Largest wind farm in the United States starts commercial operations

Data source: U.S. Energy Information Administration, Preliminary Monthly Electric Generator Survey, April 2026

The SunZia Wind Project, the largest wind farm in the United States, began commercial operations this month. The wind farm, located in New Mexico, has a total net summer generating capacity of 3,650 megawatts (MW) and is composed of 916 wind turbines. SunZia’s capacity is more than three times larger than the next two largest wind farms, Alta Wind in Southern California (1,098 MW) and Great Prairie in northern Texas (1,027 MW). The SunZia Wind Project works with a high voltage transmission line to deliver the wind power generated to Arizona and California.

Pattern Energy started construction of the SunZia Wind Project in 2023, after almost two decades of permitting and planning. The wind farm spans three counties. The northern part of SunZia located in San Miguel and Lincoln counties has 242 turbines, while the southern part in Lincoln and Torrance counties has 674 turbines. By April 2026, some of the wind turbines were producing power and contributing to the grid during a testing phase.

Before the SunZia Wind Project came online, net summer wind generating capacity in New Mexico totaled 3,997 MW. The new capacity from SunZia will bring total wind capacity in New Mexico up to 7,647 MW. With this addition, wind accounts for 45% of the capacity mix in the state, followed by 19% from solar and 19% from natural gas capacity.

Most of the electricity generated at SunZia will be exported to Arizona and to Southern California. To be able to export the power generated by this project, Pattern Energy also built the SunZia Transmission Project—a 550-mile high voltage direct current transmission line that goes from the SunZia Wind Project site in central New Mexico to south-central Arizona. Of the SunZia transmission line’s 3,021 MW of power capacity, 2,131 MW will be delivered and consumed in Southern California via the Palo Verde Substation.

Generation from the SunZia Wind Project is reported by the California Independent System Operator (CAISO) in EIA's Hourly Electric Grid Monitor. On May 15, 2026, CAISO reported 7,122 MW of hourly wind generation, which is 20% higher than the previous annual record of 5,922 MW in 2024.