Largest Renewable Energy Companies in the US 2026

By early 2026, US utility‑scale wind, solar, and battery storage reached 330 GW of operating capacity. Another 150 GW is moving through construction, and annual clean‑energy investment stays above $80 billion. This ranking identifies the biggest renewable energy companies in the US—measured by installed capacity plus projects already under construction—and explains how they built their portfolios.

Methodology: How We Ranked the Biggest Renewable Energy Companies in the US

Our list focuses on the total US renewable capacity a developer owns and is actively building. We count only assets inside the United States, using nameplate megawatts (MW) or gigawatts (GW) that are either operational or officially under construction as of Q1 2026. Every ranked company reports these figures in public filings; we do not proxy market capitalization or revenue.

What gets counted—and what does not

We include utility‑scale solar photovoltaic, onshore wind, offshore wind, and battery energy storage systems (BESS). Behind‑the‑meter assets are included only when they represent a meaningful share of a developer’s overall portfolio. Projects that are still in the pipeline but have not started construction are excluded, as are thermal generation, transmission lines, and non‑renewable assets.

Where the numbers come from

• Annual reports and investor presentations
• FERC Form 1 and Form 3 filings
• EIA‑860 generator data
• Official company press releases

Where a parent entity controls a separate North American subsidiary, we consolidate the capacity under the parent (e.g., Iberdrola’s US portfolio is held through Avangrid). The ranking is refreshed annually to capture new commissioning, acquisitions, and repowering completions.

The 10 Largest Renewable Energy Companies in the US 2026

Before the detailed profiles, the table below gives a quick side‑by‑side look at the top 10 and their resource mix.

Rank	Company	Total US Capacity (GW)	Onshore Wind (GW)	Solar + Storage (GW)	Other / Hydro (GW)
1	NextEra Energy	34	23	11	–
2	Invenergy	25	16	9	–
3	Iberdrola (via Avangrid)	10	8.3	1.5 (solar + BESS)	0.2 (offshore wind)
4	Duke Energy Renewables	8	5.5	2.3 solar + 0.4 BESS	–
5	EDP Renewables North America	7.5	6.2	1.3 (solar + BESS)	–
6	Enel Green Power NA	7	5.0	2.4 (solar + BESS)	–
7	Ørsted North America	5.2	2.5	0.3 (solar)	2.4 (offshore wind)
8	Clearway Energy Group	4.7	1.2	3.5 (solar + BESS)	–
9	AES Clean Energy	4.2	2.8	1.4 (solar + BESS)	–
10	Brookfield Renewable	3.9	1.1	0.5 solar	2.3 (hydro)

Numbers are rounded to the nearest decimal; BESS figures are embedded in the solar + storage column where not listed separately.

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1. NextEra Energy (34 GW)

NextEra Energy operates more than 34 GW of renewable capacity in the US—23 GW of onshore wind and over 11 GW of utility‑scale solar and battery storage. Its Florida utility, FPL, has added over 6 GW of solar since 2019. The competitive‑generation arm, NextEra Energy Resources, runs the nation’s largest behind‑the‑meter battery storage site. A power purchase agreement book topping 15 GW provides long‑term revenue visibility.

Another 20 GW of new renewables and storage is already under construction. That pipeline extends NextEra’s lead well beyond the rest of the field and reinforces its position as the biggest renewable energy operator in the country.

2. Invenergy (25 GW)

Chicago‑based Invenergy is the largest privately held US renewable developer. Its domestic portfolio stands at roughly 25 GW—more than 16 GW of onshore wind and a 9 GW solar‑and‑storage fleet. The company handles engineering, procurement, and construction (EPC) as well as long‑term asset management entirely in‑house, a vertically integrated model that is rare at this scale.

Invenergy has repowered turbines at over a dozen legacy wind farms, lifting their output. Its US project pipeline exceeds 20 GW across 20 states, with heavy concentration in the Midwest and Texas, where wind resources and land availability align.

