Company lists · Data refreshed September 2026

Top 25 Solar engineering consultants based in the United States

Name: Solar engineering consultants based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 3,235 companies tracked

RevenueBase identified 3,235 solar engineering consultants headquartered in the United States as of September 2026 and tracks 43,958 professional contacts across them, including 16,171 with verified work emails. New York is the largest hub.

This list covers solar engineering consultants 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 18, 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 18, 2026 86% judged on-target in blind review

3,235Companies

43,958Contacts tracked

16,171Verified emails

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The 25 largest solar engineering consultants based in the United States

Ranked by team size

Top 25 of 3,235 solar engineering consultants based in the United States, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to solar engineering consultants: 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 18, 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 18, 2026
2	Wanzek Construction, Inc., A Mastec Company	Indirect evidence	Fargo, ND, United StatesHQ checked Sep 18, 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 18, 2026
3	ION Solar	Partial evidence	Provo, UT, United StatesHQ checked Sep 18, 2026	501-1,000	912 contacts →
	Partial evidence “Ion Solar is a premium, full-service solar provider.” Source: RevenueBase Database · checked Sep 18, 2026
4	Willdan	Indirect evidence	Anaheim, CA, United StatesHQ checked Sep 18, 2026	1,001-5,000	851 contacts →
	Indirect 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 18, 2026
5	PAE	Partial evidence	Portland, OR, United StatesHQ checked Sep 18, 2026	201-500	744 contacts →
	Partial evidence “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Source: RevenueBase Database · checked Sep 18, 2026
6	SEL Construction Corporation	Indirect evidence	Loomis, CA, United StatesHQ checked Sep 18, 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 18, 2026
7	Depcom Power, INC	Strong evidence	Scottsdale, AZ, United StatesHQ checked Sep 18, 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 18, 2026
8	RRC Companies	Partial evidence	Round Rock, TX, United StatesHQ checked Sep 18, 2026	201-500	494 contacts →
	Partial evidence “RRC is a top-tier designer of utility-scale wind, solar, energy storage, data center, and oil & gas projects in the US and select international markets.” Source: RevenueBase Database · checked Sep 18, 2026
9	Freedom Solar Pros LLC	Partial evidence	Chandler, AZ, United StatesHQ checked Sep 18, 2026	51-200	484 contacts →
	Partial evidence “The future of Solar Sales” Source: RevenueBase Database · checked Sep 18, 2026
10	TRIO	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 18, 2026	201-500	383 contacts →
	Indirect evidence “We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Source: RevenueBase Database · checked Sep 18, 2026
11	Energyscape Renewables	Indirect evidence	Denver, United StatesHQ checked Sep 18, 2026	501-1,000	379 contacts →
	Indirect evidence “Established in 2019.” Source: RevenueBase Database · checked Sep 18, 2026
12	P2s	Partial evidence	Long Beach, CA, United StatesHQ checked Sep 18, 2026	201-500	375 contacts →
	Partial evidence “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Source: RevenueBase Database · checked Sep 18, 2026
13	Blue Ridge Power	Strong evidence	Asheville, NC, United StatesHQ checked Sep 18, 2026	501-1,000	369 contacts →
	Strong evidence “Established in May 2021, Blue Ridge Power is a full-service EPC (Engineering, Procurement, Construction) company for solar and solar + storage projects in the United States.” Source: RevenueBase Database · checked Sep 18, 2026
14	NEI Electric Power Engineering, INC	Partial evidence	Lakewood, CO, United StatesHQ checked Sep 18, 2026	201-500	318 contacts →
	Partial evidence “NEI provides professional expertise and design engineering services for all aspects of power systems engineering.” Source: RevenueBase Database · checked Sep 18, 2026
15	Lake Superior Consulting	Indirect evidence	Duluth, MN, United StatesHQ checked Sep 18, 2026	201-500	281 contacts →
	Indirect evidence “We act as an extension of your team, combining deep energy expertise with seamless alignment to your processes to advance projects with confidence.” Source: RevenueBase Database · checked Sep 18, 2026
16	Illumine-I	Indirect evidence	Austin, CA, United StatesHQ checked Sep 18, 2026	201-500	275 contacts →
	Indirect evidence “The world runs on power.” Source: RevenueBase Database · checked Sep 18, 2026
17	Meraki Solar	Indirect evidence	Pensacola, FL, United StatesHQ checked Sep 18, 2026	1,001-5,000	275 contacts →
