Company lists · Data refreshed September 2026
Top 25 Tandem solar cell companies based in the United States
RevenueBase identified 94 tandem solar cell companies headquartered in the United States as of September 2026 and tracks 8,133 professional contacts across them, including 2,137 with verified work emails. San Francisco is the largest hub.
This list covers tandem solar cell companies 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 19, 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.
The 25 largest tandem solar cell companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 5,581 contacts → | ||||
Partial evidence “First Solar, Inc.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 315 contacts → | ||||
Partial evidence “Illuminate USA is an American leader in advanced clean energy manufacturing, dedicated to delivering cutting-edge solar panel technology and sustainable energy solutions.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 151 contacts → | ||||
Indirect evidence “Solyndra designs and manufactures photovoltaic systems, comprised of panels and mounting hardware, for the commercial rooftop market.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 137 contacts → | ||||
Strong evidence “Spectrolab, Inc, a wholly owned subsidiary of The Boeing Company, is the world's leading merchant supplier of the Highest-Efficiency Multijunction Solar Cells for Spacecraft Power…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 91 contacts → | ||||
Strong evidence “MiaSolé is a producer of lightweight, flexible and power solar cells.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 86 contacts → | ||||
Partial evidence “Founded in 2021, SEG is a leading vertically integrated PV manufacturer headquartered in Houston, Texas, U.S, and is dedicated to delivering reliable and cost-effective solar…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 80 contacts → | ||||
Indirect evidence “We bring together 40 years of R&D, 15 years of manufacturing, numerous awards and extensive patent protection to cement our leadership as the leading provider of CIGS thin-film…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 78 contacts → | ||||
Partial evidence “Waaree is a global leader in solar energy, boasting the largest presence outside of China.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 63 contacts → | ||||
Partial evidence “Founded in 1996, Global Solar Energy,® Inc (GSE) has evolved into a leading manufacturer of thin-film CIGS (Copper Indium Gallium diSelenide) solar solutions, with more flexible…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 49 contacts → | ||||
Strong evidence “Swift Solar is transforming solar energy with groundbreaking perovskite tandem technology.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 33 contacts → | ||||
Strong evidence “Tandem PV, based in Silicon Valley and founded in 2016, is driving the transition to a net-zero economy by developing state-of-the-art perovskite-based solar panels.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 29 contacts → | ||||
Partial evidence “EMC is the global leader in the development of high-speed roll-to-roll printing of configurable, high performance solar PV material and products.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 22 contacts → | ||||
Indirect evidence “COOLPV is here!” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 15 contacts → | ||||
Strong evidence “mPower is shaping the future of solar with a revolutionary new technology called DragonSCALES, a completely flexible, interconnected mesh of miniature solar cells.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 13 contacts → | ||||
Indirect evidence “Andluca's mission is to modernize the role of windows and skylights in homes and buildings, fostering smarter, more sustainable living environments.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 12 contacts → | ||||
Partial evidence “At Active Surfaces, we are on a mission to redefine solar energy's role in combating climate change by unlocking vast solar potential where it was previously unimaginable.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 12 contacts → | ||||
Indirect evidence “Ubiquitous Energy is the world leader in transparent photovoltaics.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 9 contacts → | ||||
Partial evidence “Thin-film and flexible solar panels that can conform to many different structures while performing at a competitive efficiency.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 8 contacts → | ||||
Partial evidence “Our ClearPower photovoltaic window technology is totally transparent yet generates electricity with power approaching that of a high-efficiency (but opaque) solar module.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 7 contacts → | ||||
Partial evidence “We lead the way in bifacial solar solutions.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 5 contacts → | ||||
Partial evidence “PeroNova is redefining solar with next-generation perovskite technology, bringing powerful, flexible, and sustainable energy solutions to buildings, grids, and even space.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 5 contacts → | ||||
Partial evidence “As a pioneer in solar, AXITEC dedicates itself to implementing the newest advances in manufacturing of solar modules.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 5 contacts → | ||||
Indirect evidence “Beyond Silicon is a U.S.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 4 contacts → | ||||
Partial evidence “APT Solar Solutions is building the "Arduino of Power." Our patented technology is a scalable, off-grid, stand-alone solar platform designed to bypass the 6-month permitting…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 3 contacts → | ||||
Indirect evidence “Powered by Sunpower” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
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: tandem solar cell companies. 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 tandem solar cell companies.
- Partial evidence
- Its own public description names part of tandem solar cell companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name tandem solar cell companies. 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 94 tandem solar cell companies based in the United States
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Tandem solar cell companies based in the United States at a glance
As of Sep 19, 2026Companies by employee count
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 94 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 tandem solar cell companies, 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 “tandem solar cell companies”. 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 tandem solar cell companies), 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 tandem solar cell companies, 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, 2,137 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 19, 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 tandem solar cell companies, 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 tandem solar cell companies are there based in the United States?
RevenueBase identified 94 tandem solar cell companies 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?
First Solar, headquartered in Tempe, tops this list with the largest team on record.
Which city has the most tandem solar cell companies?
San Francisco leads with 4 headquartered companies, followed by San Jose (4) and Fremont (3).
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 2,137 verified decision-maker contacts tracked across these 94 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 19, 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.
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