3. Iberdrola (10 GW, via Avangrid)

Iberdrola channels its US renewable assets through Avangrid, which holds roughly 10 GW of installed capacity. Onshore wind accounts for 8.3 GW, utility‑scale solar contributes 1.5 GW, and a growing offshore wind footprint includes the Vineyard Wind joint venture. Avangrid also operates 0.3 GW of battery storage, with several hundred megawatts more under construction.

Corporate and municipal offtakers under long‑term PPAs provide stable cash flows. Iberdrola intends to more than double its US renewable capacity by 2030, leaning on offshore wind leases off Massachusetts and New York.

4. Duke Energy Renewables (8 GW)

A subsidiary of Duke Energy Corporation, Duke Energy Renewables owns and operates more than 8 GW of clean generation. The portfolio breaks down into 5.5 GW of onshore wind, 2.3 GW of utility‑scale solar, and 0.4 GW of battery storage. The company has repowered wind farms in the Great Plains and acquired fully permitted solar projects in the Southeast.

Duke markets large‑scale PPAs to commercial and industrial customers, often pairing solar with BESS to deliver firm, dispatchable power. An additional 2 GW is under construction, with an emphasis on hybrid solar‑plus‑storage configurations.

5. EDP Renewables North America (7.5 GW)

Headquartered in Houston, EDP Renewables North America has assembled 7.5 GW of US capacity. Onshore wind is the anchor at 6.2 GW, while solar contributes 1.1 GW and BESS adds 0.2 GW. Major wind clusters operate in Texas, Oklahoma, and Illinois; repowering older turbines has helped lift overall capacity factors.

EDPR NA is also expanding distributed‑generation solar for corporate clients and holds a pipeline of more than 5 GW, with an increasing share allocated to hybrid solar‑plus‑storage sites in the Southwest.

6. Enel Green Power North America (7 GW)

Enel Green Power North America manages about 7 GW in the US—roughly 5 GW of wind and 2 GW of solar. It is a prominent operator in Texas and the Great Plains, where it has built some of the country’s largest onshore wind farms. Battery storage has grown to 0.4 GW in operation, and another 1 GW is under construction.

Enel frequently co‑locates BESS at existing renewable plants to strengthen grid services and increase the value of its power purchase agreements.

7. Ørsted North America (5.2 GW)

Ørsted transformed from a Danish oil and gas company into a pure‑play renewables developer. In the US it holds 5.2 GW of capacity. Offshore wind accounts for 2.4 GW, including the 132 MW Block Island Wind Farm—the first US offshore project—and the 1.2 GW South Fork, Revolution Wind, and Sunrise Wind projects. Onshore, the company acquired 2.5 GW of wind and solar through the Lincoln Clean Energy platform.

Total US capacity under construction exceeds 3 GW, anchored by the 2.5 GW Ocean Wind projects off New Jersey. That pipeline makes Ørsted the largest US offshore wind developer.

8. Clearway Energy Group (4.7 GW)

San Francisco’s Clearway Energy Group holds a diversified 4.7 GW fleet concentrated in California, Arizona, and Texas. Utility‑scale solar accounts for 3.2 GW, wind 1.2 GW, and battery storage 0.3 GW. Its near‑term growth focuses on repowering and hybridizing existing sites.

A 1.5 GW pipeline includes several large solar‑plus‑storage projects designed for corporate buyers under long‑term PPAs. Clearway is one of the few publicly listed pure‑play renewable yieldcos in the US.

9. AES Clean Energy (4.2 GW)

AES Clean Energy, the US development arm of AES Corporation, operates 4.2 GW of renewable capacity. Onshore wind makes up 2.8 GW, solar contributes 1.1 GW, and BESS installations total 0.3 GW. The company was an early mover in pairing utility‑scale solar with large storage—most notably at the Alamitos and Lancaster sites in California.

AES is active in the corporate PPA market and has over 3 GW under construction, heavily weighted toward MISO and CAISO territories.

10. Brookfield Renewable (3.9 GW)

Brookfield Renewable, the listed power affiliate of Brookfield Asset Management, manages a 3.9 GW US operating portfolio. Legacy hydroelectric plants in New York and the Pacific Northwest supply 2.3 GW, complemented by 1.1 GW of onshore wind and 0.5 GW of utility‑scale solar. The strategy favors long‑life contracted assets and brownfield revitalization.

