Company lists · Data refreshed September 2026

Top 25 Renewable energy nonprofits based in the United States

Name: Renewable energy nonprofits 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 1,321 companies tracked

RevenueBase identified 1,321 company matches for renewable energy nonprofits associated with the United States as of September 2026 and tracks 20,433 professional contacts across them, including 6,989 with verified work emails. Washington is the largest hub.

This list covers company matches for renewable energy nonprofits 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 September 17, 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 Sep 17, 2026 How this list was built

1,321Companies

20,433Contacts tracked

6,989Verified emails

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The 25 largest renewable energy nonprofits based in the United States

Ranked by team size

Top 25 of 1,321 company matches for renewable energy nonprofits based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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	Powur, PBC	Exact match	San Diego, United StatesHQ recorded Sep 17, 2026	n/a	1,199 contacts →
	Exact match “The Powur Mission: Accelerate the adoption of clean energy worldwide We're empowering our community of homeowners and advisors to thrive in the global shift to sustainable energy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Community Dreams Foundation	Exact match	Orlando, FL, United StatesHQ recorded Sep 17, 2026	1,001-5,000	1,009 contacts →
	Exact match “We are a purpose-driven organization focused on empowering communities through clean energy, technology innovation, and collaborative partnerships.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	RMI	Exact match	Boulder, CA, United StatesHQ recorded Sep 17, 2026	501-1,000	830 contacts →
	Exact match “Rocky Mountain Institute (RMI) is an independent, nonpartisan nonprofit founded in 1982 that transforms global energy systems through market-driven solutions to secure a…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Grid Alternatives	Exact match	Oakland, CA, United StatesHQ recorded Sep 17, 2026	201-500	731 contacts →
	Exact match “GRID Alternatives is a national leader in bringing affordable solar power, clean mobility, and energy storage to underserved communities while creating pathways to life-changing…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Apex Clean Energy	Exact match	Charlottesville, VA, United StatesHQ recorded Sep 17, 2026	201-500	594 contacts →
	Exact match “Apex Clean Energy was founded with a singular focus: to accelerate the shift to clean energy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Center For Sustainable Energy CSE	Exact match	San Diego, CA, United StatesHQ recorded Sep 17, 2026	201-500	259 contacts →
	Exact match “Center for Sustainable Energy® (CSE) is a national nonprofit that accelerates adoption of clean transportation and distributed energy through effective and equitable program…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Energy Trust Of Oregon	Exact match	Portland, OR, United StatesHQ recorded Sep 17, 2026	51-200	254 contacts →
	Exact match “Energy Trust of Oregon is an independent nonprofit organization dedicated to helping utility customers benefit from saving energy and generating renewable power.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Better Earth	Exact match	Tampa, FL, United StatesHQ recorded Sep 17, 2026	201-500	244 contacts →
	Exact match “We are creating a more sustainable and better earth through solar energy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Richard Heath & Associates, Inc. RHA	Exact match	Fresno, CA, United StatesHQ recorded Sep 17, 2026	501-1,000	230 contacts →
	Exact match “Now part of Resource Innovations, RHA will expand its team to over 1,100 professionals, broadening expertise and offering clients additional solutions in energy storage and…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Energy & Environmental Research Center	Exact match	Grand Forks, ND, United StatesHQ recorded Sep 17, 2026	201-500	213 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Center For Energy And Environment	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 17, 2026	51-200	203 contacts →
	Exact match “CEE is a community-based clean energy nonprofit with special expertise in energy efficiency that stretches back 40 years.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Ever-Green Energy	Exact match	St. Paul, MN, United StatesHQ recorded Sep 17, 2026	201-500	191 contacts →
	Exact match “Ever-Green Energy is a recognized leader in energy conservation and the use of renewable energy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	SOL Systems	Exact match	Washington, DC, United StatesHQ recorded Sep 17, 2026	51-200	189 contacts →
	Exact match “Sol Systems is a national clean energy firm focused on building domestic energy that benefits local communities.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Clean AIR Task Force	Exact match	Boston, MA, United StatesHQ recorded Sep 17, 2026	51-200	167 contacts →
