Company lists · Data refreshed September 2026

Top 22 Energy transition companies based in Washington, United States

Name: Energy transition companies based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 15, 2026 37 companies tracked

RevenueBase identified 37 company matches for energy transition companies associated with Washington, United States as of September 2026 and tracks 792 professional contacts across them, including 292 with verified work emails. Across the United States, New York is the largest hub for this category (137 companies); Washington has 37.

This list covers company matches for energy transition companies associated with Washington, 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 15, 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 15, 2026 How this list was built

37Companies

792Contacts tracked

292Verified emails

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The 22 largest energy transition companies based in Washington, United States

Ranked by team size

Top 22 of 37 company matches for energy transition companies based in Washington, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 15, 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	Genser Energy	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	201-500	311 contacts →
	Exact match “Powering the future of Africa, sustainably.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
2	SOL Systems	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 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 15, 2026 · View company records in RevenueBase
3	Solar Solution	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	11-50	43 contacts →
	Exact match “Solar Solution, based in Washington D.C, was founded in 2008 and has grown to become one of the largest solar PV installers and developers in the region.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
4	Groundswell, INC	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	11-50	42 contacts →
	Exact match “Groundswell builds community power to strengthen local resilience for everyone and cut electricity bills in half for our neighbors who need savings the most.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
5	NEW Columbia Solar	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	51-200	41 contacts →
	Exact match “New Columbia Solar (NCS) is a full-service solar energy company, based in and serving the District of Columbia.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
6	Zoetic Global	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	11-50	18 contacts →
	Exact match “At Zoetic Global, our mission is to revolutionize the energy sector through innovative solutions that unleash the power of renewable resources.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
7	Ipsun Solar	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	51-200	17 contacts →
	Exact match “Ipsun Solar, a Civic Renewables Company, is a leader in clean energy services based in Virginia, Washington D.C.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
8	Prism Solar	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	11-50	12 contacts →
	Exact match “Based in Washington, DC, Prism Solar specializes in originating, financing, and developing solar projects.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
9	Distributed SUN	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	11-50	11 contacts →
	Exact match “Distributed Sun LLC (DSUN) is a renewable energy services provider founded in 2009.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
10	Solar Electric Light Fund Self	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	51-200	9 contacts →
	Exact match “The Solar Electric Light Fund (SELF) uses the power of the sun to fight poverty and climate change.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
11	Volt Energy Utility	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	11-50	8 contacts →
	Exact match “From Appalachia to Atlanta, Volt Energy Utility’s solar projects make a difference.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
12	Technology Transition Corporation	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	1-10	5 contacts →
	Exact match “TTC grows clean energy industries.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
13	Lightbox Energy	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	1-10	4 contacts →
	Exact match “Lightbox Energy is an energy and sustainability program management firm.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
14	Range Renewables	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	1-10	4 contacts →
	Exact match “Range Renewable Advisors (“Range” or “Range Renewables”) is a renewable energy advisory firm focused on helping clients tackle complex financial solutions in development, project…” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
15	Sustainable Energy Services International	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	1-10	3 contacts →
	Exact match “Renewable Energy Solutions for Remote and Developing Countries” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
16	NEW Partners Community Solar	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	1-10	3 contacts →
	Exact match “New Partners Community Solar is a 501(c)(3) non-profit organization, dedicated to clean energy and environmental justice.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
17	Vittoria Energy Expedition	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	1-10	2 contacts →
	Exact match “Vittoria Energy Expedition is a 501(c)(3) nonprofit founded in 2015 to connect everyday people to clean power innovations.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
18	Marstecs	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	1-10	2 contacts →
	Exact match “Marstecs exists to develop truly clean, truly green, sustainable, and cheap energy focusing on Green Hydrogen, Green Zero Energy Air Conditioning, Green Vortex Hydroelectric Power…” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
19	Evergreen Energy Investments	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	1-10	2 contacts →
	Exact match “Evergreen Energy Investments is a dynamic energy company headquartered in Washington, DC.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
20	Renewables Forward	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	51-200	1 contacts →
	Exact match “The transition to an economy powered by clean energy is under way.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
21	Flywheel Development LLC	Exact match	Washington, United StatesHQ recorded Sep 15, 2026	1-10	1 contacts →
	Exact match “Flywheel Development was founded in 2014 and is a leading sustainable urban design and development company in the Washington DC region.” Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
22	Point Energy	Exact match	Washington, DC, United StatesHQ recorded Sep 15, 2026	1-10	1 contacts →
	Exact match “Point Energy is a highly specialized and agile end-to-end strategic consultancy and operator in all aspects of the renewable energy industry.” Recorded in the RevenueBase company graph · Sep 15, 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 “energy transition companies”. 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 22 of 37 energy transition companies based in Washington, United States

See the full list, filter by size, metro and specialty, and access 292 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Energy transition companies based in Washington, United States at a glance

As of Sep 15, 2026

36.9%Verified-email coverage

21.4Average contacts per company

11-50Median size (employees)

Sep 15, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 37 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 Washington, United States whose business descriptions match “energy transition companies” 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 292 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 15, 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.

Energy transition companies by metro in the United States

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

How many energy transition companies are there based in Washington, United States?

RevenueBase identified 37 company matches for energy transition companies associated with Washington, 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?

Genser Energy tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most energy transition companies?

New York leads the United States with 137 company records, followed by Houston (126) and Austin (78). Washington has 37.

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 292 professional contacts with verified work emails tracked across these 37 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 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 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.