Company lists · Data refreshed September 2026

Top 25 Solar energy consulting firms worldwide

Name: Solar energy consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 36,119 companies tracked

RevenueBase identified 36,119 solar energy consulting firms worldwide as of September 2026 and tracks 285,865 professional contacts across them, including 67,083 with verified work emails. The United States is the largest market and Madrid the largest hub.

This list covers solar energy consulting firms worldwide, 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 29, 2026. Country and city lists for solar energy consulting firms follow the table.

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 29, 2026 86% judged on-target in blind review

36,119Companies

285,865Contacts tracked

67,083Verified emails

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The 25 largest solar energy consulting firms worldwide

Ranked by team size

Top 25 of 36,119 solar energy consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to solar energy consulting firms: 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	FTI	Partial evidence	Menasha, WI, United StatesHQ checked Sep 29, 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 29, 2026
2	MOSS	Indirect evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 29, 2026	5,001-10,000	2,214 contacts →
	Indirect evidence “Moss is a national, privately-held construction firm providing innovative solutions resulting in award-winning projects.” Source: RevenueBase Database · checked Sep 29, 2026
3	Freedom Forever	Partial evidence	Temecula, CA, United StatesHQ checked Sep 29, 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 29, 2026
4	Solarsquare	Partial evidence	Mumbai, IndiaHQ checked Sep 29, 2026	1,001-5,000	1,812 contacts →
	Partial evidence “At SolarSquare, we make going solar simple, reliable, and worry-free.” Source: RevenueBase Database · checked Sep 29, 2026
5	Trinity Solar	Partial evidence	Wall Township, NJ, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,794 contacts →
	Partial evidence “Trinity Solar is one of the largest privately held residential solar companies in the nation.” Source: RevenueBase Database · checked Sep 29, 2026
6	Blue Raven Solar	Partial evidence	Orem, UT, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,168 contacts →
	Partial evidence “Blue Raven Solar, a SunPower Company, is a retailer of residential home solar systems.” Source: RevenueBase Database · checked Sep 29, 2026
7	OLA	Partial evidence	Austin, TX, United StatesHQ checked Sep 29, 2026	n/a	1,145 contacts →
	Partial evidence “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Source: RevenueBase Database · checked Sep 29, 2026
8	Qcells North America	Strong evidence	Irvine, CA, United StatesHQ checked Sep 29, 2026	501-1,000	954 contacts →
	Strong 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 29, 2026
9	Wanzek Construction, Inc., A Mastec Company	Partial evidence	Fargo, ND, United StatesHQ checked Sep 29, 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 29, 2026
10	ION Solar	Partial evidence	Provo, UT, United StatesHQ checked Sep 29, 2026	501-1,000	912 contacts →
	Partial evidence “Ion Solar is a premium, full-service solar provider.” Source: RevenueBase Database · checked Sep 29, 2026
11	Willdan	Partial evidence	Anaheim, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	851 contacts →
	Partial evidence “Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.” Source: RevenueBase Database · checked Sep 29, 2026
12	Saatvik Solar	Strong evidence	Gurugram, IndiaHQ checked Sep 29, 2026	1,001-5,000	819 contacts →
	Strong evidence “Saatvik Green Energy (‘Saatvik Solar”) ranks among the “Top Solar Panel Manufacturers” in India with an annual current production capacity of 4.8GW/Annum, having its…” Source: RevenueBase Database · checked Sep 29, 2026
13	SEL Construction Corporation	Partial evidence	Loomis, CA, United StatesHQ checked Sep 29, 2026	n/a	722 contacts →
	Partial 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 29, 2026
14	LUMIO	Indirect evidence	Lehi, UT, United StatesHQ checked Sep 29, 2026	5,001-10,000	719 contacts →
	Indirect evidence “We’re on a mission to make power personal.” Source: RevenueBase Database · checked Sep 29, 2026
15	Ilumisol Energia Solar	Strong evidence	Cascavel, BrazilHQ checked Sep 29, 2026	n/a	709 contacts →
	Strong evidence “Na Ilumisol Energia Solar, acreditamos que sustentabilidade e economia andam juntas.” Source: RevenueBase Database · checked Sep 29, 2026
16	Depcom Power, INC	Strong evidence	Scottsdale, AZ, United StatesHQ checked Sep 29, 2026	1,001-5,000	624 contacts →
	Strong 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 29, 2026
17	Fenice Energy	Strong evidence	Chennai, IndiaHQ checked Sep 29, 2026	201-500	614 contacts →
	Strong evidence “Fenice Energy provides high-quality end-to-end clean energy solutions for homes including solar, backup, and eV charging.” Source: RevenueBase Database · checked Sep 29, 2026
