Company lists · Data refreshed September 2026

Top 25 Clean energy technology firms based in the United States

Name: Clean energy technology firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 4,944 companies tracked

RevenueBase identified 4,944 company matches for clean energy technology firms associated with the United States as of September 2026 and tracks 177,613 professional contacts across them, including 65,609 with verified work emails. New York is the largest hub.

This list covers company matches for clean energy technology firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 16, 2026 How this list was built

4,944Companies

177,613Contacts tracked

65,609Verified emails

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The 25 largest clean energy technology firms based in the United States

Ranked by team size

Top 25 of 4,944 company matches for clean energy technology firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 16, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	GE Vernova	Exact match	Boston, MA, United StatesHQ recorded Sep 16, 2026	10001+	29,528 contacts →
	Exact match “GE Vernova is a purpose-built energy technology company on a mission to electrify to thrive and decarbonize the world.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
2	TRANE	Exact match	Davidson, NC, United StatesHQ recorded Sep 16, 2026	10001+	10,272 contacts →
	Exact match “Trane is the building technology and energy solutions leader who deploys a depth and breadth of expertise, backgrounds, and perspectives to innovate new technologies and…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
3	Sunrun	Exact match	San Francisco, CA, United StatesHQ recorded Sep 16, 2026	10001+	7,974 contacts →
	Exact match “Life runs on clean energy.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
4	Generac	Exact match	Waukesha, WI, United StatesHQ recorded Sep 16, 2026	5,001-10,000	3,797 contacts →
	Exact match “Generac is the total energy solutions company powering a smarter world.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
5	Enphase Energy	Exact match	Fremont, CA, United StatesHQ recorded Sep 16, 2026	1,001-5,000	3,130 contacts →
	Exact match “Enphase Energy is a global energy technology company and the world’s leading supplier of microinverter-based solar and battery systems.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
6	FTI	Exact match	Menasha, WI, United StatesHQ recorded Sep 16, 2026	1,001-5,000	2,741 contacts →
	Exact match “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
7	Sunpower Corporation	Exact match	Richmond, CA, United StatesHQ recorded Sep 16, 2026	1,001-5,000	2,675 contacts →
	Exact match “We believe clean energy and backup storage should be accessible to everybody.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
8	Invenergy	Exact match	Chicago, IL, United StatesHQ recorded Sep 16, 2026	1,001-5,000	2,408 contacts →
	Exact match “Invenergy is North America’s largest privately held developer, owner, and operator of innovative, reliable power infrastructure.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
9	Fluence	Exact match	Arlington, VA, United StatesHQ recorded Sep 16, 2026	1,001-5,000	1,863 contacts →
	Exact match “To achieve our mission, we design, deploy, and operate the world’s most advanced modular energy storage products, comprehensive lifecycle services, and AI-enabled asset management…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
10	Mitsubishi Power Americas	Exact match	Lake Mary, FL, United StatesHQ recorded Sep 16, 2026	1,001-5,000	1,859 contacts →
	Exact match “Mitsubishi Power Americas is creating a future that works for people and the planet through innovative power generation technology and solutions.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
11	Trinity Solar	Exact match	Wall Township, NJ, United StatesHQ recorded Sep 16, 2026	1,001-5,000	1,794 contacts →
	Exact match “Trinity Solar is one of the largest privately held residential solar companies in the nation.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
12	Solarcity	Exact match	San Mateo, CA, United StatesHQ recorded Sep 16, 2026	10001+	1,756 contacts →
	Exact match “SolarCity was acquired by Tesla in 2016 and is now Tesla Energy Operations, Inc.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
13	Rehlko	Exact match	Milwaukee, WI, United StatesHQ recorded Sep 16, 2026	5,001-10,000	1,709 contacts →
	Exact match “Rehlko is a global leader in energy resilience, delivering the solutions critical to sustain and improve life.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
14	Ameresco	Exact match	Framingham, MA, United StatesHQ recorded Sep 16, 2026	1,001-5,000	1,383 contacts →
	Exact match “Ameresco, Inc.(NYSE:AMRC) is a leading energy infrastructure solutions provider dedicated to helping customers reduce costs, enhance resilience, and decarbonize to net zero in the…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
