Company lists · Data refreshed November 2026

Top 25 Off-grid system installers based in the United States

Name: Off-grid system installers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 3,473 companies tracked

RevenueBase identified 3,473 company matches for off-grid system installers associated with the United States as of November 2026 and tracks 93,672 professional contacts across them, including 30,873 with verified work emails. Houston is the largest hub.

This list covers company matches for off-grid system installers 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 November 6, 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 Nov 6, 2026 How this list was built

3,473Companies

93,672Contacts tracked

30,873Verified emails

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

The 25 largest off-grid system installers based in the United States

Ranked by team size

Top 25 of 3,473 company matches for off-grid system installers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 Nov 6, 2026	10001+	8,270 contacts →
	Exact match “Life runs on clean energy.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Generac	Exact match	Waukesha, WI, United StatesHQ recorded Nov 6, 2026	5,001-10,000	4,041 contacts →
	Exact match “Generac is the total energy solutions company powering a smarter world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Enphase Energy	Exact match	Fremont, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	3,227 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 · Nov 6, 2026 · View company records in RevenueBase
4	FTI	Exact match	Menasha, WI, United StatesHQ recorded Nov 6, 2026	5,001-10,000	2,999 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 · Nov 6, 2026 · View company records in RevenueBase
5	Pearce Services	Exact match	Paso Robles, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,767 contacts →
	Exact match “PEARCE from CBRE is the largest national independent provider of outsourced repair, maintenance, and engineering services to critical infrastructure in the renewable energy, power…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Sunpower Corporation	Exact match	Richmond, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,036 contacts →
	Exact match “We believe clean energy and backup storage should be accessible to everybody.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Trinity Solar	Exact match	Wall Township, NJ, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,854 contacts →
	Exact match “Trinity Solar is one of the largest privately held residential solar companies in the nation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Blue Raven Solar	Exact match	Orem, UT, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,120 contacts →
	Exact match “Blue Raven Solar, a SunPower Company, is a retailer of residential home solar systems.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Wanzek Construction, Inc., A Mastec Company	Exact match	Fargo, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	977 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 · Nov 6, 2026 · View company records in RevenueBase
10	ION Solar	Exact match	Provo, UT, United StatesHQ recorded Nov 6, 2026	501-1,000	945 contacts →
	Exact match “Ion Solar is a premium, full-service solar provider.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Powersecure, INC	Exact match	Durham, NC, United StatesHQ recorded Nov 6, 2026	501-1,000	801 contacts →
	Exact match “PowerSecure, a Southern Company subsidiary, is a leading provider of innovative energy solutions to electric utilities and their industrial, institutional, and commercial…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Sunnova Energy	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	501-1,000	784 contacts →
	Exact match “Sunnova Energy International Inc.(NYSE: NOVA) is an industry-leading energy services company focused on making clean energy more accessible, reliable, and affordable for…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Baker Electric	Exact match	Escondido, CA, United StatesHQ recorded Nov 6, 2026	501-1,000	717 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 · Nov 6, 2026 · View company records in RevenueBase
14	LUMIO	Exact match	Lehi, UT, United StatesHQ recorded Nov 6, 2026	5,001-10,000	700 contacts →
	Exact match “We’re on a mission to make power personal.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Depcom Power, INC	Exact match	Scottsdale, AZ, United StatesHQ recorded Nov 6, 2026	1,001-5,000	658 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 · Nov 6, 2026 · View company records in RevenueBase
16	Nexamp	Exact match	Boston, MA, United StatesHQ recorded Nov 6, 2026	201-500	626 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 · Nov 6, 2026 · View company records in RevenueBase
17	Saber Power	Exact match	Houston, OK, United StatesHQ recorded Nov 6, 2026	1,001-5,000	586 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 · Nov 6, 2026 · View company records in RevenueBase
18	APR Energy	Exact match	Jacksonville, FL, United StatesHQ recorded Nov 6, 2026	201-500	563 contacts →
	Exact match “APR Energy delivers reliable electricity, fast.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	EC Electric	Exact match	Portland, OR, United StatesHQ recorded Nov 6, 2026	1,001-5,000	541 contacts →
	Exact match “Our lives function on a power grid.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Babcock Power	Exact match	Danvers, MA, United StatesHQ recorded Nov 6, 2026	501-1,000	528 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 · Nov 6, 2026 · View company records in RevenueBase
21	Noresco	Exact match	Westborough, NJ, United StatesHQ recorded Nov 6, 2026	201-500	496 contacts →
	Exact match “NORESCO, an OPTERRA company, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Titan Solar Power	Exact match	Santa Ana, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	464 contacts →
	Exact match “EnergyAid acquired Titan Solar Power's intellectual property (IP) in March of 2025 through bankruptcy court.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Posigen	Exact match	St. Rose, LA, United StatesHQ recorded Nov 6, 2026	501-1,000	452 contacts →
	Exact match “PosiGen is the nation's leading residential solar and energy efficiency provider.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Freedom Solar Pros LLC	Exact match	Chandler, AZ, United StatesHQ recorded Nov 6, 2026	51-200	420 contacts →
	Exact match “The future of Solar Sales” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Energy Systems Group ESG	Exact match	Newburgh, IN, United StatesHQ recorded Nov 6, 2026	201-500	420 contacts →
	Exact match “Energy Systems Group (ESG) is a leading provider of performance-driven energy and infrastructure solutions nationwide.” Recorded in the RevenueBase company graph · Nov 6, 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 “off-grid system installers”. 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 3,473 off-grid system installers based in the United States

See the full list, filter by size, metro and specialty, and access 30,873 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Off-grid system installers based in the United States at a glance

As of Nov 6, 2026

33.0%Verified-email coverage

27.0Average contacts per company

11-50Median size (employees)

1.8%Largest-city concentration · Houston

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

1,358

11-50

1,421

51-200

483

201-500

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 3,473 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 “off-grid system installers” 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 30,873 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 November 6, 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.

Off-grid system installers 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 “off-grid system installers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many off-grid system installers are there based in the United States?

RevenueBase identified 3,473 company matches for off-grid system installers associated with the United States as of November 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 off-grid system installers?

Houston leads with 63 company records, followed by San Diego (55) and Los Angeles (44).

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 30,873 professional contacts with verified work emails tracked across these 3,473 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 November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 3,473 off-grid system installers based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Off-grid system installers by geography

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.