18	Nexamp	Strong evidence	Boston, MA, United StatesHQ checked Sep 29, 2026	201-500	607 contacts →
	Strong 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 29, 2026
19	Greentech Renewables	Partial evidence	San Diego, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	595 contacts →
	Partial 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 29, 2026
20	Rays Power Infra Limited	Partial evidence	Jaipur, IndiaHQ checked Sep 29, 2026	501-1,000	594 contacts →
	Partial evidence “Established in 2011, we have been one of the early movers in the solar park regime and have now grown into a well-established player in turnkey solar engineering, procurement and…” Source: RevenueBase Database · checked Sep 29, 2026
21	Grupotec	Partial evidence	Valencia, SpainHQ checked Sep 29, 2026	501-1,000	538 contacts →
	Partial evidence “GRUPOTEC - Empresa multidisciplinar de ingeniería y arquitectura y líder en el sector de la energía fotovoltaica.” Source: RevenueBase Database · checked Sep 29, 2026
22	Posigen	Strong evidence	St. Rose, LA, United StatesHQ checked Sep 29, 2026	501-1,000	507 contacts →
	Strong evidence “PosiGen is the nation's leading residential solar and energy efficiency provider.” Source: RevenueBase Database · checked Sep 29, 2026
23	Revergy	Partial evidence	Seville, SpainHQ checked Sep 29, 2026	501-1,000	502 contacts →
	Partial evidence “REVERGY nace mediante un proyecto de profesionales procedentes de diferentes ámbitos del sector de las energías renovables con el fin de presentar un proyecto marcado por la…” Source: RevenueBase Database · checked Sep 29, 2026
24	Natural Power	Partial evidence	Castle Douglas, United KingdomHQ checked Sep 29, 2026	501-1,000	500 contacts →
	Partial evidence “Natural Power is a leading independent consultancy and service provider for the renewable energy sector.” Source: RevenueBase Database · checked Sep 29, 2026
25	Fotus Distribuidora Solar	Strong evidence	Vila Velha, BrazilHQ checked Sep 29, 2026	501-1,000	496 contacts →
	Strong evidence “A Fotus Distribuidora Solar é uma distribuidora nacional de soluções em energia fotovoltaica, criada para impulsionar o crescimento sustentável do mercado solar no Brasil.” Source: RevenueBase Database · checked Sep 29, 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: solar energy consulting firms. 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 solar energy consulting firms.
Partial evidence: Its own public description names part of solar energy consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name solar energy consulting firms. 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 36,119 solar energy consulting firms worldwide

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Solar energy consulting firms worldwide at a glance

As of Sep 29, 2026

23.5%Verified-email coverage

7.9Average contacts per company

1-10Median size (employees)

0.7%Largest-city concentration · Madrid

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

19,919

11-50

12,109

51-200

3,011

201-500

606

501-1,000

131

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 solar energy consulting firms, 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.
Coverage: Every country. Country and city lists for solar energy consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “solar energy consulting firms”. 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 solar energy consulting firms), 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 solar energy consulting firms, and records with no verified work email.
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, 67,083 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 29, 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.

Solar energy consulting firms by location

135 lists · largest first

Every Solar energy consulting firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 solar energy consulting firms, 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 solar energy consulting firms are there worldwide?

RevenueBase identified 36,119 solar energy consulting firms worldwide 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?

FTI, headquartered in Menasha, tops this list with the largest team on record.

Which country has the most solar energy consulting firms?

The United States leads with 5,910 companies, followed by Brazil (2,938) and India (2,890). Every solar energy consulting firms list by country and city is linked on this page.

Which city has the most solar energy consulting firms?

Madrid leads with 237 headquartered companies, followed by Lahore (221) and Sao Paulo (210).

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 67,083 verified decision-maker contacts tracked across these 36,119 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 29, 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.