Company lists · Data refreshed September 2026

Top 25 Photovoltaic installation companies based in the United States

Name: Photovoltaic installation companies 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 4,478 companies tracked

RevenueBase identified 4,478 photovoltaic installation companies headquartered in the United States as of September 2026 and tracks 104,591 professional contacts across them, including 34,233 with verified work emails. San Diego is the largest hub.

This list covers photovoltaic installation companies headquartered in the United States, 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 16, 2026.

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 16, 2026 86% judged on-target in blind review

4,478Companies

104,591Contacts tracked

34,233Verified emails

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The 25 largest photovoltaic installation companies based in the United States

Ranked by team size

Top 25 of 4,478 photovoltaic installation companies based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to photovoltaic installation 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	Sunrun	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 16, 2026	10001+	7,974 contacts →
	Indirect evidence “Life runs on clean energy.” Source: RevenueBase Database · checked Sep 16, 2026
2	First Solar	Indirect evidence	Tempe, AZ, United StatesHQ checked Sep 16, 2026	5,001-10,000	5,581 contacts →
	Indirect evidence “First Solar, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
3	Enphase Energy	Indirect evidence	Fremont, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	3,130 contacts →
	Indirect evidence “Enphase Energy is a global energy technology company and the world’s leading supplier of microinverter-based solar and battery systems.” Source: RevenueBase Database · checked Sep 16, 2026
4	Sunpower Corporation	Indirect evidence	Richmond, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,675 contacts →
	Indirect evidence “We believe clean energy and backup storage should be accessible to everybody.” Source: RevenueBase Database · checked Sep 16, 2026
5	Freedom Forever	Partial evidence	Temecula, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,830 contacts →
	Partial evidence “Freedom Forever is a residential solar installation company that partners with solar sales companies in the industry.” Source: RevenueBase Database · checked Sep 16, 2026
6	Trinity Solar	Indirect evidence	Wall Township, NJ, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,794 contacts →
	Indirect evidence “Trinity Solar is one of the largest privately held residential solar companies in the nation.” Source: RevenueBase Database · checked Sep 16, 2026
7	Solv Energy	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,286 contacts →
	Indirect evidence “SOLV Energy is a renewable energy solutions provider for utility solar, energy storage, and high voltage projects in North America.” Source: RevenueBase Database · checked Sep 16, 2026
8	Blue Raven Solar	Indirect evidence	Orem, UT, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,168 contacts →
	Indirect evidence “Blue Raven Solar, a SunPower Company, is a retailer of residential home solar systems.” Source: RevenueBase Database · checked Sep 16, 2026
9	Qcells North America	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 16, 2026	501-1,000	954 contacts →
	Indirect evidence “Qcells is a renowned complete energy solutions provider in solar cell and module, energy storage, downstream project business and energy retail.” Source: RevenueBase Database · checked Sep 16, 2026
10	Wanzek Construction, Inc., A Mastec Company	Indirect evidence	Fargo, ND, United StatesHQ checked Sep 16, 2026	1,001-5,000	933 contacts →
	Indirect evidence “Wanzek Construction, Inc, a MasTec Renewables company, is a leading general construction contractor and clean energy services company headquartered in Fargo, North Dakota.” Source: RevenueBase Database · checked Sep 16, 2026
11	ION Solar	Indirect evidence	Provo, UT, United StatesHQ checked Sep 16, 2026	501-1,000	912 contacts →
	Indirect evidence “Ion Solar is a premium, full-service solar provider.” Source: RevenueBase Database · checked Sep 16, 2026
12	Grid Alternatives	Indirect evidence	Oakland, CA, United StatesHQ checked Sep 16, 2026	201-500	731 contacts →
	Indirect evidence “GRID Alternatives is a national leader in bringing affordable solar power, clean mobility, and energy storage to underserved communities while creating pathways to life-changing…” Source: RevenueBase Database · checked Sep 16, 2026
13	SEL Construction Corporation	Indirect evidence	Loomis, CA, United StatesHQ checked Sep 16, 2026	n/a	722 contacts →
	Indirect evidence “Experienced commercial contractor specializing in renewable energy, electrical, and roofing projects for privately-owned buildings as well as state/local government buildings in…” Source: RevenueBase Database · checked Sep 16, 2026
14	LUMIO	Indirect evidence	Lehi, UT, United StatesHQ checked Sep 16, 2026	5,001-10,000	719 contacts →
	Indirect evidence “We’re on a mission to make power personal.” Source: RevenueBase Database · checked Sep 16, 2026
15	Baker Electric	Indirect evidence	Escondido, CA, United StatesHQ checked Sep 16, 2026	501-1,000	680 contacts →
	Indirect evidence “Baker Electric is a full-service electrical contractor and energy infrastructure expert headquartered in Escondido, California.” Source: RevenueBase Database · checked Sep 16, 2026
