One giant US power line will provide power for over 1 million homes
Long-distance HVDC lines could let wind-rich regions power AI-driven demand growth while cutting reliance on fossil-fuel plants.
Key takeaways
- SunZia, an $11 billion wind and transmission project built by Pattern Energy and Hitachi Energy, is now fully operational.
- The 550-mile HVDC line can carry up to 3,000MW from New Mexico to Arizona, enough for around 1 million US homes.
- Its fast-adjusting power flows help grid operators handle the duck curve by delivering more wind power in the evening.
- The project is expected to avoid roughly 9 million metric tons of carbon dioxide emissions in its first full year.
Cite or link to this article
Griffin, M. (2026) 'One giant US power line will provide power for over 1 million homes', 311 Institute, 18 June. Available at: https://www.311institute.com/sunzia-hvdc-transmission-line-wind-power/ (Accessed: 25 October 2026).
The US needs power – a lot of power to fuel its massive Artificial Intelligence (AI) and data centre ambitions. And now SunZia, an $11 billion wind-and-power-line project and one of the largest US clean energy transmission projects ever built, is officially online.
Months after China unveiled a new world leading 8Gw transmission line Pattern Energy and Hitachi Energy announced that the SunZia Transmission line is now fully operational, carrying renewable electricity from New Mexico to customers across the Southwest.
The Future of the Global Energy Economy Keynote, a keynote by futurist Matthew Griffin
The 550-mile high-voltage direct current (HVDC) transmission line can move up to 3,000 megawatts (MW) of power from the SunZia Wind project in New Mexico to Arizona and customers across the western grid. That’s enough electricity for around 1 million US homes and comes at a time when power demand is climbing due to data centres, electrification, and industrial growth.
While the giant 3.65-GW, 916-turbine SunZia Wind has grabbed plenty of headlines, getting that electricity to where it’s needed is just as important. The new transmission line makes that possible, moving large amounts of wind power over long distances with relatively low energy losses.
The project is also a major milestone for US grid infrastructure. The ±525-kilovolt HVDC line is the largest voltage source converter-based HVDC installation in the US and one of the largest in the world.
Another benefit is its ability to help grid operators deal with the so-called “duck curve” – when solar production falls in the evening, but electricity demand remains high. Because the HVDC system can quickly adjust power flows, it can deliver more wind power during those hours and reduce reliance on fossil-fuel power plants.
The system is also designed to support grid stability during changing conditions, including weather-related disruptions.
SunZia’s impact is likely to be substantial. The project is expected to avoid roughly 9 million metric tons of carbon dioxide emissions in its first full year of operation. According to the companies, that’s equivalent to taking about 3 million gasoline-powered cars off the road for a year.
First published on Fanatical Futurist on 18 June 2026.
311 Intelligence
What this means
Analysis by the 311 Strategic Intelligence Unit
The big shift is from building generation to building the wires that move it. SunZia shows that the bottleneck for clean power is often transmission, not turbines. Our Starburst data backs this up: we track Supergrids, long-distance high-voltage lines that move clean power where it is needed, as an Explore trend, and we rate the AI Power Demand Surge, AI making power the main limit on data centre growth, an Act now trend.
What it means by sector.
- Energy and utilities: a single 550-mile line can carry 3,000MW, enough for around 1 million homes. We rate Electricity Demand Rebound, data centres, electric vehicles and industry adding new load, an Act now trend.
- Technology and data centres: the article links rising US power demand to AI and data centres. Access to large volumes of clean power, delivered over long distances, is becoming a siting factor.
- Grid operators: fast-adjusting HVDC flows help manage the duck curve. We expect Smart Grids, networks that spot changes in use and adjust quickly, to be in wide use by 2030.
What to do now.
- Map where your future power will come from, and how it will reach you, before you commit to new sites.
- Ask your energy suppliers how new transmission will change prices and availability in your region.
- Treat evening demand peaks as a planning issue, not just a utility issue, if you run energy-heavy operations.
The Starburst technologies behind this story
From the 311 Technology Starburst (first product, expected wide use and readiness):
| Technology | Category | First product | Wide use | Action | TRL |
|---|---|---|---|---|---|
| Smart Grids | Energy | 2010 | 2030 | Prepare | 9 |
| Grid Forming Inverters | Energy | 2021 | 2031 | Explore | 9 |
And the trends they feed, from the 311 Trends Starburst:
| Trend | Wide use | Action |
|---|---|---|
| Supergrids | 2035 | Explore |
| AI Power Demand Surge | 2027 | Act now |
| Electricity Demand Rebound | 2026 | Act now |
| Grid Connection Bottlenecks | 2025 | Act now |
How this moves the trend
The idea of moving clean power over long distances is not new. In 2016 Asia and Europe drew up plans for a global energy grid, and in 2021 we looked at transcontinental supergrids. By 2024 AI companies faced massive energy headaches, and in 2026 China started building an 8GW green energy highway. SunZia is the US putting the same idea into service.
