Company lists · Data refreshed September 2026

Top 25 Solar developers based in Washington, United States

Name: Solar developers based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 52 companies tracked

RevenueBase identified 52 solar developers headquartered in Washington, United States as of September 2026 and tracks 1,299 professional contacts across them, including 429 with verified work emails. New York is the largest hub.

This list covers solar developers headquartered in Washington, 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

52Companies

1,299Contacts tracked

429Verified emails

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The 25 largest solar developers based in Washington, United States

Ranked by team size

Top 25 of 52 solar developers based in Washington, 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 developers: 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	Solar Energy Industries Association	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	51-200	457 contacts →
	Partial evidence “The Solar Energy Industries Association (SEIA®) is leading the transformation to a clean energy economy.” Source: RevenueBase Database · checked Sep 18, 2026
2	SOL Systems	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	51-200	189 contacts →
	Indirect evidence “Sol Systems is a national clean energy firm focused on building domestic energy that benefits local communities.” Source: RevenueBase Database · checked Sep 18, 2026
3	Solar United Neighbors	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	51-200	126 contacts →
	Partial evidence “Solar United Neighbors (SUN) is a national nonprofit organization helping people go solar, join together, and fight for their energy rights.” Source: RevenueBase Database · checked Sep 18, 2026
4	Solar Solution	Strong evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	43 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 18, 2026
5	NEW Columbia Solar	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	51-200	41 contacts →
	Partial evidence “New Columbia Solar (NCS) is a full-service solar energy company, based in and serving the District of Columbia.” Source: RevenueBase Database · checked Sep 18, 2026
6	Coalition For Community Solar Access	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	24 contacts →
	Partial evidence “The Coalition for Community Solar Access (CCSA) is a national trade association comprised of businesses, non-profits, and community leaders at every level of the solar industry.” Source: RevenueBase Database · checked Sep 18, 2026
7	Uprise Solar And Roofing	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	19 contacts →
	Partial evidence “Uprise Solar and Roofing is a Washington, DC–based solar and roofing company serving DC, Maryland, and Northern Virginia.” Source: RevenueBase Database · checked Sep 18, 2026
8	Ipsun Solar	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	51-200	17 contacts →
	Partial evidence “Ipsun Solar, a Civic Renewables Company, is a leader in clean energy services based in Virginia, Washington D.C.” Source: RevenueBase Database · checked Sep 18, 2026
9	Sustainable YOU	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	51-200	14 contacts →
	Partial evidence “Sustainable You is a national strategic consulting firm in solar and sustainability serving residential and small commercial clients with a focus in the DC, Maryland and Virginia…” Source: RevenueBase Database · checked Sep 18, 2026
10	Prism Solar	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	12 contacts →
	Partial evidence “Based in Washington, DC, Prism Solar specializes in originating, financing, and developing solar projects.” Source: RevenueBase Database · checked Sep 18, 2026
11	Distributed SUN	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	11 contacts →
	Indirect evidence “Distributed Sun LLC (DSUN) is a renewable energy services provider founded in 2009.” Source: RevenueBase Database · checked Sep 18, 2026
12	Universal Renewables	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	10 contacts →
	Partial evidence “Universal Renewables has revolutionized rooftop solar installations by making solar power systems possible and economical in ways that traditional ballasted and flush-mount…” Source: RevenueBase Database · checked Sep 18, 2026
13	Sunvoy	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	9 contacts →
	Partial evidence “Sunvoy is the first and only solar customer portal and fleet management platform built by an active solar installer, for solar installers.” Source: RevenueBase Database · checked Sep 18, 2026
14	Solar Energy Manufacturers For America Sema Coalition	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	9 contacts →
	Partial evidence “The Solar Energy Manufacturers for America (SEMA) Coalition is a diverse group of non-Chinese solar manufacturers united to rebuild the domestic supply chain.” Source: RevenueBase Database · checked Sep 18, 2026
15	Solar Electric Light Fund Self	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	51-200	9 contacts →
	Partial evidence “The Solar Electric Light Fund (SELF) uses the power of the sun to fight poverty and climate change.” Source: RevenueBase Database · checked Sep 18, 2026
16	Volt Energy Utility	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	8 contacts →
	Partial evidence “From Appalachia to Atlanta, Volt Energy Utility’s solar projects make a difference.” Source: RevenueBase Database · checked Sep 18, 2026
17	Okovate Sustainable Energy	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	8 contacts →
	Partial evidence “Agrivoltaics is a type of dual-use solar deployment that optimizes land use for both solar photovoltaic energy generation and agriculture production.” Source: RevenueBase Database · checked Sep 18, 2026
18	Earthspark International	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	11-50	6 contacts →
	Indirect evidence “EarthSpark International is a non-profit incubator for strategies to deliver high-quality energy services to under-served communities.” Source: RevenueBase Database · checked Sep 18, 2026
19	Chesapeake Solar & Storage Association	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	5 contacts →
	Partial evidence “Founded in 1984, CHESSA represents the interests of manufacturers, installers, distributors and component suppliers in the solar and energy storage industries serving Maryland…” Source: RevenueBase Database · checked Sep 18, 2026
20	Lightbox Energy	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	4 contacts →
	Indirect evidence “Lightbox Energy is an energy and sustainability program management firm.” Source: RevenueBase Database · checked Sep 18, 2026
21	NEW Partners Community Solar	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	3 contacts →
	Partial evidence “New Partners Community Solar is a 501(c)(3) non-profit organization, dedicated to clean energy and environmental justice.” Source: RevenueBase Database · checked Sep 18, 2026
22	Pipe Solar	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	3 contacts →
	Partial evidence “Pipe Solar simplifies the process of PV design, proposal generation, and integrated financing to provide a robust point-of-sale experience for solar customers.” Source: RevenueBase Database · checked Sep 18, 2026
23	Smartr Solar	Partial evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	2 contacts →
	Partial evidence “At Smartr Solar, our mission is "to make the money-saving benefits of solar power accessible to tenants by making solar power a great investment for their landlords." True to our…” Source: RevenueBase Database · checked Sep 18, 2026
24	Vittoria Energy Expedition	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	2 contacts →
	Indirect evidence “Vittoria Energy Expedition is a 501(c)(3) nonprofit founded in 2015 to connect everyday people to clean power innovations.” Source: RevenueBase Database · checked Sep 18, 2026
25	Youth Power Ventures	Indirect evidence	Washington, DC, United StatesHQ checked Sep 18, 2026	1-10	2 contacts →
	Indirect evidence “Youth Power Ventures intersects renewable energy and social impact.” 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 developers. 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 developers.
Partial evidence: Its own public description names part of solar developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name solar developers. 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 52 solar developers based in Washington, United States

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Solar developers based in Washington, United States at a glance

As of Sep 18, 2026

33.0%Verified-email coverage

25.0Average contacts per company

1-10Median size (employees)

296.2%Largest-city concentration · New York

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 52 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 developers, 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 Washington, United States whose own description of what they do matches “solar developers”. 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 developers), 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 developers, and records with no verified work email. Companies headquartered outside Washington 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, 429 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 developers by metro in the United States

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 developers, 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 developers are there based in Washington, United States?

RevenueBase identified 52 solar developers headquartered in Washington, 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?

Solar Energy Industries Association, headquartered in Washington, tops this list with the largest team on record.

Which city has the most solar developers?

New York leads with 154 headquartered companies, followed by San Diego (137) and Houston (136).

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 429 verified decision-maker contacts tracked across these 52 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.