The SunZia wind project in New Mexico has been supplying electricity to about one million households in Arizona and California since June 18, 2026. With a rated capacity of 3,650 megawatts, it is the largest wind-power project in the Western Hemisphere—more than twice as large as the previous US record holder. That the project came online despite the anti-renewable energy policy of the US federal government has a simple explanation: the decisive federal permits were already in place before the change of administration.
Twenty Years from Planning to Power Outlet
The project's origins date back to the administration of George W. Bush. Developers began environmental assessments and regulatory discussions in New Mexico and Arizona starting in 2006. The project changed hands several times before Pattern Energy, a US company specializing in renewable energy, took full control in 2022. Actual construction began in September 2023.
The project cost a total of eleven billion dollars, making it the largest private clean-energy infrastructure project in US history. At the peak of the construction phase, more than 2,000 people were employed, with about 90 percent from New Mexico. In a state that frequently imports skilled workers for major projects, this was a deliberate choice. After construction concluded, more than 100 permanent operating positions were created. The 916 wind turbines are distributed across three counties in central and southern New Mexico: Lincoln, San Miguel, and Torrance.
Electricity flows from there via an 890-kilometer high-voltage direct current (HVDC) transmission line to Arizona and then on to California. Direct current lines of this distance have decisive advantages over alternating current lines: they lose significantly less energy over long distances and integrate more easily into the existing grid.
What 3,650 Megawatts Means in Practice
The scale becomes tangible in direct comparison. Alta Wind in Kern County, long the largest wind farm in the USA, reaches about 1,550 megawatts. Great Prairie Wind in Texas follows with 1,027 megawatts. SunZia exceeds both combined by a wide margin. The Hoover Dam on the Colorado River, since its completion in 1936 a symbol of American infrastructure, has a rated capacity of 2,079 megawatts—43 percent less than SunZia.
European megaprojects provide another benchmark: Hornsea Two off England's east coast, one of Europe's largest offshore wind projects, generates 1,320 megawatts—not even 40 percent of SunZia's capacity. Around one million US households can be powered with electricity from the project, equivalent to the electricity needs of approximately three million people.
The first effect on the power grid appeared even before full operation: when initial capacity was added in May 2026, California's grid reached a new wind record of 7,122 megawatts according to TechTimes, about 20 percent above the previous high from 2024.
A Project Despite Anti-Renewable Federal Policy
Since January 2025, the US federal government under President Donald Trump has actively braked renewable energy expansion. Permitting procedures for new wind and solar projects were extended, offshore wind parks blocked, tax benefits for renewables cut. In April 2026, a US federal court prohibited the government from several of these measures as unlawful.
SunZia remained unaffected by these interventions because decisive federal permits predated the change of administration. This illustrates a structural pattern: projects with long lead times and early-secured permits can withstand political course changes. New wind projects just entering the planning phase now are heavily dependent on the current federal government's stance.
What Critics Point Out
Construction of the 890-kilometer transmission line left its mark. Environmental groups documented that access roads caused significant erosion damage, sediment retention basins failed in several locations, and silt entered the San Pedro River. The San Pedro is one of Arizona's last free-flowing rivers and vital habitat for migratory birds, fish, and amphibians. Several indigenous tribes also raised objections about impacts to culturally significant sites along the transmission route, as Inside Climate News reported.
Pattern Energy stated that it had installed silt fences and retention basins. Environmental groups disputed whether these measures were sufficient. Long-term impacts on the San Pedro ecosystem remain undocumented.
What Europe's Energy Policy Can Learn from SunZia
What is lacking to realize a comparable project in Europe is less technology than infrastructure for long-distance transmission. Germany has been discussing SuedLink and SuedOstLink—high-voltage direct current lines that would transport wind power from the wind-rich north to the power-hungry south—for more than a decade. The principle is identical to SunZia: generation where the wind blows, consumption where industry and population concentrate. SuedLink is currently scheduled for 2028 and already has more than fifteen years of planning behind it.
The real obstacle is not technical. It is lengthy permitting procedures, broad litigation opportunities, and the political will to prioritize transmission infrastructure. SunZia required twenty years because all these elements had to align in the US as well. The same holds for Europe: whoever begins planning similar long-distance lines now will see the result in the 2040s.