Go deeper with 311
- The 311 Starburst Centre: every technology and trend above, with timelines and readiness.
- 311 Vantage: ask what new transmission and rising power demand mean for your organisation and get a plain English executive brief.
- The Exponential Technology Codex and the Annual Trends Codex: the technologies and trends reshaping every industry.
- Book a briefing or keynote on the future of energy and infrastructure for your board or leadership team.
FAQ
What is the SunZia transmission line?
SunZia is a 550-mile high-voltage direct current transmission line built by Pattern Energy and Hitachi Energy. It carries up to 3,000MW of wind power from the SunZia Wind project in New Mexico to Arizona and the western grid, enough electricity for around 1 million US homes.
Why does the US need new transmission lines like SunZia?
Power demand in the US is climbing due to data centres, electrification and industrial growth. Generating wind power is only half the challenge, and lines like SunZia move large amounts of it over long distances with relatively low energy losses.
How does SunZia help with the duck curve?
The duck curve is when solar production falls in the evening but electricity demand stays high. Because SunZia's HVDC system can quickly adjust power flows, it can deliver more wind power during those hours and reduce reliance on fossil-fuel power plants.
What is special about SunZia's HVDC technology?
The ±525-kilovolt line is the largest voltage source converter-based HVDC installation in the US and one of the largest in the world. It is also designed to support grid stability during changing conditions, including weather-related disruptions.
What impact will SunZia have on emissions?
The project is expected to avoid roughly 9 million metric tons of carbon dioxide emissions in its first full year of operation. The companies say that is equivalent to taking about 3 million petrol-powered cars off the road for a year.
About the author
Matthew Griffin Founder, 311 Institute
Matthew Griffin is a multi-award winning Futurist and expert in Disruption and Innovation, Geopolitics, Leadership, and Technology, who NASA have described as a "walking encyclopaedia of the future" and a "futurist Polymath."
Read full bio
Matthew Griffin is a multi-award winning Futurist and expert in Disruption and Innovation, Geopolitics, Leadership, and Technology, who NASA have described as a "walking encyclopaedia of the future" and a "futurist Polymath." 15-time best selling author of the "Codex of the Future" series, Matthew is the Founder and Futurist in Chief of the 311 Institute, a global Futures and Deep Futures advisory firm working with royal households, world leaders, G7, G20, and G77 governments, NGOs, and multi-national mid and mega cap firms to help them explore, shape, and lead the next 50 years of business and society.
An award-winning YouTube creator with over a million followers, with an unrivalled global reach and impact, Matthew is a highly sought-after international keynote speaker, lecturer, and mentor who collaborates with global leaders through the United Nations Alliance of Civilizations (UNAOC) and United Nations General Assembly (UNGA) to shape pivotal initiatives such as the UN’s AI for Humanity program, the United Nations Conference of the Parties (UN COP), and the World Economic Forum in Davos.
As the former Global Head of Cloud, National Security, and Enterprise Sales for companies including Atos, Dell-EMC, and IBM, Matthew has a proven track record of building multi-billion dollar business units and turning failing divisions into market leaders. His ability to identify, analyse, and communicate the implications of hundreds of emerging technologies and trends is unparalleled, and his insights are trusted by many of the world’s most respected organisations, including ABB, Accenture, Adidas, AON, ARM, BCG, Centrica, Citi, Coca-Cola, Dentons, Deloitte, Dow Jones, EY, Google, KPMG, Lego, Legal & General, LinkedIn, Microsoft, PepsiCo, Qualcomm, RWE, Samsung, Siemens AG and Siemens Energy, T-Mobile, UBS, VISA, Walmart, Workday, Worldpay and many others.
Regularly featured in the global media including the AP, BBC, Bloomberg, CNBC, Discovery, Forbes, Khaleej Times, Telegraph, TIME, ViacomCBS, WIRED, and the WSJ, Matthews mission is to help organisations create a fair and sustainable future whose benefits are shared by everyone irrespective of their ability, background, or circumstances.
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Sources and further reading
- Pattern Energy patternenergy.com
- Hitachi Energy hitachienergy.com
- Confronting duck curve how address over generation solar energy energy.gov