Largest Renewable Energy Companies in the United States 2026

By mid‑2026 the United States is humming with more than 400 GW of operating onshore wind, utility‑scale solar, and battery energy storage systems. Offshore wind farms have begun delivering honest‑to‑goodness gigawatt‑scale additions to the grid. The Inflation Reduction Act and extended investment tax credits fuelled a breakneck build‑out, drawing a growing cast of independent power producers, regulated utilities, and infrastructure funds deeper into the sector. Here we profile the 10 largest renewable energy companies United States, ranked by owned and operated megawatts as of 30 June 2026.

1. NextEra Energy

Capacity Snapshot

More than 30 GW of US wind and solar sit inside NextEra Energy Resources, making the company the planet’s largest renewable generator. Florida Power & Light, its regulated utility, tacks on another 4 GW of utility‑scale solar and a thickening stack of battery storage projects. Recent milestones include a 690 MW solar‑plus‑storage plant in Nevada, a 409 MW BESS in California, and large‑scale repowering programmes across older wind farms. Net yearly generation from the US wind and solar fleet routinely surpasses 150 million MWh.

Offtake Realities When Comparing Capacity

Megawatt totals can mislead buyers and analysts. A PPA from NextEra’s competitive arm, NextEra Energy Resources, often carries different risk than a rate‑based contract with Florida Power & Light. The regulated utility’s returns are set by state commissions and are largely insulated from wholesale price swings, while merchant‑exposed projects from the competitive side depend on hub prices and congestion patterns. When a company evaluates a PPA proposal, treating all NextEra capacity as equal misses this split—it can affect both price certainty and the value of any unused renewable attributes.

2. Brookfield Renewable

A Hydro‑Heavy Foundation

Brookfield Renewable’s US portfolio rests on roughly 12 GW, much of it hydroelectric generation and pumped storage across New England and the Mid‑Atlantic. Onshore wind and utility‑scale solar sit alongside, all operated under long‑term PPAs. Modernising those legacy hydro stations has lifted capacity factors, while recent solar acquisitions spread the footprint into the South‑West.

Revenue Streams Beyond Pure Energy Sales

Pumped storage assets do not simply sell megawatt‑hours. In markets such as PJM, they earn a significant share of revenue from capacity payments and ancillary services like frequency regulation. An investor comparing portfolios by megawatts alone may overlook that roughly‑similar capacity numbers can hide entirely different revenue profiles. A drop in capacity market clearing prices can trim returns more than a small dip in energy margins, a nuance that raw capacity rankings do not capture.

3. Avangrid

Wind Dominance Meets Offshore Ambition

Avangrid, Iberdrola’s US arm, runs more than 8 GW of renewables. Onshore wind accounts for 7.2 GW, grid‑scale solar contributes 1 GW, and the 800 MW Vineyard Wind offshore project off Massachusetts—online since 2024—marks a decisive push into sea‑based generation. Repowering of older onshore assets continues, and the project pipeline extends to additional offshore lease areas and solar‑plus‑storage developments.

Contract Structures That Distort Headline Figures

Vineyard Wind’s output is sold under long‑term offshore renewable energy credit (OREC) contracts that decouple revenue from wholesale market volatility. That structural shield means the offshore gigawatts in Avangrid’s tally bear little resemblance to an onshore wind farm that must weather merchant exposure after an initial PPA expires. When ranking large energy companies United States, a pure megawatt count ignores these contractual differences, making side‑by‑side comparisons riskier than they appear.

4. Ørsted US

From First‑Mover to Fleet Builder

Ørsted’s US footing rests on 3 GW of installed and under‑construction offshore wind, onshore wind, and solar PV. South Fork Wind (132 MW) was the first commercial‑scale offshore wind farm in the country; Revolution Wind (704 MW) followed. Federal lease areas could unlock several additional gigawatts. Onshore, wind and solar assets across the Plains and Texas are secured by PPAs with corporate and utility offtakers.

The Green Hydrogen Overhang

A green hydrogen pilot linked to the offshore fleet is advancing, but its commercial model remains unproven. Developers and investors benchmarking US offshore players often treat the hydrogen angle as a call‑option on future policy support, not as near‑term contracted revenue. If you are comparing Ørsted’s capacity against a purely electric‑generation portfolio, factor in that hydrogen‑adjacent projects may eventually decouple from pure megawatt‑hour metrics entirely.

