean energy supply: The 315 MW of electricity generated will be sold to the German market, contributing to Germany's clean energy supply.
  

• Reduce CO2 Emissions: Upon completion, the project will reduce approximately 672,000 tonnes of CO₂ per year, supporting Germany's climate goals and the transition to an 80% share of renewables by 2030.​
  

• Improves efficiency: The project installs advanced Siemens Gamesa SG 14-236 DD turbines, each with 15 MW capacity, boosting efficiency and annual energy production by over 30% compared to previous models.
  

• Increase total wind farm capacity: The Windanker Offshore Wind Farm integrates with Iberdrola's Baltic Hub in Germany, increasing the total wind farm capacity to over 1.1 GW. Overall, it boosts Germany's renewable energy infrastructure. 

Conclusion

The Windanker Offshore Wind Farm is a 315 MW project under construction in the Baltic Sea off the coast of Germany. It is developed by Japan's Kansai Electric Power Company (KEPCO) and Iberdrola Group, which hold 49% and 51% stakes in the project, respectively. Being Iberdrola's third offshore wind farm in the Baltic, it will add over 1,100 MW of installed capacity. 

With the construction starting in summer 2025, the project is expected to be fully operational by late 2026. The project is equipped with 21 advanced Siemens Gamesa SG 14-236 DD turbines, generating enough electricity to power approximately 600,000 people per year. 

Along with it, the Windanker project reduces 672,000 tonnes of carbon dioxide in Germany, contributing to the country's goal of achieving an 80% share of renewables by 2030. It also contributes to economic development through a total investment of over EUR 1 billion. 

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