	Exact match “CATF advocates for the change in technologies and policies needed to get to a zero-emissions, high-energy planet at an affordable cost.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Breakthrough Energy	Exact match	Kirkland, United StatesHQ recorded Sep 17, 2026	51-200	159 contacts →
	Exact match “Breakthrough Energy backs companies developing the next generation of clean energy solutions.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Infinity Solar USA	Exact match	Vancouver, WA, United StatesHQ recorded Sep 17, 2026	51-200	158 contacts →
	Exact match “Preserve, protect, and improve the environment in the US with Solar.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	smartenergy.com	Exact match	New York, NY, United StatesHQ recorded Sep 17, 2026	51-200	152 contacts →
	Exact match “We believe the future of energy is green and it is our mission to make green energy affordable for everyone.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	U.S. Energy Foundation	Exact match	San Francisco, CA, United StatesHQ recorded Sep 17, 2026	51-200	150 contacts →
	Exact match “U.S.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Slipstream	Exact match	Madison, WI, United StatesHQ recorded Sep 17, 2026	51-200	146 contacts →
	Exact match “We're a nonprofit headquartered in Madison, WI with an office in Chicago and remote staff across the U.S.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Solgen Power	Exact match	Pasco, WA, United StatesHQ recorded Sep 17, 2026	1,001-5,000	146 contacts →
	Exact match “Solgen Power provides an excellent Solar experience for homeowners in Washington State, Oregon, Idaho, Ohio, Kentucky, Indiana, Arizona, and Texas.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Ecology Action	Exact match	Santa Cruz, CA, United StatesHQ recorded Sep 17, 2026	51-200	140 contacts →
	Exact match “Ecology Action is an award-winning California 501(c)(3) non-profit that’s been inspiring sustainable community actions since 1970.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	NEW Energy Nexus	Exact match	Berkeley, CA, United StatesHQ recorded Sep 17, 2026	51-200	136 contacts →
	Exact match “New Energy Nexus (NEX) is the world's leading ecosystem of funds and accelerators supporting diverse clean energy entrepreneurs to thrive, from emerging tech through to clean…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	The Energy Coalition	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 17, 2026	51-200	128 contacts →
	Exact match “The Energy Coalition (TEC) is a California-based nonprofit 501(c)3 organization.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	SEI	Exact match	San Rafael, CA, United StatesHQ recorded Sep 17, 2026	51-200	127 contacts →
	Exact match “SEI is an environmental nonprofit that builds leaders to accelerate climate solutions.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Solar United Neighbors	Exact match	Washington, DC, United StatesHQ recorded Sep 17, 2026	51-200	126 contacts →
	Exact match “Solar United Neighbors (SUN) is a national nonprofit organization helping people go solar, join together, and fight for their energy rights.” Recorded in the RevenueBase company graph · Sep 17, 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 “renewable energy nonprofits”. 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 1,321 renewable energy nonprofits based in the United States

See the full list, filter by size, metro and specialty, and access 6,989 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Renewable energy nonprofits based in the United States at a glance

As of Sep 17, 2026

34.2%Verified-email coverage

15.5Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · Washington

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

787

11-50

375

51-200

121

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 1,321 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 “renewable energy nonprofits” 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 6,989 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 September 17, 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.

Renewable energy nonprofits 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 “renewable energy nonprofits”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many renewable energy nonprofits are there based in the United States?

RevenueBase identified 1,321 company matches for renewable energy nonprofits associated with the United States as of September 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?

Powur, PBC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most renewable energy nonprofits?

Washington leads with 41 company records, followed by New York (39) and Austin (26).

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 6,989 professional contacts with verified work emails tracked across these 1,321 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 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 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.