5. Duke Energy Renewables

Utility Muscle, Unregulated Arm

Duke Energy Renewables, the unregulated subsidiary of Duke Energy, holds roughly 5 GW of utility‑scale solar, onshore wind, and battery storage across 22 states. The utility parent is layering solar and storage into its own rate base, while the renewables arm pursues asset acquisitions and greenfield projects that support the company’s decarbonisation target. Recent completions include 250 MW solar farms in the South‑East and 100 MW of co‑located battery capacity.

Common Oversight When Sourcing from Duke

A frequent mistake is to assume Duke Energy Renewables always shares the credit profile of the regulated parent. The subsidiary sits outside the rate‑base ring‑fence and relies on its own contracted revenue streams and project‑level financing. For a corporate buyer conducting a PPA credit review, the offtaker’s investment‑grade status can differ materially between a Duke‑backed project and a direct regulated‑utility arrangement, so due‑diligence checklists should treat them separately.

6. Invenergy

A Development Juggernaut

Invenergy has stacked more than 15 GW of wind, solar, and energy storage projects across the US. Its operational fleet links the Grain Belt Express transmission line to massive solar‑and‑storage blocks, spans several 300 MW wind farms, and includes a growing standalone BESS fleet. A construction pipeline exceeding 10 GW is under PPA negotiation with utilities and large corporate buyers.

Interconnection Queue Realities

Vast pipeline numbers can inflate expectations. Not every project in Invenergy’s queue will survive the multi‑year interconnection process; some will face cost reallocation or protracted permitting delays. When a buyer evaluates a PPA from a developer with a double‑digit‑gigawatt pipeline, it helps to ask not just about total planned capacity but about which projects have completed their system impact study and secured an interconnection agreement. That filters the backlog from the feasible.

7. Clearway Energy Group

The Repowering Playbook

Seven gigawatts. That is Clearway Energy Group’s contracted base, dominated by utility‑scale solar and onshore wind with a sliver of dual‑fuel natural gas capacity. Repowering is a signature move: older turbines at brownfield sites are swapped for higher‑efficiency models, lifting capacity factors without chasing new interconnection. Long‑term contracts with investment‑grade off‑takers provide revenue visibility, and asset optimisation programmes maximise availability and extend operational life.

Why Contract Length Matters More Than Megawatts

A portfolio anchored by repowered projects often carries shorter‑remaining PPA tenors than greenfield installations. An analyst sizing up Clearway should weigh the weighted average contract life against the headline capacity figure. A 7 GW portfolio with an average remaining PPA life of 10 years behaves very differently in a refinancing scenario than one loaded with fresh 20‑year agreements, even if the megawatt count is identical.

8. EDF Renewables North America

A Broad Spectrum of Assets

Ten gigawatts. That is the combined operating and under‑construction tally at EDF Renewables North America, spanning wind, solar photovoltaic, and battery storage. The portfolio ranges from community solar installations and behind‑the‑meter distributed generation to large utility‑scale farms. O&M services run across its own assets and third‑party fleets, while the development pipeline leans heavily into solar‑plus‑storage configurations in the South‑West and South‑East.

The Distributed Generation Distinction

Behind‑the‑meter projects and community solar gardens count toward the 10 GW figure but deliver generation patterns that differ sharply from a central‑station PV farm. A corporate buyer assessing a PPA with EDFR should clarify whether the offtake is linked to a single large facility or aggregated across a portfolio of smaller, geospatially dispersed installations. The latter can offer a more stable generation profile but may carry higher offtake‑management complexity.

9. AES Corporation (Renewables Arm)

Storage‑Led Credentials

AES has assembled a US renewable portfolio of more than 7 GW of wind, grid‑scale solar, and battery storage. The Alamitos energy storage centre in California—400 MWh of lithium‑ion capacity—still stands among the nation’s largest BESS installations. New solar‑plus‑storage hybrids are being layered in, backed by energy management systems that serve utility customers and steer the generation mix toward net zero.

A standalone battery installation can provide four‑hour duration and meet resource‑adequacy requirements, but that 100 MW nameplate cannot replace 100 MW of thermal generation over a full evening peak. When comparing AES’s storage capacity to a pure generation company, it helps to note that the Alamitos centre and similar systems earn revenue from capacity markets and ancillary services, not from full‑day energy delivery. Ranking metrics that treat battery megawatts as equivalent to thermal or wind capacity overstate their energy‑replacement capability.

