Project Overview

The Hai Long Offshore Wind Power Project in Taiwan is an offshore wind farm project mainly developed by Northland Power Inc. and Mitsui & Co. with a total installed capacity of 1,022 MW. 

The installation of a 1,022 MW capacity will be carried out in two phases: Hai Long 2 (HL2) and Hai Long 3 (HL3). Furthermore, HL2 is subdivided into two phases, namely HL2A (294 MW) and HL2B (728 MW). Similarly, HL3 will have a generation capacity of 504 MW. Upon its completion (expected by 2027), it will be one of the largest offshore wind farms in Taiwan. 

The Hai Long Project will be crucial to Taiwan's goal of building 15 GW of offshore wind by 2035. Taiwan further aims to achieve net-zero greenhouse gas emissions by 2050 and to install 40 to 55 GW of offshore wind power generation capacity. By completing the project, more than one million households will be able to consume the equivalent amount of electricity each year in Taiwan. 

Project Background & Details

The wind farms will feature 73 SG 14-222 DD offshore wind turbines (Siemens Gamesa Renewable Energy) installed on tripod casing-type underwater foundations, which are approximately 94 m high, weighing 2,000 tons for a single seat. 

Construction of the Hai Long 2 Foundation commenced on April 11, 2024. By November 19, 2024, all 37 Jacket Foundations and the Offshore Substation Topside were fully installed, marking the completion of Hai Long 2.  

The construction of the Hai Long 3 Foundation commenced in March 2025, with an expected completion date in mid-2025. As of July 2025, 13 out of 73 foundation jackets have been successfully installed. 

Two Offshore substations are built and fabricated at PTSC M&C’s yard in Vung Tau City, Vietnam. The groundbreaking ceremony for the Hai Long 2 and 3 offshore substations took place on November 4, 2022. The Hai Long 2 substation installation was completed in May 2024, and the Hai Long 3 substation installation was completed by March 2025. 

The onshore substation is located in the Chaghua Binhai Industrial Zone of Changhua County. The substation is equipped with four transformers connected to all three wind farms. These substations encompass high-voltage gas-insulated switchgear, air conditioning equipment, a diesel generator, and other heavy electric equipment. 

On June 12, 2025, the entire Hai Long offshore wind project, including both onshore and offshore substations, delivered its first power to Taiwan's grid. It confirms the successful commissioning and activation of the onshore substation.

Final Investment Decision for the Hai Long Offshore Wind Project

The joint venture between Mitsui & Co., Ltd. and Northland Power Inc. (NPI), a global independent company based in Canada, made the final investment decision (FID) on September 22, 2023. 

Power Purchase Agreement

In February 2019, Northland Power and Taipower (Taiwan Power Company) signed a 20-year power purchase agreement (PPA) for the Hai Long 2A. The agreement was signed under a feed-in tariff allocation, with rates structured for terms ranging from 10 to 20 years. For the first 10 years, the rates were set at NTD 6.2795/kWh, and for the next 10 years, at NTD 4.1422/kWh. 

Furthermore, in July 2022, Northland Power signed another Corporate Power Purchase Agreement (CPPA) with an investment-grade counterparty to supply its full power generated from Hai Long 2B and Hai Long 3, which have a total capacity of 728 MW. 

The deal is for 30 years and at a fixed rate, commencing once Hai Long reaches full commercial operations in late 2026. The contracted price under the CPPA is more favorable than the fixed auction rate initially awarded in 2018.

Project Location

The Hai Long Offshore Wind Power Project is located in the Taiwan Strait, approximately 45-70  km off the coast of Changhua County. It is on the west coast of Taiwan at water depths of nearly 55 m. 

Due to its proximity to grid connection points and major industrial hubs, the project facilitates efficient energy transmission and logistical support.

Project Cost

The total estimated cost for the Hai Long Offshore Wind Project is approximately JPY 960 billion (approximately USD 6 billion). Out of it, approximately JPY 540 billion (approximately USD 3.67 billion) is raised through project financing. It includes the Japan Bank for International Cooperation, Nippon Export and Investment Insurance, and other financial institutions worldwide. 

Hai Long Offshore Wind Farm 2

The Hai Long Offshore Wind Project is to be built in two phases, i.e., Hai Long 2 and Hai Long 3. Furthermore, Hai Long 2 is subdivided into two parts, namely Hai Long 2A (294 MW) and Hai Long 2B (224 MW). Making a total capacity of 1022 MW (HL2 - 518 MW and HL3 - 504 MW), the project marks one of Asia’s most significant offshore wind initiatives. Below is the descriptive breakdown for the HL2A and HL2B. 

