Company lists · Data refreshed September 2026

Top 25 Off grid energy companies based in the United States

Name: Off grid energy 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 15, 2026 2,878 companies tracked

RevenueBase identified 2,878 off grid energy companies headquartered in the United States as of September 2026 and tracks 68,662 professional contacts across them, including 21,894 with verified work emails. Houston is the largest hub.

This list covers off grid energy 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 15, 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 15, 2026 86% judged on-target in blind review

2,878Companies

68,662Contacts tracked

21,894Verified emails

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The 25 largest off grid energy companies based in the United States

Ranked by team size

Top 25 of 2,878 off grid energy companies based in the United States, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to off grid energy 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	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 15, 2026	10001+	7,974 contacts →
	Partial evidence “Life runs on clean energy.” Source: RevenueBase Database · checked Sep 15, 2026
2	FTI	Partial evidence	Menasha, WI, United StatesHQ checked Sep 15, 2026	1,001-5,000	2,741 contacts →
	Partial evidence “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Source: RevenueBase Database · checked Sep 15, 2026
3	Sunpower Corporation	Partial evidence	Richmond, CA, United StatesHQ checked Sep 15, 2026	1,001-5,000	2,675 contacts →
	Partial evidence “We believe clean energy and backup storage should be accessible to everybody.” Source: RevenueBase Database · checked Sep 15, 2026
4	Mitsubishi Power Americas	Indirect evidence	Lake Mary, FL, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,859 contacts →
	Indirect evidence “Mitsubishi Power Americas is creating a future that works for people and the planet through innovative power generation technology and solutions.” Source: RevenueBase Database · checked Sep 15, 2026
5	Trinity Solar	Indirect evidence	Wall Township, NJ, United StatesHQ checked Sep 15, 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 15, 2026
6	Solv Energy	Partial evidence	San Diego, CA, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,286 contacts →
	Partial 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 15, 2026
7	Wanzek Construction, Inc., A Mastec Company	Partial evidence	Fargo, ND, United StatesHQ checked Sep 15, 2026	1,001-5,000	933 contacts →
	Partial 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 15, 2026
8	ION Solar	Indirect evidence	Provo, UT, United StatesHQ checked Sep 15, 2026	501-1,000	912 contacts →
	Indirect evidence “Ion Solar is a premium, full-service solar provider.” Source: RevenueBase Database · checked Sep 15, 2026
9	Sunnova Energy	Partial evidence	Houston, TX, United StatesHQ checked Sep 15, 2026	501-1,000	906 contacts →
	Partial evidence “Sunnova Energy International Inc.(NYSE: NOVA) is an industry-leading energy services company focused on making clean energy more accessible, reliable, and affordable for…” Source: RevenueBase Database · checked Sep 15, 2026
10	LUMIO	Indirect evidence	Lehi, UT, United StatesHQ checked Sep 15, 2026	5,001-10,000	719 contacts →
	Indirect evidence “We’re on a mission to make power personal.” Source: RevenueBase Database · checked Sep 15, 2026
11	Depcom Power, INC	Partial evidence	Scottsdale, AZ, United StatesHQ checked Sep 15, 2026	1,001-5,000	624 contacts →
	Partial 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 15, 2026
12	Nexamp	Partial evidence	Boston, MA, United StatesHQ checked Sep 15, 2026	201-500	607 contacts →
	Partial 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 15, 2026
13	Ecoflow	Partial evidence	Seattle, WA, United StatesHQ checked Sep 15, 2026	1,001-5,000	506 contacts →
	Partial evidence “EcoFlow is a leading eco-friendly energy solutions company with the vision to power a new world.” Source: RevenueBase Database · checked Sep 15, 2026
14	Freedom Solar Pros LLC	Indirect evidence	Chandler, AZ, United StatesHQ checked Sep 15, 2026	51-200	484 contacts →
	Indirect evidence “The future of Solar Sales” Source: RevenueBase Database · checked Sep 15, 2026
15	Noresco	Partial evidence	Westborough, MA, United StatesHQ checked Sep 15, 2026	201-500	481 contacts →
	Partial 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 15, 2026
16	REC Solar	Indirect evidence	San Luis Obispo, CA, United StatesHQ checked Sep 15, 2026	n/a	471 contacts →
