Company lists · Data refreshed September 2026

Top 25 Renewable energy research firms based in the United States

Name: Renewable energy research firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 864 companies tracked

RevenueBase identified 864 renewable energy research firms headquartered in the United States as of September 2026 and tracks 12,566 professional contacts across them, including 5,275 with verified work emails. New York is the largest hub.

This list covers renewable energy research firms 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 17, 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 17, 2026 86% judged on-target in blind review

864Companies

12,566Contacts tracked

5,275Verified emails

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The 25 largest renewable energy research firms based in the United States

Ranked by team size

Top 25 of 864 renewable energy research firms based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to renewable energy research 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	EPRI	Strong evidence	Palo Alto, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,870 contacts →
	Strong evidence “Founded in 1972, EPRI is the world's preeminent independent, non-profit energy research and development organization, with offices around the world.” Source: RevenueBase Database · checked Sep 17, 2026
2	TRIO	Partial evidence	Irvine, CA, United StatesHQ checked Sep 17, 2026	201-500	383 contacts →
	Partial evidence “We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Source: RevenueBase Database · checked Sep 17, 2026
3	Takkion	Partial evidence	Evansville, WY, United StatesHQ checked Sep 17, 2026	1,001-5,000	358 contacts →
	Partial evidence “TAKKION is Moving Energy Forward.” Source: RevenueBase Database · checked Sep 17, 2026
4	PSC Consulting	Strong evidence	Kirkland, WA, United StatesHQ checked Sep 17, 2026	201-500	254 contacts →
	Strong 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 17, 2026
5	Energy & Environmental Research Center	Strong evidence	Grand Forks, ND, United StatesHQ checked Sep 17, 2026	201-500	213 contacts →
	Strong evidence “The Energy & Environmental Research Center (EERC) is recognized as one of the world's leading developers of cleaner, more efficient energy to power the world and environmental…” Source: RevenueBase Database · checked Sep 17, 2026
6	Nexant	Partial evidence	Half Moon Bay, CA, United StatesHQ checked Sep 17, 2026	201-500	183 contacts →
	Partial evidence “Resource Innovations now combined with Nexant is a substantially woman-owned, woman-led energy consulting firm dedicated to creating equal access to clean resources through…” Source: RevenueBase Database · checked Sep 17, 2026
7	Green World Renewable Energy LLC	Strong evidence	Brooklyn, MD, United StatesHQ checked Sep 17, 2026	201-500	182 contacts →
	Strong evidence “Green World Renewable Energy delivers smart, scalable solar engineering and back-office design solutions for residential, commercial, and utility-scale projects across the U.S.” Source: RevenueBase Database · checked Sep 17, 2026
8	Energy And Environmental Economics, INC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	156 contacts →
	Partial evidence “Energy.” Source: RevenueBase Database · checked Sep 17, 2026
9	NRG Systems	Indirect evidence	Hinesburg, VT, United StatesHQ checked Sep 17, 2026	51-200	120 contacts →
	Indirect evidence “NRG Systems is the global leader in wind and solar resource measurement and intelligence.” Source: RevenueBase Database · checked Sep 17, 2026
10	Groundwork Renewables	Partial evidence	Sand City, CA, United StatesHQ checked Sep 17, 2026	51-200	116 contacts →
	Partial evidence “GroundWork Renewables is the leading provider of high-quality meteorological (MET) data and ISO-accredited PV lab testing to give solar plant owners complete situational awareness…” Source: RevenueBase Database · checked Sep 17, 2026
11	Adm, A Qualus Company	Partial evidence	Sacramento, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	102 contacts →
	Partial evidence “Qualus is a leading pure-play power services firm and innovator at the forefront of the energy transition and transformation, with differentiated capabilities across grid…” Source: RevenueBase Database · checked Sep 17, 2026
12	Environ Energy	Partial evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	98 contacts →
	Partial evidence “Environ Energy is a leader in accelerating global sustainable energy transformation for more than 30 years.” Source: RevenueBase Database · checked Sep 17, 2026
13	Panthalassa	Strong evidence	Portland, OR, United StatesHQ checked Sep 17, 2026	51-200	91 contacts →
	Strong evidence “The open ocean is Earth’s largest and most power-dense renewable energy resource.” Source: RevenueBase Database · checked Sep 17, 2026
14	Opinion Dynamics	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 17, 2026	51-200	88 contacts →
	Indirect evidence “Emerging Questions.” Source: RevenueBase Database · checked Sep 17, 2026
15	Euclid Power	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	85 contacts →
