Company lists · Data refreshed September 2026

Top 25 Clean energy contractors worldwide

Name: Clean energy contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 48,462 companies tracked

RevenueBase identified 48,462 company matches for clean energy contractors worldwide as of September 2026 and tracks 779,089 professional contacts across them, including 209,599 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for clean energy contractors worldwide, 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 21, 2026. Country and city lists for clean energy contractors follow the table.

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 21, 2026 How this list was built

48,462Companies

779,089Contacts tracked

209,599Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest clean energy contractors worldwide

Ranked by team size

Top 25 of 48,462 company matches for clean energy contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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	Siemens Energy	Exact match	Munich, GermanyHQ recorded Sep 21, 2026	10001+	46,587 contacts →
	Exact match “Siemens Energy is one of the world’s leading energy technology companies.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	Vestas	Exact match	Aarhus, DenmarkHQ recorded Sep 21, 2026	10001+	27,085 contacts →
	Exact match “Vestas is the energy industry’s global partner on sustainable energy solutions.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	Siemens Gamesa	Exact match	Zamudio, SpainHQ recorded Sep 21, 2026	10001+	18,693 contacts →
	Exact match “Siemens Gamesa is a global technology leader in the renewable energy industry - specifically in the development, manufacturing, installation and maintenance of wind turbines.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Dalkia	Exact match	Saint-andré-lez-lille, FranceHQ recorded Sep 21, 2026	10001+	8,427 contacts →
	Exact match “Dalkia : ensemble, relevons le défi climatique!” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Sunrun	Exact match	San Francisco, CA, United StatesHQ recorded Sep 21, 2026	10001+	7,974 contacts →
	Exact match “Life runs on clean energy.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Ørsted	Exact match	Fredericia, United StatesHQ recorded Sep 21, 2026	5,001-10,000	7,538 contacts →
	Exact match “Ørsted is the global leader in offshore wind power and is one of the largest renewable energy companies in the world.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	Suzlon Group	Exact match	Pune, IndiaHQ recorded Sep 21, 2026	5,001-10,000	7,141 contacts →
	Exact match “Suzlon is a global wind-first, full-stack clean energy solutions conglomerate with businesses spanning RE Technology (Wind, Solar, Storage), RE Development Company, RE Asset…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	EDP	Exact match	Lisbon, PortugalHQ recorded Sep 21, 2026	10001+	6,435 contacts →
	Exact match “Our story began 50 years ago.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	Alfanar	Exact match	Riyadh, Saudi ArabiaHQ recorded Sep 21, 2026	10001+	6,383 contacts →
	Exact match “alfanar builds efficient energy systems & solutions of the present and sets up infrastructures for a brighter future.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Enel Green Power	Exact match	Roma, ItalyHQ recorded Sep 21, 2026	5,001-10,000	5,251 contacts →
	Exact match “We are the Enel Group company dedicated to the development and management of renewable energy generation worldwide.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	RENEW	Exact match	Gurugram, IndiaHQ recorded Sep 21, 2026	1,001-5,000	4,340 contacts →
	Exact match “ReNew is a leading decarbonisation solutions provider and the first Indian clean energy company to list on Nasdaq (Nasdaq: RNW).” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Octopus Energy	Exact match	London, United KingdomHQ recorded Sep 21, 2026	1,001-5,000	3,989 contacts →
	Exact match “We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	KENTZ	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 21, 2026	10001+	3,987 contacts →
	Exact match “Following the acquisition of SNC-Lavalin's oil and gas division, Kentz has become a part of Kent.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Generac	Exact match	Waukesha, WI, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
15	RES	Exact match	Kings Langley, United KingdomHQ recorded Sep 21, 2026	1,001-5,000	3,721 contacts →
	Exact match “RES is the world’s largest independent renewable energy company, working across 24 countries and active in wind, solar, energy storage, green hydrogen, transmission, and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Luminous Power Technologies P LTD	Exact match	Gurgaon, IndiaHQ recorded Sep 21, 2026	5,001-10,000	3,713 contacts →
	Exact match “Powering Progress, Lighting Lives!” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	IDEX	Exact match	Boulogne-billancourt, FranceHQ recorded Sep 21, 2026	5,001-10,000	3,353 contacts →
	Exact match “Fondé en France en 1963, le groupe IDEX, fort de près de 6 500 collaborateurs, développe, conçoit, finance, construit et exploite des infrastructures énergétiques locales et…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	ENPAL	Exact match	Berlin, GermanyHQ recorded Sep 21, 2026	5,001-10,000	3,242 contacts →
	Exact match “Enpal is Europe's leading new energy company.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	Enphase Energy	Exact match	Fremont, CA, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
20	Solaredge Technologies	Exact match	Herzliya, IsraelHQ recorded Sep 21, 2026	1,001-5,000	3,091 contacts →
	Exact match “SolarEdge is a global leader in smart energy technology.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Adani Green Energy LTD	Exact match	United StatesHQ recorded Sep 21, 2026	1,001-5,000	3,017 contacts →
	Exact match “Adani Green Energy Limited (AGEL) is India’s largest renewable energy company playing a vital role in enabling the clean energy transition.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	FTI	Exact match	Menasha, WI, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
23	Sunpower Corporation	Exact match	Richmond, CA, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
24	Tata Power Renewable Energy Limited	Exact match	Mumbai, IndiaHQ recorded Sep 21, 2026	501-1,000	2,660 contacts →
	Exact match “Tata Power Renewable Energy Limited (TPREL) is one of India’s leading renewable energy companies, driving the transition towards a cleaner, more resilient and sustainable energy…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Greenko Group	Exact match	Hyderabad, IndiaHQ recorded Sep 21, 2026	1,001-5,000	2,578 contacts →
	Exact match “Greenko, is one of the World’s leading Energy Transition and Decarbonization solutions company, with an installed Renewable Energy capacity of ~7.5 GW across Wind, Solar and Hydro…” Recorded in the RevenueBase company graph · Sep 21, 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 contractors”. 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 48,462 clean energy contractors worldwide

See the full list, filter by size, metro and specialty, and access 209,599 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Clean energy contractors worldwide at a glance

As of Sep 21, 2026

26.9%Verified-email coverage

16.1Average contacts per company

11-50Median size (employees)

0.7%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

23,165

11-50

17,704

51-200

5,139

201-500

1,279

501-1,000

429

1,001-5,000

311

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for clean energy contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “clean energy contractors” 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. 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 209,599 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 21, 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 contractors by location

159 lists · largest first

Every Clean energy contractors list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many clean energy contractors are there worldwide?

RevenueBase identified 48,462 company matches for clean energy contractors worldwide 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?

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

Which country has the most clean energy contractors?

The United States leads with 5,773 companies, followed by India (3,571) and Brazil (3,397). Every clean energy contractors list by country and city is linked on this page.

Which city has the most clean energy contractors?

London leads with 346 company records, followed by Lahore (282) and Sao Paulo (277).

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 209,599 professional contacts with verified work emails tracked across these 48,462 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 21, 2026.

Ready to reach these companies? Verified emails and direct dials for all 48,462 clean energy contractors worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.