Company lists · Data refreshed September 2026

Top 25 On-site power generation companies worldwide

Name: On-site power generation companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 8,170 companies tracked

RevenueBase identified 8,170 on-site power generation companies worldwide as of September 2026 and tracks 129,378 professional contacts across them, including 30,202 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers on-site power generation companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026. Country and city lists for on-site power generation companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

8,170Companies

129,378Contacts tracked

30,202Verified emails

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The 25 largest on-site power generation companies worldwide

Ranked by team size

Top 25 of 8,170 on-site power generation companies worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to on-site power generation companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	KENTZ	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 20, 2026	10001+	3,987 contacts →
	Indirect evidence “Following the acquisition of SNC-Lavalin's oil and gas division, Kentz has become a part of Kent.” Source: RevenueBase Database · checked Sep 20, 2026
2	Fieldcore	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	10001+	3,700 contacts →
	Partial evidence “GE Vernova is a planned, purpose-built global energy company that includes Power, Wind, and Electrification businesses and is supported by its accelerator businesses of Advanced…” Source: RevenueBase Database · checked Sep 20, 2026
3	Bloom Energy	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,221 contacts →
	Indirect evidence “Bloom Energy empowers businesses and communities to responsibly take charge of their energy.” Source: RevenueBase Database · checked Sep 20, 2026
4	Calpine	Indirect evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,112 contacts →
	Indirect evidence “A business unit of Constellation (NASDAQ: CEG), Calpine Corporation is America’s largest generator of electricity from natural gas and geothermal resources with operations in…” Source: RevenueBase Database · checked Sep 20, 2026
5	Innio Group	Partial evidence	Munich, GermanyHQ checked Sep 20, 2026	1,001-5,000	2,111 contacts →
	Partial evidence “INNIO Group is a global distributed energy solutions provider that delivers reliable, flexible, transient, decentralized, modular and efficient power.” Source: RevenueBase Database · checked Sep 20, 2026
6	Kengen Kenya	Strong evidence	Nairobi, KenyaHQ checked Sep 20, 2026	1,001-5,000	1,998 contacts →
	Strong evidence “Kenya Electricity Generating Company PLC (KenGen) is the leading electric power generating company in East Africa.” Source: RevenueBase Database · checked Sep 20, 2026
7	Mitsubishi Power	Partial evidence	Chiyoda-ku, JapanHQ checked Sep 20, 2026	10001+	1,264 contacts →
	Partial evidence “Mitsubishi Power is a power solutions brand of Mitsubishi heavy industries, Ltd.(MHI).” Source: RevenueBase Database · checked Sep 20, 2026
8	Jubaili Bros	Partial evidence	Dubai, United Arab EmiratesHQ checked Sep 20, 2026	1,001-5,000	1,122 contacts →
	Partial evidence “Jubaili Bros is a global leader in providing data-enabled conventional and renewable off-grid power solutions.” Source: RevenueBase Database · checked Sep 20, 2026
9	Sudhir Power LTD	Partial evidence	Gurugram, IndiaHQ checked Sep 20, 2026	1,001-5,000	1,036 contacts →
	Partial evidence “Sudhir Power Limited, established in 1973, is a leader in Diesel Gensets, Transformers, PSS, HT & LT panels, and Equipment rental services.” Source: RevenueBase Database · checked Sep 20, 2026
10	Stemac	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 20, 2026	1,001-5,000	849 contacts →
	Indirect evidence “Líder nacional na fabricação e comercialização de grupos geradores, a STEMAC projeta e executa soluções em energia através da maior estrutura de atendimento, com 38 filiais…” Source: RevenueBase Database · checked Sep 20, 2026
11	Clearway Energy Group	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	501-1,000	795 contacts →
	Indirect evidence “Clearway Energy Group’s vision is a world powered by clean energy.” Source: RevenueBase Database · checked Sep 20, 2026
12	Powerica Limited	Indirect evidence	Mumbai, IndiaHQ checked Sep 20, 2026	501-1,000	785 contacts →
	Indirect evidence “Powerica is a leading manufacturer of Cummins Diesel and Gas Generators in India.” Source: RevenueBase Database · checked Sep 20, 2026
13	CESP	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 20, 2026	201-500	779 contacts →
	Indirect evidence “Criada em 1966, a partir da fusão de 11 empresas, a CESP registra em sua história iniciativas pioneiras na tecnologia construtiva de usinas e na recuperação e preservação do meio…” Source: RevenueBase Database · checked Sep 20, 2026
14	PLN Indonesia Power Services	Partial evidence	Jakarta Selatan, IndonesiaHQ checked Sep 20, 2026	5,001-10,000	734 contacts →
	Partial evidence “Berdiri sejak 15 April 1998, PT PLN Indonesia Power Services (PLN IP Services) mulai beroperasi di Jakarta pada 15 Agustus 1998.” Source: RevenueBase Database · checked Sep 20, 2026
15	Tecnogera	Indirect evidence	São Bernardo Do Campo, BrazilHQ checked Sep 20, 2026	501-1,000	721 contacts →
	Indirect evidence “A Tecnogera é uma empresa de infraestrutura e prestação de serviços em energia temporária e atua com locação de Grupos Geradores de energia, Bancos de Cargas, Torres de…” Source: RevenueBase Database · checked Sep 20, 2026
16	EDL	Indirect evidence	Brisbane, AustraliaHQ checked Sep 20, 2026	501-1,000	644 contacts →