	Indirect evidence “Founded in 1997, REC Solar has emerged as a leader in the solar industry, installing 800+ solar and storage solutions for commercial and public sector customers nationwide.” Source: RevenueBase Database · checked Sep 15, 2026
17	Signal Energy	Partial evidence	Houston, TX, United StatesHQ checked Sep 15, 2026	1,001-5,000	409 contacts →
	Partial evidence “Signal Energy is a leading full service design/build contractor providing Engineering, Procurement, and Construction (EPC) services for renewable energy & infrastructure projects.” Source: RevenueBase Database · checked Sep 15, 2026
18	Energyscape Renewables	Indirect evidence	Denver, United StatesHQ checked Sep 15, 2026	501-1,000	379 contacts →
	Indirect evidence “Established in 2019.” Source: RevenueBase Database · checked Sep 15, 2026
19	Supernova	Partial evidence	Irvine, CA, United StatesHQ checked Sep 15, 2026	201-500	370 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 15, 2026
20	Takkion	Partial evidence	Evansville, WY, United StatesHQ checked Sep 15, 2026	1,001-5,000	358 contacts →
	Partial evidence “TAKKION is Moving Energy Forward.” Source: RevenueBase Database · checked Sep 15, 2026
21	Semper Solaris	Indirect evidence	El Cajon, CA, United StatesHQ checked Sep 15, 2026	501-1,000	337 contacts →
	Indirect evidence “Ranked #1 in Solar + Battery Installation in America by "Solar Power World" Go Solar American Style!#1 Veteran Owned Solar Company in California Solar Panels.” Source: RevenueBase Database · checked Sep 15, 2026
22	Solar Energy World	Partial evidence	Laurel, MD, United StatesHQ checked Sep 15, 2026	501-1,000	337 contacts →
	Partial evidence “With tens of thousands of customers, Solar Energy World is the fastest growing solar and battery system installation company in our region, serving Delaware, Florida, Maryland…” Source: RevenueBase Database · checked Sep 15, 2026
23	NEI Electric Power Engineering, INC	Indirect evidence	Lakewood, CO, United StatesHQ checked Sep 15, 2026	201-500	318 contacts →
	Indirect evidence “NEI provides professional expertise and design engineering services for all aspects of power systems engineering.” Source: RevenueBase Database · checked Sep 15, 2026
24	Illuminate USA	Partial evidence	Pataskala, OH, United StatesHQ checked Sep 15, 2026	1,001-5,000	315 contacts →
	Partial evidence “Illuminate USA is an American leader in advanced clean energy manufacturing, dedicated to delivering cutting-edge solar panel technology and sustainable energy solutions.” Source: RevenueBase Database · checked Sep 15, 2026
25	Everlight Solar	Partial evidence	Verona, WI, United StatesHQ checked Sep 15, 2026	51-200	294 contacts →
	Partial evidence “Everlight Solar provides homeowners with simple and affordable clean energy.” Source: RevenueBase Database · checked Sep 15, 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: off grid energy 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 off grid energy companies.
Partial evidence: Its own public description names part of off grid energy companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name off grid energy 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 2,878 off grid energy companies based in the United States

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Off grid energy companies based in the United States at a glance

As of Sep 15, 2026

31.9%Verified-email coverage

23.9Average contacts per company

11-50Median size (employees)

1.9%Largest-city concentration · Houston

Sep 15, 2026Page data refreshed

Companies by employee count

1-10

1,162

11-50

1,173

51-200

392

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 2,878 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 off grid energy 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 “off grid energy 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 off grid energy 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 off grid energy 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, 21,894 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 15, 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.

Off grid energy 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 off grid energy 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 off grid energy companies are there based in the United States?

RevenueBase identified 2,878 off grid energy 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 off grid energy companies?

Houston leads with 56 headquartered companies, followed by San Diego (53) and New York (52).

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 21,894 verified decision-maker contacts tracked across these 2,878 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 15, 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.