10. Enel Green Power North America

A Technology Mix That Defies Simplification

Enel Green Power North America’s 10 GW fleet spans onshore wind, utility‑scale solar photovoltaic, and a distinctive geothermal wedge. Several hybrid solar‑battery plants are already online, and new gigawatt‑scale construction commenced during 2025–2026. Long‑term PPAs with corporate off‑takers and utilities underpin the operating fleet, while the development pipeline continues to diversify across all three technologies.

Geothermal’s Hidden Edge in Capacity Rankings

Geothermal plants produce baseload‑style generation with capacity factors well above typical wind and solar. A megawatt of geothermal capacity in Enel’s portfolio therefore delivers many more megawatt‑hours each year than a megawatt of onshore wind. For a true generation‑weighted comparison, the geothermal wedge would punch above its capacity share—something the strict megawatt ranking downplays. Investors and researchers who need a production‑facing view should supplement the headline figure with actual generation data from the company’s investor presentations.

Ranking Methodology

We rank by owned and operated megawatts on US soil—full stop. The asset classes counted include onshore and offshore wind, utility‑scale solar, hydroelectric, geothermal, and battery energy storage systems co‑located with renewable generation. Pumped storage hydro is treated as renewable capacity for consistency; standalone batteries are excluded unless they sit alongside a renewable plant. Capacities are sourced from FERC filings, corporate sustainability reports, official press releases, and annual investor presentations. Only assets fully in operation or mechanically complete are included—development pipelines do not inflate the numbers. The cutoff is 30 June 2026, and the list is refreshed each year. Small methodology adjustments—how we classify pumped storage, or whether generation‑weighting would shift the order—are revisited during each update, and rankings can move as a result. This ranking of energy companies United States makes it possible to compare scale, but readers should always layer on capacity factors and contract structures before drawing conclusions about financial strength.

At a Glance: The 10 Largest Renewable Energy Companies United States

Company	Total US Capacity (GW)	Primary Technology Mix	Key Differentiator
NextEra Energy	34+ (incl. FPL)	Onshore wind, solar, battery storage	World’s largest renewable generator; regulated utility complement
Brookfield Renewable	~12	Hydroelectric & pumped storage, wind, solar	Hydro backbone with capacity market revenue streams
Avangrid	>8	Onshore wind, solar, offshore wind	Vineyard Wind project; Iberdrola backing
Ørsted US	3+	Offshore wind, onshore wind, solar PV	First commercial‑scale US offshore wind farm
Duke Energy Renewables	5	Solar, onshore wind, battery storage	Unregulated arm of large utility; decarbonisation driver
Invenergy	>15	Wind, solar, BESS, transmission	Massive development pipeline; Grain Belt Express
Clearway Energy Group	7	Solar, onshore wind, some dual‑fuel gas	Repowering specialist; long‑term contracted cash flows
EDF Renewables North America	10	Wind, solar, battery storage, distributed generation	Broad range from utility‑scale to behind‑the‑meter
AES Corporation (Renewables)	>7	Wind, solar, battery storage	Alamitos BESS landmark; energy management systems
Enel Green Power North America	10	Onshore wind, solar PV, geothermal	Geothermal wedge; hybrid solar‑battery plants

Frequently Asked Questions

What are the top 10 energy companies in the US?
The 10 largest renewable energy companies in the US as of mid‑2026 are NextEra Energy, Brookfield Renewable, Avangrid, Ørsted US, Duke Energy Renewables, Invenergy, Clearway Energy Group, EDF Renewables North America, AES Corporation, and Enel Green Power North America. Full profiles and a summary table appear above, all ranked by owned and operated capacity on US soil. Companies that primarily burn fossil fuels—even if they hold minority renewable stakes—are excluded from this list.

Which US renewable energy company has the largest capacity?
NextEra Energy leads with more than 30 GW of owned wind and solar capacity in the United States, making it the world’s largest renewable energy generator. When including its regulated utility’s solar and storage assets, the total exceeds 34 GW.

How is renewable energy company size measured in this ranking?
We rank by installed megawatts owned and operated within the US, not by market capitalisation, revenue, or assets under management. This counts physical infrastructure directly, though it does not reflect capacity factors or actual generation output; a generation‑weighted ranking would reshuffle the list, often favouring companies with geothermal, hydroelectric, or high‑capacity‑factor wind assets.

Is the list updated annually?
Yes, we refresh the ranking each year using the latest disclosed figures, making the list freely available to investors and market researchers. Adjustments to methodology—such as how we treat pumped storage or whether to introduce a generation‑weighted view—are evaluated with each update, so positions can shift.