The most economically successful wind farms share a few common traits: strong, consistent wind resources, proximity to transmission infrastructure, and favorable policy environments. No single public ranking exists of “most profitable” wind farms, because operators rarely disclose profit margins. But the data we do have points to clear patterns in what separates financially viable projects from those that struggle.
What Makes a Wind Farm Profitable
The single biggest factor in a wind farm’s financial success is how much electricity it actually produces relative to its capacity. This is called the capacity factor, and it varies enormously. A wind farm in a prime location with steady, strong winds might achieve a capacity factor of 40% or higher, while one in a mediocre site could sit below 25%. That gap translates directly into revenue.
For new onshore wind projects in the United States, the cost of generating electricity has dropped to roughly $26 to $32 per megawatt-hour (in 2024 dollars) for facilities expected to come online by 2030, according to the U.S. Energy Information Administration. That makes onshore wind one of the cheapest sources of new electricity available, which is a strong foundation for profitability. But those are averages. Individual projects can land well above or below that range depending on local wind speeds, construction costs, financing terms, and how far the power has to travel to reach the grid.
Large U.S. Wind Farms That Perform Well
Several massive onshore wind farms in the U.S. have operated profitably for years, largely because they sit in some of the windiest corridors on the continent. The Alta Wind Energy Center in Tehachapi, California, with roughly 720 megawatts of capacity, was for years one of the largest wind installations in the world. It benefits from strong, predictable winds funneling through mountain passes and from long-term power purchase agreements with California utilities, which guarantee a buyer for its electricity at a set price.
Texas hosts several of the largest and most productive wind farms globally. Roscoe Wind Farm (782 MW), Horse Hollow Wind Energy Center (736 MW), and Capricorn Ridge (663 MW) all exploit the flat, windy terrain of West Texas. Texas also has a deregulated electricity market and invested heavily in transmission lines connecting remote wind-rich areas to population centers like Dallas and Houston. That transmission investment solved a problem that has sunk wind projects elsewhere: generating cheap power in a place where nobody can use it.
Shepherds Flat in Oregon, at 845 MW, is another standout. It was one of the largest wind farms in the world when completed in 2012 and secured federal loan guarantees and tax credits that significantly improved its financial returns during the critical early years of operation.
China’s Massive Gansu Wind Farm
The Gansu Wind Farm in northwestern China is the largest wind power complex in the world, consisting of multiple interconnected wind farms with a total installed capacity of nearly 8 gigawatts and plans to reach 20 GW. The project’s scale is staggering: roughly 7,000 turbines spread across desert terrain, with a total cost estimated at nearly $18 billion, which works out to about $0.90 per installed watt. That per-watt cost is remarkably low and reflects the economies of scale that come with building at this size.
But Gansu also illustrates how raw scale doesn’t guarantee economic success. The wind farm has historically suffered from curtailment, meaning turbines are sometimes shut off because the local grid can’t absorb all the power they produce. The facility sits in a remote desert region far from China’s coastal population centers, and transmission infrastructure hasn’t always kept pace with generation capacity. When turbines spin but their electricity has nowhere to go, the economics deteriorate quickly. China has invested heavily in ultra-high-voltage transmission lines to address this, and curtailment rates have improved, but Gansu remains a cautionary example of how location relative to demand matters as much as location relative to wind.
Offshore Wind: Higher Cost, Higher Stakes
Offshore wind farms cost significantly more to build than onshore projects, but they access stronger, more consistent winds. The economics have been volatile in recent years. Several high-profile U.S. offshore projects were cancelled or renegotiated in 2023 and 2024 as rising interest rates and supply chain costs eroded the financial assumptions developers had locked in years earlier.
South Fork Wind, the first commercial-scale offshore wind farm in the United States at 132 MW, began delivering power to New York in late 2023 and was fully commissioned in March 2024. It’s a relatively small project, but it represents a proof of concept for the U.S. offshore market. In Europe, offshore wind is more established. The Hornsea projects off the coast of England (with Hornsea 2 alone at 1.3 GW) and Denmark’s extensive offshore portfolio have demonstrated that offshore wind can be economically viable at scale, particularly when governments provide stable regulatory frameworks and guaranteed pricing through contracts for difference.
The projects that have succeeded offshore tend to share two features: they locked in favorable contract prices before costs spiked, and they’re located in relatively shallow waters close to major demand centers, keeping both construction and transmission costs manageable.
Why Financing Conditions Matter So Much
Wind farms are capital-intensive. Nearly all the cost is upfront (turbines, foundations, grid connections), while revenue trickles in over 20 to 30 years. That makes wind projects unusually sensitive to interest rates. When borrowing costs rise, the same physical wind farm that would have been profitable at low rates can become marginal or unviable. This is a major reason several offshore wind contracts in the northeastern U.S. were abandoned in 2023 and 2024: developers had bid aggressively when rates were near zero, and the math no longer worked at 5% or higher.
Tax credits and subsidies also play an outsized role. The U.S. Production Tax Credit, which pays wind operators per kilowatt-hour generated, has been a key driver of profitability for nearly every successful American wind farm. Projects that secure long-term power purchase agreements with utilities or corporations further insulate themselves from market price swings, locking in predictable revenue for a decade or more.
Repowering Older Wind Farms
Some of the best economic returns in wind energy come not from new construction but from upgrading existing sites. After 20 to 25 years of operation, wind farms become strong candidates for “repowering,” replacing aging turbines with modern ones that are taller, more efficient, and capable of capturing more energy from the same wind resource.
Research from the National Renewable Energy Laboratory found that full repowering (replacing entire turbines) costs about 5% less than building an equivalent new wind farm from scratch, because developers can reuse existing roads, electrical infrastructure, and grid connections. Partial repowering, where only the drivetrain and rotor blades are swapped out, saves about 15% on costs but captures only about half the energy production gains of a full overhaul. Both approaches tend to become financially attractive after 20 to 25 years of service compared to building on a new site nearby.
This means many of the early-2000s wind farms in Texas, California, and the Midwest are now entering a sweet spot where reinvestment can dramatically improve their economics. A site with proven wind resources, existing permits, and grid access is a lower-risk investment than a greenfield project, which helps explain why repowering activity has accelerated in recent years.
Common Traits of Successful Projects
- Prime wind resources: Capacity factors above 35% dramatically improve returns. The best sites are in the Great Plains, coastal areas, and mountain passes.
- Grid access: Proximity to transmission lines and demand centers avoids the curtailment problems that have plagued projects like Gansu.
- Locked-in revenue: Long-term power purchase agreements or government-backed pricing contracts protect against electricity price volatility.
- Low financing costs: Projects financed during low-interest-rate periods, or those backed by government loan guarantees, have a structural advantage.
- Policy support: Tax credits, renewable energy mandates, and streamlined permitting all reduce financial risk for developers and investors.
The wind farms that check most or all of these boxes, like the large Texas installations, Alta Wind in California, and established European offshore projects, are the ones that have consistently delivered strong financial returns. Projects that miss on even one factor, particularly grid access or financing terms, can struggle despite having excellent wind resources.