Largest Wind Farm in the United States Slated to Begin Commercial Operations

The SunZia Wind Project, poised to become the largest wind farm in the United States, is set to commence commercial operations this month. Situated in New Mexico, the facility boasts a net summer generating capacity of 3,650 megawatts (MW) across 916 turbines, dwarfing the next two largest US wind farms combined. The project spans three counties and is designed to supply renewable energy primarily to Arizona and Southern California via a dedicated high voltage transmission line. Construction of SunZia began in 2023 after nearly 20 years of permitting and planning, reflecting the complexity and scale of the undertaking. The wind farm is divided into northern and southern sections, with 242 turbines in San Miguel and Lincoln counties and 674 turbines in Lincoln and Torrance counties. By April 2026, some turbines had already been contributing power to the grid during testing phases, signalling a smooth transition to full operational status. The addition of SunZia significantly boosts New Mexico’s wind capacity, raising the state’s total from 3,997 MW to 7,647 MW. This expansion means wind energy now accounts for 45% of New Mexico’s electricity capacity mix, surpassing solar and natural gas, which each hold 19%. The project’s scale and output underscore the growing role of wind power in the region’s energy landscape. A critical component of the project is the SunZia Transmission Project, a 550-mile high voltage direct current line that transports electricity from central New Mexico to south-central Arizona. Of the transmission line’s 3,021 MW capacity, 2,131 MW is earmarked for delivery to Southern California through the Palo Verde Substation. This infrastructure ensures that the renewable energy generated can meet demand in key markets and supports California’s ambitious clean energy goals. The impact of SunZia is already evident in regional grid data, with the California Independent System Operator reporting record-breaking hourly wind generation of 7,122 MW in May 2026, surpassing previous records by a significant margin. This milestone highlights the growing contribution of large-scale wind projects to the stability and sustainability of the western US power grid.