A 2 GW development pipeline is split between wind repowering and new solar‑storage projects.

What the 2026 Ranking Shows About the US Clean Energy Market

A handful of patterns emerge from the top 10 that matter for anyone tracking the industry, negotiating a PPA, or modeling future supply.

• Wind still dominates, but solar and storage are closing the gap. Of the top 10, four companies have more than half their capacity in wind, but the pipeline heavily tilts toward solar‑plus‑storage hybrids. If you are comparing offtake offers, a wind‑only PPA and a solar‑plus‑BESS PPA can carry very different risk and delivery profiles.
• Battery storage is no longer optional. Eight of the top 10 are building or operating BESS at scale. Developers now routinely colocate storage with solar to shape the generation curve and capture ancillary service revenue. A common mistake is to evaluate a project solely on its solar capacity factor, ignoring the firming value storage provides.
• The corporate PPA engine supports the build‑out. Over two‑thirds of these developers market PPAs to commercial and industrial buyers. When a developer’s contract book is heavily concentrated with a few offtakers, credit risk can shift—check whether the ranked portfolio’s revenue is spread across multiple counterparties.
• Geography shapes ambition. Texas and the Great Plains host the heaviest wind deployments, while California, Arizona, and the Southeast see more solar‑heavy builds. Offshore wind is currently clustered in the Northeast. If you are siting a data center or factory that needs hourly-matched clean power, map the local resource first; a developer’s national ranking doesn’t guarantee they have the right asset in your target region.
• Repowering extends asset life and raises output. Several top players—Invenergy, Duke, EDPR NA—are actively repowering legacy turbines. Repowering can increase a wind farm’s capacity factor by 10–20% with a smaller capital outlay than a greenfield project, so it often shows up quickly in a developer’s growth pipeline.

If you are starting a diligence process, first identify whether your priority is lowest cost per MWh, firm delivery shape, or counterparty credit strength. The biggest renewable energy companies in the US can offer different strengths across those dimensions.

Frequently Asked Questions

Which country is 100% clean energy?
No country is entirely 100% clean across all energy uses, but several generate almost all of their electricity from renewables. Iceland and Paraguay, for example, run on nearly 100% hydro and geothermal power for their grids. In the US, no state has reached 100% clean electricity yet, though Vermont and Washington generate over 95% from renewable sources annually.

Who are the biggest players in renewable energy?
Globally, NextEra Energy, Iberdrola, and Enel lead in installed renewable capacity. In the US, NextEra Energy is the largest operator of wind and solar, followed by Invenergy and Avangrid. The full ranking above gives the 2026 US‑specific picture.

What is the best renewable energy stock to buy?
This article does not offer investment advice. Many of the companies we rank are publicly traded and are regularly analyzed for their contracted revenue, growth pipelines, and capital structures. The appropriate choice depends on your own financial goals and risk tolerance.

What is the cleanest energy?
Based on lifecycle greenhouse gas emissions, wind and solar photovoltaic are the cleanest energy sources. They produce virtually no operational emissions, and when paired with battery storage, they can provide increasingly reliable low‑carbon generation that displaces fossil fuels around the clock.

How is US renewable energy capacity expected to grow?
US renewable capacity is projected to surpass 500 GW by 2028, driven by large‑scale solar additions, the first wave of utility‑scale offshore wind, and a doubling of battery storage capacity. The companies listed here are the primary developers behind that expansion.

Methodology Notes and Data Sources

• Company capacity data comes from annual reports, FERC Form 1 and Form 3 filings, EIA‑860 generator data, and official press releases.
• We include only US‑based operating assets and capacity officially under construction as of Q1 2026.
• All figures are nameplate megawatts or gigawatts.
• For parent companies with multiple subsidiaries, we consolidate capacity under the controlling entity to avoid double‑counting.
• The list is refreshed annually to reflect new commissioning, acquisitions, and major project status changes.