SunZia
SunZia, U.S.
Together, SunZia Wind and Transmission comprise the largest renewable energy infrastructure project in U.S. history, generating 3.5 GW of locally produced energy from more than 900 wind turbines.
It is the largest onshore project Vestas has delivered in the country to date, supplying a total of 242 V163‑4.5 MW turbines and around 1 GW of installed capacity - set to power approximately 320,000 households (equivalent to the population of San Francisco).
A project of this scale and complexity, demands more than technical expertise. It requires resilience, trusted partnerships, and a shared commitment to lasting impact. The SunZia Wind Project is proof of what becomes possible when technology and purpose unite at scale.
Facts about the project
Technology
Vestas is supplying 242 V163-4.5 MW wind turbines to SunZia - the latest evolution of the proven 4 MW platform, which retains over 90% continuity with previous variants. With more than 80 GW installed and 21,000+ turbines operating globally, the platform brings a well-earned reputation for performance, durability, and reliability.
The V163-4.5 MW is optimized for low-wind conditions, and for SunZia, Vestas developed a site-specific power curve tailored to local wind and climate. This led to a key breakthrough: the custom 105-meter "SunZia Tower", which alone contributed to over 60% of the project's performance target.
Connecting to a high-voltage direct current (HVDC) transmission line introduces a different set of challenges. Vestas' full converter architecture meets HVDC-specific demands, including superior lightning-strike tolerance, thereby reducing substation investment while delivering a higher-performing project overall.
Partnership
Building the energy systems and infrastructure of the future requires strong partnerships across the renewable energy eco-system. As such, Vestas and Pattern’s relationship of trust and transparency has played a significant role in the success of this story. Pattern was clear about the project's needs, and Vestas responded with flexibility and tailored solutions, including optimized technology and climate-adaptive design.
One standout example is the project's direct current long-distance transmission line; a rare and complex feature for onshore wind. Vestas’ ability to adapt its solutions for this large-scale application was a direct result of the open, collaborative nature of the partnership.
Manufacturing
As part of a broader wave of U.S. wind development, the SunZia Wind Project contributed to a $40 million investment across two of Vestas’ Colorado facilities. The Brighton Nacelle factory grew from 150 to 550 employees and the Windsor Blade factory expanded from 250 to 1,200, enabled by domestic production of the V163‑4.5 MW turbine.
This project is about more than locally produced energy, it’s about the people who build it. From factory floor workers and engineers to assembly leads, the stories of our local workforce are central to this success.
Project Execution
From transportation and logistics to safe construction and commissioning, every element requires precise coordination across multiple states and stakeholders, demonstrating that giga‑scale projects are achievable with the right combination of partnership, innovation, and flexibility.
