Principle Power’s WindFloat® Projects Reach Key Milestone with 1 TWh Energy Delivered to the Grid

Emeryville, CA, September 3, 2025 – Principle Power announces that floating offshore wind projects using the WindFloat® technology have generated more than 1 terawatt-hour (TWh) of energy production since WindFloat 1 was connected to the grid in 2011. This milestone demonstrates the maturity of the WindFloat® designs, and the readiness of the company’s 4th generation designs for commercial scale projects.  

The 1 TWh output includes generation from:

• WindFloat 1: 2 MW pilot in Portugal (2011-2016) and Scotland (2018-2020)
• WindFloat Atlantic: 25 MW project in operation since 2020 off the coast of Portugal
• Kincardine Offshore Wind Farm: a 48 MW project in operation since 2021 off the coast of Scotland.

Together, these assets have demonstrated robustness in severe Atlantic and North Sea conditions, withstanding waves of up to 20 meters and winds of up to 214 Km/h (equivalent to a Category 4 typhoon), while delivering exceptional performance.

The WindFloat® platforms enable maximum wind turbine generation through a combination of empirically validated features:

• Semisubmersible architecture, providing a stable platform that enables the system to comply  with all wind turbine operational and extreme limits.
• A platform hull trim system that uses water ballast to counteract wind turbine-induced thrust forces, keeps the wind turbine oriented vertically (within 0-2 degrees >97% of the time), increasing energy production by up to 2.5% versus passive platforms.
• A robust and redundant system architecture that is delivering an average platform availability of ~99% across the operating fleet.

Building on the experience of WindFloat Atlantic, Kincardine, and the under construction 30 MW Les éoliennes flottantes du golfe du Lion (EFGL) project that will be connected to the grid later this year, Principle Power is working closely with clients, suppliers, and operators to plan the delivery of the first generation of commercial scale floating wind projects in key markets, including France, South Korea, and the UK. These projects expect to feature 12-70 wind turbines of 15-20 MW each, nearly double the rated capacity of the wind turbines installed at WindFloat Atlantic and Kincardine.

The operational data and insights from the first TWh of generation provide a strong basis of confidence for customers and their financial stakeholders, demonstrating that Principle Power and its WindFloat® technologies have the proven track-record to scale floating wind projects and support the global expansion of the industry.

Overview of Principle Power’s operating track record:

• 12 WindFloat® units installed or under installation or decommissioned
• 13 years of field operational experience and 17 project-years of cumulative operations: WindFloat 1: 2011-2016 in Portugal plus 2018-2020 in Scotland; WindFloat Atlantic: 2020-present in Portugal; Kincardine: 2021-present in Scotland.
• 300,000 hours of cumulative operational experience.
• 1 TWh global WindFloat® energy production.
• ~99% platform availability.
• 0 (zero) lost time incidents.
• 20 m maximum wave height encountered.
• 214 Km/h (59.6 m/s) maximum wind speed encountered (equivalent to category 4 typhoon).
• Completed tow-to-shore floating offshore wind turbine large corrective operations at Kincardine, proving the technical feasibility of the approach and yielding lessons to optimize planning for future tow-to-shore large correctives.
• Supported the world’s first in-situ floating offshore wind turbine large corrective operations at Kincardine, demonstrating feasibility for certain types of major component replacements, and providing optionality to developers.

About Principle Power

Principle Power is a global leader in floating wind technology, providing full lifecycle engineering services that deliver reliable, de-risked, and bankable solutions. Principle Power works with developers, independent power producers, utilities, and EPCs to deliver integrated designs that minimize project risk and maximize energy output. The WindFloat® portfolio consists of four modular platform technologies optimized for turbines above 15MW and suitable for any supply chain setup. With 75 MW capacity in operation (the 25 MW WindFloat Atlantic in Portugal, and the 50 MW Kincardine Offshore Wind Farm in Scotland) and 30 MW under construction (EFGL in France), the technology has proven resilient in the challenging Atlantic and North Sea weather conditions, delivering more than 1 TWh of clean energy since WindFloat 1 was installed in 2011.

Principle Power is working with customers and partners to commercialize floating wind in different regions with a robust project industrialization plan that emphasizes compatibility with existing manufacturing capacity, while also advancing a vision for purpose-built, automated WindFloat® factories to drive costs and schedule to a minimum. Principle Power offers unique, full-lifecycle services combining dedicated expert teams, validated design tools, and proven processes that have been refined based on real-world operational experience providing confidence from the earliest design phases. Principle Power has secured exclusivity to supply WindFloat® technology to commercial-scale projects in all key floating wind markets totaling 14+ GW of projects secured or under design contract.

For more information, visit principlepower.com