	Indirect evidence “As a leading global producer of sustainable distributed energy, EDL is dedicated to a world of new energy for our customers, stakeholders and communities.” Source: RevenueBase Database · checked Sep 20, 2026
17	Nadara	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	501-1,000	629 contacts →
	Partial evidence “We’re Nadara, one of Europe’s largest renewable energy independent power producers.” Source: RevenueBase Database · checked Sep 20, 2026
18	Alterman, INC	Partial evidence	Live Oak, TX, United StatesHQ checked Sep 20, 2026	501-1,000	597 contacts →
	Partial evidence “Since 1923, Alterman has provided electrical construction on many of San Antonio and Austin's most impressive landmarks and contemporary structures.” Source: RevenueBase Database · checked Sep 20, 2026
19	Soenergy International	Indirect evidence	Doral, FL, United StatesHQ checked Sep 20, 2026	1,001-5,000	567 contacts →
	Indirect evidence “SoEnergy is a global provider of "energy as a service", ensuring customized solutions for a diverse array of organizations and industries worldwide, such as mining, oil & gas…” Source: RevenueBase Database · checked Sep 20, 2026
20	AKUO	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	201-500	525 contacts →
	Indirect evidence “Akuo est spécialisé dans la mise en œuvre d’unités de production d’électricité à partir de ressources renouvelables, en particulier le solaire, l'éolien et le stockage.” Source: RevenueBase Database · checked Sep 20, 2026
21	Spark Power	Partial evidence	Oakville, CanadaHQ checked Sep 20, 2026	1,001-5,000	522 contacts →
	Partial evidence “Spark Power is a leading independent provider of end-to-end electrical services, operations and maintenance services, and energy sustainability solutions to the industrial…” Source: RevenueBase Database · checked Sep 20, 2026
22	Saber Power	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	521 contacts →
	Partial evidence “Saber Power Services, a portfolio company of Greenbelt Capital Partners, is a fully integrated electrical power system services firm providing end-to-end solutions across utility…” Source: RevenueBase Database · checked Sep 20, 2026
23	APR Energy	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 20, 2026	201-500	502 contacts →
	Indirect evidence “APR Energy delivers reliable electricity, fast.” Source: RevenueBase Database · checked Sep 20, 2026
24	EC Electric	Strong evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	1,001-5,000	490 contacts →
	Strong evidence “Our lives function on a power grid.” Source: RevenueBase Database · checked Sep 20, 2026
25	Gali Energia	Indirect evidence	Bauru, BrazilHQ checked Sep 20, 2026	201-500	486 contacts →
	Indirect evidence “Desde 1995, a Gali Energia constrói uma trajetória de excelência e inovação no setor elétrico brasileiro, liderando um Brasil protagonista em soluções sustentáveis de energia.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: on-site power generation companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names on-site power generation companies.
Partial evidence: Its own public description names part of on-site power generation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name on-site power generation companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 8,170 on-site power generation companies worldwide

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On-site power generation companies worldwide at a glance

As of Sep 20, 2026

23.3%Verified-email coverage

15.8Average contacts per company

11-50Median size (employees)

0.9%Largest-city concentration · Sao Paulo

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

3,489

11-50

3,129

51-200

1,033

201-500

298

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among on-site power generation companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for on-site power generation companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “on-site power generation companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names on-site power generation companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among on-site power generation companies, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 30,202 across the full list. 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 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

On-site power generation companies by location

39 lists · largest first

Every On-site power generation companies 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 Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names on-site power generation companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many on-site power generation companies are there worldwide?

RevenueBase identified 8,170 on-site power generation companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

KENTZ, headquartered in Dubai, tops this list with the largest team on record.

Which country has the most on-site power generation companies?

The United States leads with 1,443 companies, followed by Brazil (659) and India (495). Every on-site power generation companies list by country and city is linked on this page.

Which city has the most on-site power generation companies?

Sao Paulo leads with 76 headquartered companies, followed by Houston (60) and Karachi (45).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 30,202 verified decision-maker contacts tracked across these 8,170 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 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 Smart Search, 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.