Company lists · Data refreshed October 2026

Top 25 Commercial solar engineering firms based in the United States

Name: Commercial solar engineering firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 10, 2026 8,164 companies tracked

RevenueBase identified 8,164 company matches for commercial solar engineering firms associated with the United States as of October 2026 and tracks 169,863 professional contacts across them, including 60,675 with verified work emails. New York is the largest hub.

This list covers company matches for commercial solar engineering 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 October 10, 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 Oct 10, 2026 How this list was built

8,164Companies

169,863Contacts tracked

60,675Verified emails

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The 25 largest commercial solar engineering firms based in the United States

Ranked by team size

Top 25 of 8,164 company matches for commercial solar engineering firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 10, 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	Sunrun	Exact match	San Francisco, CA, United StatesHQ recorded Oct 10, 2026	10001+	7,991 contacts →
	Exact match “Life runs on clean energy.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
2	FTI	Exact match	Menasha, WI, United StatesHQ recorded Oct 10, 2026	1,001-5,000	2,979 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 · Oct 10, 2026 · View company records in RevenueBase
3	MOSS	Exact match	Fort Lauderdale, FL, United StatesHQ recorded Oct 10, 2026	5,001-10,000	2,323 contacts →
	Exact match “Moss is a national, privately-held construction firm providing innovative solutions resulting in award-winning projects.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
4	IMEG	Exact match	Rock Island, IL, United StatesHQ recorded Oct 10, 2026	1,001-5,000	2,064 contacts →
	Exact match “Leaders in Engineering and Innovation.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
5	Sunpower Corporation	Exact match	Richmond, CA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	2,009 contacts →
	Exact match “We believe clean energy and backup storage should be accessible to everybody.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
6	Enercon Services, INC	Exact match	Kennesaw, GA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	1,980 contacts →
	Exact match “ENERCON is a multi-discipline engineering and environmental engineering support services firm focused on delivering safe and efficient solutions for the power, data center and…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
7	Trinity Solar	Exact match	Wall Township, NJ, United StatesHQ recorded Oct 10, 2026	1,001-5,000	1,782 contacts →
	Exact match “Trinity Solar is one of the largest privately held residential solar companies in the nation.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8	Bowman Consulting	Exact match	Reston, VA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	1,778 contacts →
	Exact match “Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
9	Freedom Forever	Exact match	Temecula, CA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	1,684 contacts →
	Exact match “Freedom Forever is a residential solar installation company that partners with solar sales companies in the industry.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
10	Solv Energy	Exact match	San Diego, CA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	1,437 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 · Oct 10, 2026 · View company records in RevenueBase
11	Blue Raven Solar	Exact match	Orem, UT, United StatesHQ recorded Oct 10, 2026	1,001-5,000	1,075 contacts →
	Exact match “Blue Raven Solar, a SunPower Company, is a retailer of residential home solar systems.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
12	Qcells North America	Exact match	Irvine, CA, United StatesHQ recorded Oct 10, 2026	501-1,000	1,041 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 · Oct 10, 2026 · View company records in RevenueBase
13	Wanzek Construction, Inc., A Mastec Company	Exact match	Fargo, ND, United StatesHQ recorded Oct 10, 2026	1,001-5,000	946 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 · Oct 10, 2026 · View company records in RevenueBase
14	ION Solar	Exact match	Provo, UT, United StatesHQ recorded Oct 10, 2026	501-1,000	913 contacts →
	Exact match “Ion Solar is a premium, full-service solar provider.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
15	Willdan	Exact match	Anaheim, CA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	872 contacts →
	Exact match “Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
16	Syska Hennessy Group	Exact match	New York, United StatesHQ recorded Oct 10, 2026	501-1,000	835 contacts →
	Exact match “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17	PAE	Exact match	Portland, OR, United StatesHQ recorded Oct 10, 2026	201-500	835 contacts →
	Exact match “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
18	M3 Engineering & Technology Corp	Exact match	Tucson, AZ, United StatesHQ recorded Oct 10, 2026	501-1,000	756 contacts →
	Exact match “M3 is a privately held full service design firm.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
19	SEL Construction Corporation	Exact match	Loomis, CA, United StatesHQ recorded Oct 10, 2026	n/a	722 contacts →
	Exact match “Experienced commercial contractor specializing in renewable energy, electrical, and roofing projects for privately-owned buildings as well as state/local government buildings in…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
20	Baker Electric	Exact match	Escondido, CA, United StatesHQ recorded Oct 10, 2026	501-1,000	704 contacts →
	Exact match “Baker Electric is a full-service electrical contractor and energy infrastructure expert headquartered in Escondido, California.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
21	Electric Power Systems	Exact match	Maryland Heights, MO, United StatesHQ recorded Oct 10, 2026	501-1,000	666 contacts →
	Exact match “Electric Power Systems is an independent electrical testing & engineering organization.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
22	LUMIO	Exact match	Lehi, UT, United StatesHQ recorded Oct 10, 2026	5,001-10,000	659 contacts →
	Exact match “We’re on a mission to make power personal.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
23	Depcom Power, INC	Exact match	Scottsdale, AZ, United StatesHQ recorded Oct 10, 2026	1,001-5,000	631 contacts →
	Exact match “DEPCOM Power, a Koch Engineered Solutions Company, is a leading solar energy solutions partner providing Development Support, Engineering, Procurement & Construction (EPC)…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24	Alterman, INC	Exact match	Live Oak, TX, United StatesHQ recorded Oct 10, 2026	501-1,000	615 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 · Oct 10, 2026 · View company records in RevenueBase
25	Nexamp	Exact match	Boston, MA, United StatesHQ recorded Oct 10, 2026	201-500	610 contacts →
	Exact match “Nexamp is leading the transformation to the new energy economy with proven solutions for the deployment and operation of solar energy assets.” Recorded in the RevenueBase company graph · Oct 10, 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 “commercial solar engineering 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 8,164 commercial solar engineering firms based in the United States

See the full list, filter by size, metro and specialty, and access 60,675 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Commercial solar engineering firms based in the United States at a glance

As of Oct 10, 2026

35.7%Verified-email coverage

20.8Average contacts per company

11-50Median size (employees)

1.8%Largest-city concentration · New York

Oct 10, 2026Page data refreshed

Companies by employee count

1-10

3,486

11-50

3,207

51-200

1,096

201-500

212

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 8,164 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 “commercial solar engineering 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 60,675 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 October 10, 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.

Commercial solar engineering 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 “commercial solar engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many commercial solar engineering firms are there based in the United States?

RevenueBase identified 8,164 company matches for commercial solar engineering firms associated with the United States as of October 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?

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

Which city has the most commercial solar engineering firms?

New York leads with 147 company records, followed by Houston (134) and San Diego (132).

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 60,675 professional contacts with verified work emails tracked across these 8,164 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 October 10, 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.