SunZia Wind Farm Begins Commercial Operations as Largest US Wind Project
According to the U.S. Energy Information Administration, the SunZia Wind Project in New Mexico is entering commercial operations this month — marking the completion of the largest wind farm ever built in the United States.
The Project at a Glance
The SunZia Wind Project, developed by Pattern Energy, carries a net summer generating capacity of 3,650 megawatts (MW) and comprises 916 wind turbines spread across three counties in central New Mexico: San Miguel, Lincoln, and Torrance. That capacity is more than three times larger than the next two biggest wind farms in the country — Alta Wind in Southern California (1,098 MW) and Great Prairie in northern Texas (1,027 MW).
Construction began in 2023 after nearly two decades of permitting and planning. By April 2026, portions of the farm were already generating power during a testing phase and contributing to the grid.
The Transmission Piece
Getting the power to market required a companion infrastructure project: the SunZia Transmission Project, a 550-mile high-voltage direct current (HVDC) line running from central New Mexico to south-central Arizona. Of the transmission line’s 3,021 MW of total capacity, 2,131 MW will be delivered to Southern California via the Palo Verde Substation.
With SunZia now operational, wind generating capacity in New Mexico jumps from roughly 4,000 MW to approximately 7,650 MW — wind will represent 45% of the state’s total capacity mix, ahead of solar (19%) and natural gas (19%).
On May 15, 2026, the California Independent System Operator (CAISO) logged 7,122 MW of hourly wind generation — 20% above the previous annual record of 5,922 MW set in 2024.
What It Means for Subcontractors
- Scale of civil and electrical scope: 916 turbines across three counties represent years of civil grading, foundation work, and electrical installation. The SunZia construction cycle — 2023 through mid-2026 — is a reference case for what Tier 1 wind project build-outs look like in the Southwest: multi-year, multi-county, labour-intensive.
- HVDC transmission is a growing category: The 550-mile SunZia Transmission line is one of the longest HVDC projects built in the US in recent years. Transmission and distribution subcontractors with HVDC experience are in growing demand as grid-scale renewable projects require long-distance export corridors.
- Commissioning and O&M ramp-up: With commercial operations beginning this month, SunZia is entering the commissioning phase — and beyond that, long-term operations and maintenance contracts across a 916-turbine field. Electrical and mechanical subs with wind O&M capability should watch for procurement activity from Pattern Energy.
- Pattern Energy pipeline: SunZia is Pattern Energy’s flagship US project. Field service contractors who built relationships during the construction phase are positioned for follow-on work as the company expands its renewables portfolio.
