Company lists · Data refreshed September 2026

Top 25 On-site power generation companies based in the United States

RevenueBase identified 1,443 company matches for on-site power generation companies associated with the United States as of September 2026 and tracks 36,587 professional contacts across them, including 13,236 with verified work emails. Houston is the largest hub.

This list covers company matches for on-site power generation companies 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 20, 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 20, 2026 How this list was built
1,443Companies
36,587Contacts tracked
13,236Verified emails
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The 25 largest on-site power generation companies based in the United States

Ranked by team size
Top 25 of 1,443 company matches for on-site power generation companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchAtlanta, GA, United StatesHQ recorded Sep 20, 202610001+3,700 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2Exact matchSan Jose, CA, United StatesHQ recorded Sep 20, 20261,001-5,0002,221 contacts →

Exact match

“Bloom Energy empowers businesses and communities to responsibly take charge of their energy.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3Exact matchHouston, TX, United StatesHQ recorded Sep 20, 20261,001-5,0002,112 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4Exact matchLake Mary, FL, United StatesHQ recorded Sep 20, 20261,001-5,0001,859 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 20, 2026 · View company records in RevenueBase
5Exact matchSan Francisco, CA, United StatesHQ recorded Sep 20, 2026501-1,000795 contacts →

Exact match

“Clearway Energy Group’s vision is a world powered by clean energy.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6Exact matchLive Oak, TX, United StatesHQ recorded Sep 20, 2026501-1,000597 contacts →

Exact match

“Since 1923, Alterman has provided electrical construction on many of San Antonio and Austin's most impressive landmarks and contemporary structures.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7Exact matchDoral, FL, United StatesHQ recorded Sep 20, 20261,001-5,000567 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8Exact matchHouston, TX, United StatesHQ recorded Sep 20, 20261,001-5,000521 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9Exact matchJacksonville, FL, United StatesHQ recorded Sep 20, 2026201-500502 contacts →

Exact match

“APR Energy delivers reliable electricity, fast.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10Exact matchPortland, OR, United StatesHQ recorded Sep 20, 20261,001-5,000490 contacts →

Exact match

“Our lives function on a power grid.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11Exact matchWestborough, MA, United StatesHQ recorded Sep 20, 2026201-500481 contacts →

Exact match

“NORESCO, a part of Carrier Global Corporation, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12Exact matchMenlo Park, CA, United StatesHQ recorded Sep 20, 2026201-500479 contacts →

Exact match

“Mainspring is a power generator manufacturer redefining how local power is delivered to capacity constrained companies and communities.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13Exact matchDanvers, MA, United StatesHQ recorded Sep 20, 2026501-1,000476 contacts →

Exact match

“Finding a single capable partner to support both large- and small-scale power generation needs can be challenging.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14Exact matchCarrollton, TX, United StatesHQ recorded Sep 20, 20261,001-5,000426 contacts →

Exact match

“Concentric is the first national industrial power services organization delivering forklift and critical power as well as maintenance solutions that ensure uninterrupted…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15Exact matchIrvine, CA, United StatesHQ recorded Sep 20, 2026201-500370 contacts →

Exact match

“Supernova embodies the spirit of innovation and dedication to a sustainable future, making it a shining example of what it means to be a leader in the renewable energy industry.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16Exact matchHouston, TX, United StatesHQ recorded Sep 20, 2026501-1,000331 contacts →

Exact match

“Solaris Energy Infrastructure (NYSE: SEI) delivers proprietary power generation and distribution solutions, as well as logistics equipment and services, to clients in the data…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17Exact matchLoveland, CO, United StatesHQ recorded Sep 20, 20261,001-5,000329 contacts →

Exact match

“We are a leading energy services provider specializing in the engineering, manufacturing, sales, leasing, and operations of cutting-edge power technology including natural gas and…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18Exact matchAnaheim, CA, United StatesHQ recorded Sep 20, 2026201-500323 contacts →

Exact match

“For more than 35 years, Power Plus has been serving our customers across the Country providing Temporary Power, Rental Generators, and performing Generator Service & Maintenance.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19Exact matchAliso Viejo, CA, United StatesHQ recorded Sep 20, 2026501-1,000319 contacts →

Exact match

“IHI Power Services Corp.(IPSC) provides operations, maintenance, and management services to the US power generation industry.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20Exact matchTemple, TX, United StatesHQ recorded Sep 20, 20261,001-5,000271 contacts →

Exact match

“Sunbelt Solomon is a leading provider of customized electrical power solutions and services.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21Exact matchSt. Paul, MN, United StatesHQ recorded Sep 20, 2026201-500218 contacts →

Exact match

“Novel Energy delivers solar energy solutions helping provide sustainable options to meet evolving energy needs.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22Exact matchDetroit, MI, United StatesHQ recorded Sep 20, 2026501-1,000215 contacts →

Exact match

“Detroit-headquartered Motor City Electric Co.(MCE) is one of the largest contractors in the nation, and has built an organization centered around service, capability, safety, and…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23Exact matchSacramento, CA, United StatesHQ recorded Sep 20, 2026501-1,000208 contacts →

Exact match

“Rex Moore Group, Inc.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24Exact matchTomball, TX, United StatesHQ recorded Sep 20, 2026501-1,000205 contacts →

Exact match

“Generator Supercenter is a company based out of United States.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25Exact matchMckinney, TX, United StatesHQ recorded Sep 20, 2026201-500205 contacts →

Exact match

“At Maverick Power, we are revolutionizing power solutions for businesses with a strong commitment to innovation, efficiency, and reliability.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

Showing 25 of 1,443 on-site power generation companies based in the United States

See the full list, filter by size, metro and specialty, and access 13,236 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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On-site power generation companies based in the United States at a glance

As of Sep 20, 2026
36.2%Verified-email coverage
25.4Average contacts per company
11-50Median size (employees)
4.2%Largest-city concentration · Houston
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
597
11-50
551
51-200
202
201-500
38
501-1,000
18
1,001-5,000
21
5,001-10,000
2
10001+
2

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 1,443 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 “on-site power generation companies” 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 13,236 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 20, 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.

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 “on-site power generation companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many on-site power generation companies are there based in the United States?

RevenueBase identified 1,443 company matches for on-site power generation companies 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?

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

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

Houston leads with 60 company records, followed by New York (21) and Austin (19).

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 13,236 professional contacts with verified work emails tracked across these 1,443 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 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,443 on-site power generation companies based in the United States. Start with a free account, no credit card.

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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.