16	Novasource Power Services	Indirect evidence	Chandler, AZ, United StatesHQ checked Sep 16, 2026	501-1,000	631 contacts →
	Indirect evidence “NovaSource Power Services (“NovaSource”), a portfolio company of Clairvest Group Inc.(“Clairvest”, TSX: CVG) and OMERS Private Equity, the private equity arm of OMERS, is the…” Source: RevenueBase Database · checked Sep 16, 2026
17	Depcom Power, INC	Indirect evidence	Scottsdale, AZ, United StatesHQ checked Sep 16, 2026	1,001-5,000	624 contacts →
	Indirect evidence “DEPCOM Power, a Koch Engineered Solutions Company, is a leading solar energy solutions partner providing Development Support, Engineering, Procurement & Construction (EPC)…” Source: RevenueBase Database · checked Sep 16, 2026
18	Nexamp	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	201-500	607 contacts →
	Indirect evidence “Nexamp is leading the transformation to the new energy economy with proven solutions for the deployment and operation of solar energy assets.” Source: RevenueBase Database · checked Sep 16, 2026
19	Greentech Renewables	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	595 contacts →
	Indirect evidence “As Greentech Renewables, we prioritize our commitment to providing customers with exceptional service and top-tier products from prominent renewable energy manufacturers.” Source: RevenueBase Database · checked Sep 16, 2026
20	Apex Clean Energy	Indirect evidence	Charlottesville, VA, United StatesHQ checked Sep 16, 2026	201-500	594 contacts →
	Indirect evidence “Apex Clean Energy was founded with a singular focus: to accelerate the shift to clean energy.” Source: RevenueBase Database · checked Sep 16, 2026
21	Palmetto	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 16, 2026	201-500	539 contacts →
	Indirect evidence “Palmetto is a leading clean tech company on a mission to accelerate the transition to a clean energy future.” Source: RevenueBase Database · checked Sep 16, 2026
22	Unirac	Indirect evidence	Albuquerque, NM, United StatesHQ checked Sep 16, 2026	51-200	525 contacts →
	Indirect evidence “We’re reshaping the solar landscape with faster installs, stronger systems, and real support that helps pros work smarter.” Source: RevenueBase Database · checked Sep 16, 2026
23	Posigen	Indirect evidence	St. Rose, LA, United StatesHQ checked Sep 16, 2026	501-1,000	507 contacts →
	Indirect evidence “PosiGen is the nation's leading residential solar and energy efficiency provider.” Source: RevenueBase Database · checked Sep 16, 2026
24	Freedom Solar Pros LLC	Indirect evidence	Chandler, AZ, United StatesHQ checked Sep 16, 2026	51-200	484 contacts →
	Indirect evidence “The future of Solar Sales” Source: RevenueBase Database · checked Sep 16, 2026
25	Noresco	Indirect evidence	Westborough, MA, United StatesHQ checked Sep 16, 2026	201-500	481 contacts →
	Indirect evidence “NORESCO, a part of Carrier Global Corporation, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.” Source: RevenueBase Database · checked Sep 16, 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: photovoltaic installation 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 photovoltaic installation companies.
Partial evidence: Its own public description names part of photovoltaic installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name photovoltaic installation 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 4,478 photovoltaic installation companies based in the United States

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Photovoltaic installation companies based in the United States at a glance

As of Sep 16, 2026

32.7%Verified-email coverage

23.4Average contacts per company

11-50Median size (employees)

1.9%Largest-city concentration · San Diego

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

1,680

11-50

1,886

51-200

648

201-500

139

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 4,478 companies.

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 photovoltaic installation 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “photovoltaic installation 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 photovoltaic installation 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 photovoltaic installation companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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, 34,233 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 16, 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.

Photovoltaic installation companies by metro

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 photovoltaic installation 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 photovoltaic installation companies are there based in the United States?

RevenueBase identified 4,478 photovoltaic installation companies headquartered in the United States 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?

Sunrun, headquartered in San Francisco, tops this list with the largest team on record.

Which city has the most photovoltaic installation companies?

San Diego leads with 87 headquartered companies, followed by Houston (72) and Austin (62).

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 34,233 verified decision-maker contacts tracked across these 4,478 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 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 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.