15	Solv Energy	Exact match	San Diego, CA, United StatesHQ recorded Sep 16, 2026	1,001-5,000	1,286 contacts →
	Exact match “SOLV Energy is a renewable energy solutions provider for utility solar, energy storage, and high voltage projects in North America.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
16	Blue Raven Solar	Exact match	Orem, UT, United StatesHQ recorded Sep 16, 2026	1,001-5,000	1,168 contacts →
	Exact match “Blue Raven Solar, a SunPower Company, is a retailer of residential home solar systems.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
17	Goodleap	Exact match	Roseville, CA, United StatesHQ recorded Sep 16, 2026	501-1,000	1,143 contacts →
	Exact match “GoodLeap is a technology company delivering best-in-class financing and software products for sustainable solutions, from solar panels and batteries to energy-efficient HVAC, heat…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
18	Qcells North America	Exact match	Irvine, CA, United StatesHQ recorded Sep 16, 2026	501-1,000	954 contacts →
	Exact match “Qcells is a renowned complete energy solutions provider in solar cell and module, energy storage, downstream project business and energy retail.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
19	Wanzek Construction, Inc., A Mastec Company	Exact match	Fargo, ND, United StatesHQ recorded Sep 16, 2026	1,001-5,000	933 contacts →
	Exact match “Wanzek Construction, Inc, a MasTec Renewables company, is a leading general construction contractor and clean energy services company headquartered in Fargo, North Dakota.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
20	Recurrent Energy	Exact match	Austin, United StatesHQ recorded Sep 16, 2026	501-1,000	931 contacts →
	Exact match “Recurrent Energy, a subsidiary of Canadian Solar Inc, is one of the world's largest and most geographically diversified utility-scale solar and energy storage project development…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
21	ION Solar	Exact match	Provo, UT, United StatesHQ recorded Sep 16, 2026	501-1,000	912 contacts →
	Exact match “Ion Solar is a premium, full-service solar provider.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
22	d.light	Exact match	San Francisco, CA, United StatesHQ recorded Sep 16, 2026	501-1,000	908 contacts →
	Exact match “d.light is a global leader and pioneer in delivering affordable solar-powered solutions designed for the two billion people in the developing world without access to reliable…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
23	Sunnova Energy	Exact match	Houston, TX, United StatesHQ recorded Sep 16, 2026	501-1,000	906 contacts →
	Exact match “Sunnova Energy International Inc.(NYSE: NOVA) is an industry-leading energy services company focused on making clean energy more accessible, reliable, and affordable for…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
24	Clearway Energy Group	Exact match	San Francisco, CA, United StatesHQ recorded Sep 16, 2026	501-1,000	795 contacts →
	Exact match “Clearway Energy Group’s vision is a world powered by clean energy.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
25	Pattern Energy	Exact match	San Francisco, CA, United StatesHQ recorded Sep 16, 2026	501-1,000	755 contacts →
	Exact match “Pattern Energy is one of the world’s largest privately-owned developers and operators of wind, solar, transmission, and energy storage projects.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “clean energy technology firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 4,944 clean energy technology firms based in the United States

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Clean energy technology firms based in the United States at a glance

As of Sep 16, 2026

36.9%Verified-email coverage

35.9Average contacts per company

11-50Median size (employees)

3.1%Largest-city concentration · New York

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

2,035

11-50

1,918

51-200

670

201-500

157

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 4,944 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “clean energy technology firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 65,609 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 16, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Clean energy technology firms by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “clean energy technology firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many clean energy technology firms are there based in the United States?

RevenueBase identified 4,944 company matches for clean energy technology firms associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

GE Vernova tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most clean energy technology firms?

New York leads with 151 company records, followed by Houston (127) and Austin (91).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 65,609 professional contacts with verified work emails tracked across these 4,944 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.