	Strong evidence “Euclid Power is comprised of a team of industry-leading veterans within renewable energy project development, diligence, finance, and execution with over 10GW of PV and 5GWh of…” Source: RevenueBase Database · checked Sep 17, 2026
16	Erco Energy Texas	Partial evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	11-50	76 contacts →
	Partial evidence “We help homes and business to reach energy independence trough: Clean, Affordable and Digital Energy” Source: RevenueBase Database · checked Sep 17, 2026
17	Joule Energy	Partial evidence	New Orleans, LA, United StatesHQ checked Sep 17, 2026	51-200	62 contacts →
	Partial evidence “Joule Energy, a Louisiana owned and operated company, was founded on the principle that investing in energy innovation can be as beneficial to the bottom-line as it is to the…” Source: RevenueBase Database · checked Sep 17, 2026
18	Synapse Energy Economics	Partial evidence	Cambridge, MA, United StatesHQ checked Sep 17, 2026	11-50	59 contacts →
	Partial evidence “Synapse Energy Economics, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
19	IOWN	Strong evidence	La Jolla, CA, United StatesHQ checked Sep 17, 2026	51-200	55 contacts →
	Strong evidence “We want to facilitate the transition from fossil fuels to clean, renewable energy.” Source: RevenueBase Database · checked Sep 17, 2026
20	Eeplus, INC	Partial evidence	Lewisville, TX, United StatesHQ checked Sep 17, 2026	11-50	53 contacts →
	Partial evidence “EEPLUS is a niche strategic energy advisory firm specializing in all aspects of next generation grid, transmission and distribution infrastructure projects with a special focus on…” Source: RevenueBase Database · checked Sep 17, 2026
21	NMR Group, INC	Strong evidence	Somerville, MA, United StatesHQ checked Sep 17, 2026	11-50	50 contacts →
	Strong evidence “NMR Group helps clients evaluate energy-efficiency and renewable energy programs and assess the complex markets in which they operate.” Source: RevenueBase Database · checked Sep 17, 2026
22	American Solar Energy Society	Strong evidence	Boulder, CO, United StatesHQ checked Sep 17, 2026	n/a	48 contacts →
	Strong evidence “The American Solar Energy Society (ASES) is a 501(c)(3) non-profit that advocates for 100% renewable energy and sustainable living by sharing information, events, and resources to…” Source: RevenueBase Database · checked Sep 17, 2026
23	BIG DOG Solar	Strong evidence	Pocatello, ID, United StatesHQ checked Sep 17, 2026	51-200	44 contacts →
	Strong evidence “At Big Dog Solar Energy we specialize in renewable energy, with a core competency in photovoltaics (Residential and Commercial Solar Energy).” Source: RevenueBase Database · checked Sep 17, 2026
24	Orion Renewable Energy Group LLC	Strong evidence	Oakland, CA, United StatesHQ checked Sep 17, 2026	11-50	41 contacts →
	Strong evidence “Orion is a pioneer in the renewable energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
25	Illume Advising	Partial evidence	Madison, WI, United StatesHQ checked Sep 17, 2026	11-50	40 contacts →
	Partial evidence “For decades, E Source has been a trusted partner to utilities navigating an evolving energy landscape.” Source: RevenueBase Database · checked Sep 17, 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: renewable energy research 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 renewable energy research firms.
Partial evidence: Its own public description names part of renewable energy research firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name renewable energy research 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 864 renewable energy research firms based in the United States

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Renewable energy research firms based in the United States at a glance

As of Sep 17, 2026

42.0%Verified-email coverage

14.5Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · New York

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

525

11-50

244

51-200

201-500

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 864 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 renewable energy research 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “renewable energy research 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 renewable energy research 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 renewable energy research firms, 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, 5,275 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 17, 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.

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 renewable energy research 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 renewable energy research firms are there based in the United States?

RevenueBase identified 864 renewable energy research firms 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?

EPRI, headquartered in Palo Alto, tops this list with the largest team on record.

Which city has the most renewable energy research firms?

New York leads with 20 headquartered companies, followed by Houston (19) and Dallas (17).

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 5,275 verified decision-maker contacts tracked across these 864 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 17, 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.