Hai Long 2A

Capacity & Turbines

Operated by 21 Siemens Gamesa SG 14-222 DD wind turbines, Hai Long 2A has successfully installed a 294 MW capacity. Each turbine has a nameplate capacity of 14 MW, with the ability to boost that capacity to 15 MW by using the Power Boost feature. The turbines feature 108-meter-long blades and a 222-meter rotor diameter. The site benefits from average wind speeds of 10-11 m/s at hub height, ideal for efficient energy generation.

Construction & Infrastructure 

The Century Iron & Steel Industrial and Century Wind Power constructed the three-legged jacket foundations for HL2A. CSBC supplied Pin Piles BC. As of now, 20 out of 21 turbines have been installed.

Hai Long 2B

Capacity & Turbines

Driven by 16 Siemens Gamesa SG 14-222 DD turbines, the HL2B has a total capacity of 224 MW. Each turbine has a capacity of 14 MW, with the potential to boost the capacity to 15 MW. The HL2B also spotlights 108-meter-long blades and a 222-meter rotor diameter, ensuring high efficiency. Located at water depths of 35-55 meters, the site has an average wind speed of 10-11 meters per second at hub height.  

Construction & Infrastructure

Similar to HL2A, construction for HL2B started in 2023, with the jacket foundations completed in November 2024. The construction of the HL2B is carried out by Samkang M&T, with pin piles supplied by EEW. Installation of the turbine is in progress, and completion is expected to coincide with 2A's schedule. 

Hai Long Offshore Windfarm 3

Hai Long 3 is located approximately 50-70 kilometers off the coast of Changhua, with a water depth of 40-55 meters. Wind speeds average 10-11 m/s at the site, making it perfect for offshore wind generation. 

Capacities & Turbines

Operated by Siemens Gamesa SG 14-222 DD wind turbines, Hai Long 3 has a total capacity of 512 MW. Located in front of Taipei Main Station, the turbine resembles the Shin Kong Mitsukoshi Department Store in terms of height, highlighting its impressive scale.

The partnership with Siemens Gamesa has also led to expanded investment in Taiwan, including the upgrade of the Nacelle 1.0 facility in the Port of Taichung to become the only complete Nacelle assembly factory in the Asia-Pacific region, which has tripled the land area and employment.

Hai Long Project Contractors & Suppliers

Hai Long Project Investors

Timeline

Latest news on the Hai Long Offshore Wind Project

Northland Power Receives Its First Power On Hai Long Offshore Wind Project

On June 12, 2025, Northland Power announced that its first power from the Hai Long Offshore Wind Project had been produced and is connected to Taipower’s Grid. The achievement reinforces the project’s strong momentum in construction.

The Commission of both onshore and offshore substations is also part of this milestone, further highlighting the project's progress towards commercial operations in 2027. 

Since the start of construction, Hai Long has witnessed immense growth in the process, including the production of jacket foundations and pin piles, installation of the Hai Long 2 and 3 offshore substations, installation of all 219 pin piles, assembly of Taiwan’s first locally manufactured 14 MW wind turbine nacelle and the installation of 14 out of 73 turbines.

Benefits

• Local Talent Development: The offshore wind project promotes local talent development through training and educational programs.

• Public-private collaboration: It fosters partnerships and international cooperation involving global partners, such as Northland Power (Canada) and Mitsui (Japan), as well as international contractors.

• Alignment with 2035 goals: The project aligns with Taiwan’s goal of developing 15 GW of offshore wind by 2035. 

• Energy Generation: The project will generate approximately 1 GW of clean, renewable energy, supplying it to nearly 1 million households in Taiwan.
  

• Environmental benefits: The project reduces carbon emissions and generates clean power, aligning with Taiwan’s aims to achieve net-zero greenhouse gas emissions by 2050. 

• Improved Grid Resilience: By combining advanced offshore substations and export systems, the grid’s adaptability is enhanced.

Conclusion

The Hai Long Offshore Wind Project, with a total capacity of 1,022 MW, comprises three farms: HL2A, HL2B, and HL3. Located approximately 50 km off the coast of Changhua County, it uses Siemens Gamesa turbines mounted on jacket foundations. Benefiting from the average wind speed of 10-11 m/s at hub height, the site is an exemplary location for offshore wind generation. 

The project marks a milestone for Taiwan’s goal of a sustainable energy future. Through localization and workforce training, it strengthens the country's commitment to clean energy and boosts local industry development. As the Hai Long Project nears completion by 2027, it is poised to deliver green energy to over 1 million households, transforming the offshore wind landscape.

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