	Indirect evidence “People.” Source: RevenueBase Database · checked Sep 18, 2026
18	Freedom Solar Power	Partial evidence	Austin, TX, United StatesHQ checked Sep 18, 2026	501-1,000	259 contacts →
	Partial evidence “Freedom Solar Power is the leader in turnkey solar installations in Texas, Colorado, Florida, Virginia and North Carolina, providing high quality, cost-effective, reliable solar…” Source: RevenueBase Database · checked Sep 18, 2026
19	Evs, INC	Strong evidence	Eden Prairie, MN, United StatesHQ checked Sep 18, 2026	201-500	258 contacts →
	Strong evidence “Founded in 1979, EVS is cultivating a sustainable future through quality engineering solutions for utility-scale solar plants, substations, and energy storage facilities.” Source: RevenueBase Database · checked Sep 18, 2026
20	PSC Consulting	Indirect evidence	Kirkland, WA, United StatesHQ checked Sep 18, 2026	201-500	254 contacts →
	Indirect evidence “We provide global renewable energy consulting services, focused on empowering clients to navigate the complexities of the energy transition.” Source: RevenueBase Database · checked Sep 18, 2026
21	Ampacity	Indirect evidence	Monterey, CA, United StatesHQ checked Sep 18, 2026	201-500	237 contacts →
	Indirect evidence “Ampacity delivers a forward-thinking approach to structural and electrical solutions for clean energy transition projects.” Source: RevenueBase Database · checked Sep 18, 2026
22	Allana Buick & Bers, INC	Partial evidence	Palo Alto, CA, United StatesHQ checked Sep 18, 2026	201-500	229 contacts →
	Partial evidence “Allana Buick & Bers, Inc.(ABB) is a leading Architectural Engineering firm specializing in making buildings perform better by making them energy efficient and longer lasting with…” Source: RevenueBase Database · checked Sep 18, 2026
23	Boundless, INC	Indirect evidence	Marlborough, MA, United StatesHQ checked Sep 18, 2026	201-500	229 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 18, 2026
24	Novel Energy Solutions	Partial evidence	St Paul, MN, United StatesHQ checked Sep 18, 2026	201-500	218 contacts →
	Partial evidence “Novel Energy delivers solar energy solutions helping provide sustainable options to meet evolving energy needs.” Source: RevenueBase Database · checked Sep 18, 2026
25	PEG	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 18, 2026	201-500	214 contacts →
	Indirect evidence “PEG presents a comprehensive capacity for the evaluation and understanding of a broad base of energy and environmental sustainability related programs, policies and initiatives.” Source: RevenueBase Database · checked Sep 18, 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 engineering consultants. 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 engineering consultants.
Partial evidence: Its own public description names part of solar engineering consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name solar engineering consultants. 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 3,235 solar engineering consultants based in the United States

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Solar engineering consultants based in the United States at a glance

As of Sep 18, 2026

36.8%Verified-email coverage

13.6Average contacts per company

1-10Median size (employees)

2.0%Largest-city concentration · New York

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

1,616

11-50

1,187

51-200

334

201-500

501-1,000

1,001-5,000

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 3,235 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 solar engineering consultants, 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 “solar engineering consultants”. 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 engineering consultants), 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 engineering consultants, 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, 16,171 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 18, 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 engineering consultants 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 solar engineering consultants, 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 engineering consultants are there based in the United States?

RevenueBase identified 3,235 solar engineering consultants 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?

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

Which city has the most solar engineering consultants?

New York leads with 65 headquartered companies, followed by Houston (63) and San Diego (63).

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 16,171 verified decision-maker contacts tracked across these 3,235 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 18, 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.