Company lists · Data refreshed September 2026

Top 19 Solar energy consulting firms based in San Francisco, United States

RevenueBase identified 52 solar energy consulting firms headquartered in San Francisco, United States as of September 2026 and tracks 471 professional contacts across them, including 229 with verified work emails. Across the United States, Houston is the largest hub for this category (140 companies); San Francisco has 52.

This list covers solar energy consulting firms headquartered in San Francisco, 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 29, 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 29, 2026 86% judged on-target in blind review
52Companies
471Contacts tracked
229Verified emails
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The 19 largest solar energy consulting firms based in San Francisco, United States

Ranked by team size
Top 19 of 52 solar energy consulting firms based in San Francisco, United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to solar energy consulting 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 202651-200156 contacts →

Partial evidence

“Energy.”

Source: RevenueBase Database · checked Sep 29, 2026
2Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 202611-5045 contacts →

Partial evidence

“At Clean Energy Counsel, we devote our legal power to advancing clean energy and a sustainable future.”

Source: RevenueBase Database · checked Sep 29, 2026
3Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 202651-20032 contacts →

Partial evidence

“Luminalt designs, installs, and maintains premium solar electric systems for residential, commercial, and non-profit customers in the San Francisco Bay Area.”

Source: RevenueBase Database · checked Sep 29, 2026
4Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 202611-5026 contacts →

Indirect evidence

“OnSwitch, Inc.”

Source: RevenueBase Database · checked Sep 29, 2026
5Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 202611-5024 contacts →

Strong evidence

“Lumen Energy is the modern solar broker.”

Source: RevenueBase Database · checked Sep 29, 2026
6Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 202611-5019 contacts →

Partial evidence

“Skytech Solar is one of the best solar companies in the San Francisco Bay Area.”

Source: RevenueBase Database · checked Sep 29, 2026
7Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 202611-5012 contacts →

Partial evidence

“SolarUnion is Silicon Valley’s leading provider of premium solar solutions for homeowners, businesses and non-profits.”

Source: RevenueBase Database · checked Sep 29, 2026
8Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 202611-5011 contacts →

Partial evidence

“TerraVerde is an independent energy advisor representing school districts, public agencies, and commercial enterprises.”

Source: RevenueBase Database · checked Sep 29, 2026
9Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 202611-5010 contacts →

Partial evidence

“Sutro Power is a San Francisco-based team of Solar Installation Professionals.”

Source: RevenueBase Database · checked Sep 29, 2026
10Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 202611-509 contacts →

Partial evidence

“Cleantech Law Partners is a full-service law firm dedicated exclusively to the renewable energy industry.”

Source: RevenueBase Database · checked Sep 29, 2026
11Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 202611-508 contacts →

Partial evidence

“Energy Resource Integration (ERI) is a private energy engineering firm founded in 2011 on the West Coast to help companies develop sustainability through energy efficiency -…”

Source: RevenueBase Database · checked Sep 29, 2026
12Strong evidenceSan Francisco, United StatesHQ checked Sep 29, 20261-106 contacts →

Strong evidence

“Trendline Insights provides reliable data analysis based on 60+ years of wind, solar, and energy storage systems experience.”

Source: RevenueBase Database · checked Sep 29, 2026
13Indirect evidenceSan Francisco, United StatesHQ checked Sep 29, 20261-106 contacts →

Indirect evidence

“Albion Power Company offers turn-key Design/Build installations.”

Source: RevenueBase Database · checked Sep 29, 2026
14Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 202611-505 contacts →

Strong evidence

“Oxypower, Inc.(DBA Occidental Power Solar & Cogen) is San Francisco's oldest solar electric company, providing the Bay Area with custom design and build solar energy systems for…”

Source: RevenueBase Database · checked Sep 29, 2026
15Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 202611-505 contacts →

Indirect evidence

“Berkeley Applied Science & Engineering, Inc.”

Source: RevenueBase Database · checked Sep 29, 2026
16Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 20261-103 contacts →

Partial evidence

“At Deep Green Solar we want to help build a stronger and sustainable economy.”

Source: RevenueBase Database · checked Sep 29, 2026
17Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 20261-102 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 29, 2026
18Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 29, 20261-101 contacts →

Partial evidence

“Founded by #Solar100 thought leader Tor "Solar Fred" Valenza, UnThink Solar is a leading public relations, content, and branding firm for B2B and B2C solar, storage, and cleantech…”

Source: RevenueBase Database · checked Sep 29, 2026
19Strong evidenceSan Francisco, United StatesHQ checked Sep 29, 20261-101 contacts →

Strong evidence

“AHC provides advisory and consulting services in clean energy and transportation.”

Source: RevenueBase Database · checked Sep 29, 2026

Showing 19 of 52 solar energy consulting firms based in San Francisco, United States

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Solar energy consulting firms based in San Francisco, United States at a glance

As of Sep 29, 2026
48.6%Verified-email coverage
9.1Average contacts per company
1-10Median size (employees)
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
28
11-50
20
51-200
3
201-500
1

Email recency for this list is measured across the whole United States list rather than for San Francisco, so it is reported there. Company counts and contact totals on this page are exact for San Francisco, 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 energy consulting 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 San Francisco, United States whose own description of what they do matches “solar energy consulting 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 solar energy consulting 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 solar energy consulting firms, and records with no verified work email. Companies headquartered outside San Francisco 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, 229 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 29, 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 solar energy consulting 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 solar energy consulting firms are there based in San Francisco, United States?

RevenueBase identified 52 solar energy consulting firms headquartered in San Francisco, 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?

Energy And Environmental Economics, INC, headquartered in San Francisco, tops this list with the largest team on record.

Which city in the United States has the most solar energy consulting firms?

Houston leads the United States with 140 headquartered companies, followed by New York (131) and San Diego (106). San Francisco has 52.

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 229 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 29, 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.