Project Overview

Greater Changhua 2b (GC2b) is a 337.1 MW offshore wind farm located 35–60 km off the coast of Changhua County in the Taiwan Strait, developed by Ørsted. Comprising 24 Siemens Gamesa SG 14-236 DD 14 MW turbines mounted on piling-free suction bucket jacket foundations, it is developed and operated in tandem. 

Adjoining the 583 MW Greater Changhua 4 project, it forms a 920 MW, 66-turbine combined development project which is the largest offshore wind project in Taiwan. Commercial operations for GC2b are targeted for Q3 2026. Greater Changhua 2b and 4 are the first offshore wind projects in the Asia-Pacific region to deploy suction bucket jacket (SBJ) foundations. 

The projects are also the first in the world to install 14 MW wind turbines with 115-metre-long blades. This was the largest wind turbine blade dimension deployed globally at the time of installation. The entire 66-turbine campaign was completed in 275 days using Cadeler's newly commissioned Wind Maker installation vessel. 

Ørsted has entered an agreement to sell 55 percent of the combined Greater Changhua 2 project (632 MW = GC2a + GC2b) to Cathay Life Insurance and Cathay Power, with the transaction closing timed to coincide with GC2b's commercial operations in Q3 2026. 

The project's completion will be a landmark for Taiwan's 2050 net-zero carbon strategy and a major contribution to the government's target of 5.3 GW of installed offshore wind capacity by the end of 2026. 

Greater Changhua 2b Location

The Greater Changhua 2b offshore wind farm is situated in the Taiwan Strait, approximately 35–60 km off the coast of Changhua County on the central-west coast of Taiwan. The project lies within the broader Greater Changhua offshore wind zone, with water depths ranging from about 23.8 to 44.1 m across the combined Greater Changhua 2b and 4 development area. 

Technical Specification

Greater Changhua Complex - All Four Phases

Project Background

Greater Changhua 2b is part of Ørsted’s flagship Taiwan offshore wind portfolio and one of the largest renewable energy CPPA‑backed developments in the Asia‑Pacific region, with the 920 MW 2b & 4 cluster linked to major corporate off‑takers.

The project reached final investment decision (FID) in March 2023, with offshore construction commencing in February 2025 and turbine installation beginning in April 2025. It comprises 24 Siemens Gamesa SG 14‑236 DD wind turbines, each rated at 14 MW in water depths of roughly 23.8–44.1 m. 

First power from the combined 2b and 4 cluster was delivered to Taiwan’s grid in mid‑2025, but commissioning of Greater Changhua 2b was later delayed to Q3 2026 due to damage to an export cable. 

On 23 December 2025, Ørsted signed an agreement with Cathay Life Insurance, the leading life insurance company in Taiwan, and its affiliate Cathay Power (together 'Cathay'), under which Cathay will acquire a 55% ownership stake of Ørsted's 632MW Greater Changhua 2 Offshore Wind Farm. 

The project is being developed under a corporate power purchase agreement (CPPA) framework and is expected to be fully grid-connected and commercially operational in 2026, contributing to Taiwan’s renewable energy targets and serving large corporate off‑takers.

The sale of a majority stake to Cathay provides long‑term institutional investment while allowing Ørsted to continue as the technical and operational lead, aligning with its strategy of recycling capital from operational/near‑operational assets into new offshore wind development. 

Greater Changhua 2b Current Status

As of 2026, the Greater Changhua 2b offshore wind farm is in the final commissioning phase and remains on track for full commercial operation expected by Q3 2026. All 24 turbines at Greater Changhua 2b (and all 42 at Greater Changhua 4) have been installed since January 2026, all inter‑array cables have been laid and energized, and the entire 920 MW 2b & 4 cluster is reported to be approximately 85% complete. It is undergoing final export‑cable works, grid‑integration, and system commissioning ahead of its Q3 2026 commercial operation date. 

Stakeholder Details

Greater Changhua 2b Cost Details

The Greater Changhua 2b project does not have a standalone, publicly disclosed capital cost. However, its financing is reported as part of the combined Greater Changhua 2 package (2a + 2b). Ørsted reached financial close on a TWD 90 billion (approximately USD 2.82 billion) project-finance package for the 632 MW Greater Changhua 2 cluster, which includes the operational 294.8 MW Changhua 2a and the 337.1 MW Changhua 2b under construction. 

Project Scope

The following is the project scope of the Greater Changhua 2b:

• Installed capacity and energy output: Greater Changhua 2b has a nameplate capacity of 337.1 MW and is designed to generate sufficient electricity to supply a large number of Taiwanese households annually, supporting national renewable energy targets. 
  

• Wind turbine installation: The project comprises 24 Siemens Gamesa SG 14‑236 DD turbines, each rated at 14 MW, installed on fixed‑bottom foundations in the Taiwan Strait. 
  

• Foundation system: Turbines are mounted on suction bucket jacket (SBJ) fixed‑bottom foundations, engineered for water depths of approximately 23.8–44.1 m and local seabed conditions.
  

• Offshore electrical infrastructure: The scope includes installation of 66 kV inter‑array cables linking all turbines to the offshore substation and onward to the onshore grid connection point. 
  

• Environmental and marine works management: Marine warranty surveyor (MWS) services and environmental compliance measures are included to manage offshore transport, installation, and seabed impacts. 

Project Timeline

Benefits

The following are the benefits of the project: 

• Contribute to Offshore Wind Target: Greater Changhua is Taiwan's largest offshore wind power asset, which aims to power approximately 2.8 million Taiwanese households and represent the single most significant contribution to Taiwan's 5.3 GW 2026 offshore wind target. 
  

• Powerful Offshore Turbine: The 14 MW Siemens Gamesa SG 14-236 DD turbines installed at GC2b are the most powerful offshore wind turbines deployed anywhere in the world at the time of their installation.
  

• Clean Power Generation: With 337.1 MW of installed capacity, Greater Changhua 2b will generate substantial clean electricity, displacing fossil-fuel generation and enhancing Taiwan’s energy mix. 
  

• Corporate decarbonization via CPPA: Developed under a corporate power purchase agreement (CPPA) framework, the project supplies renewable electricity to major corporate off‑takers, enabling them to reduce Scope 2 emissions and meet sustainability targets. 
  

• Energy security and diversification: By adding domestic offshore wind capacity, the project reduces reliance on imported fuels and diversifies Taiwan’s generation portfolio, improving long-term energy security.

Conclusion

The Greater Changhua 2b offshore wind farm is a strategically significant renewable energy project located off the coast of Changhua County, Taiwan. Developed by Ørsted as part of the larger 920 MW Greater Changhua 2b and 4 cluster, the project leverages advanced offshore wind technology suited to the site’s medium water depths and seabed conditions. It aligns with Taiwan’s national renewable energy targets and supports major corporate off‑takers in decarbonizing their electricity consumption.

Overall, Greater Changhua 2b will deliver substantial clean electricity, enhance grid infrastructure in Changhua, and contribute meaningfully to Taiwan’s energy security and climate objectives. Beyond its direct generation benefits, the project strengthens local supply chains, builds technical capability in offshore wind engineering, and reinforces Taiwan’s position as a leading offshore wind market in the region. 

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