Company lists · Data refreshed September 2026

Top 16 Solar thermal power companies based in Germany

RevenueBase identified 57 solar thermal power companies headquartered in Germany as of September 2026 and tracks 244 professional contacts across them, including 67 with verified work emails. Berlin is the largest hub.

This list covers solar thermal power companies headquartered in Germany, 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 16, 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 16, 2026 86% judged on-target in blind review
57Companies
244Contacts tracked
67Verified emails
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The 16 largest solar thermal power companies based in Germany

Ranked by team size
Top 16 of 57 solar thermal power companies based in Germany, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to solar thermal power companies: 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 evidenceDettenhausen, GermanyHQ checked Sep 16, 202651-20030 contacts →

Partial evidence

“Ritter XL Solar steht für Hochleistungs-Solarthermie im Groß­format.”

Source: RevenueBase Database · checked Sep 16, 2026
2Strong evidenceKarlsruhe, GermanyHQ checked Sep 16, 202611-5022 contacts →

Strong evidence

“FRENELL delivers proven, cost-efficient Concentrated Solar Power (CSP) with integrated energy storage based on linear Fresnel Collectors.”

Source: RevenueBase Database · checked Sep 16, 2026
3Indirect evidenceMoosburg, GermanyHQ checked Sep 16, 202651-20018 contacts →

Indirect evidence

“CitrinSolar steht für hochwertige Solarthermie- und Photovoltaikanlagen sowie Wärmespeichersysteme.”

Source: RevenueBase Database · checked Sep 16, 2026
4Partial evidenceFreiburg Im Breisgau, GermanyHQ checked Sep 16, 202611-5018 contacts →

Partial evidence

“iAccess Energy develops, engineers, constructs and finances turnkey photovoltaic power plants in Germany since 2004, in France and the US since 2010.”

Source: RevenueBase Database · checked Sep 16, 2026
5Strong evidenceBerlin, GermanyHQ checked Sep 16, 202611-5011 contacts →

Strong evidence

“The core business of CLERE AG is the acquisition and operation of solar power plants in Europe.”

Source: RevenueBase Database · checked Sep 16, 2026
6Strong evidenceSaarbrucken, GermanyHQ checked Sep 16, 2026201-5009 contacts →

Strong evidence

“The Greencells Group is a company specializing in the development, financing and construction of solar power plants worldwide.”

Source: RevenueBase Database · checked Sep 16, 2026
7Partial evidenceLangenfeld, GermanyHQ checked Sep 16, 20261-107 contacts →

Partial evidence

“Unsere innovativen Solarsysteme heben die Effizienz auf ein neues Niveau, indem sie nicht nur Sonnenlicht in Energie umwandeln, sondern auch die dabei entstehende Wärme thermisch…”

Source: RevenueBase Database · checked Sep 16, 2026
8Partial evidenceHamburg, GermanyHQ checked Sep 16, 202611-506 contacts →

Partial evidence

Solar-konzept ist ein bundesweit agierendes, mittelständisches Unternehmen mit 20 Jahren Erfahrung in der Entwicklung, dem Bau und dem Betrieb von großen Photovoltaik-Anlagen.”

Source: RevenueBase Database · checked Sep 16, 2026
9Partial evidenceNettetal, GermanyHQ checked Sep 16, 202651-2005 contacts →

Partial evidence

“Unser Ziel ist es, unseren Kunden eine thermische Solaranlage anzubieten, die nicht nur höchste Qualitätsansprüche erfüllt, sondern sich finanziell auch in einem Zeitraum von…”

Source: RevenueBase Database · checked Sep 16, 2026
10Indirect evidenceBindlach, GermanyHQ checked Sep 16, 202611-502 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 16, 2026
11Indirect evidenceBerlin, GermanyHQ checked Sep 16, 20261-102 contacts →

Indirect evidence

“Wir sind bekannt für eine professionelle und verantwortungsbewusste Projektumsetzung, langfristige und gute Investorenbeziehungen sowie ein hohes Qualitätsniveau unserer…”

Source: RevenueBase Database · checked Sep 16, 2026
12Indirect evidenceMannheim, GermanyHQ checked Sep 16, 20261-102 contacts →

Indirect evidence

“Eine moderne und nachhaltige Gesellschaft fußt auf einer modernen und nachhaltigen Energieversorgung.”

Source: RevenueBase Database · checked Sep 16, 2026
13Indirect evidenceHeilbronn, GermanyHQ checked Sep 16, 20261-102 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 16, 2026
14Indirect evidenceWaren, GermanyHQ checked Sep 16, 20261-102 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 16, 2026
15Indirect evidenceKöthen (anhalt), GermanyHQ checked Sep 16, 20261-102 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 16, 2026
16Partial evidenceAllensbach, GermanyHQ checked Sep 16, 20261-101 contacts →

Partial evidence

Solar Bumler GmbH is a company based out of Allensbach, Germany.”

Source: RevenueBase Database · checked Sep 16, 2026

Showing 16 of 57 solar thermal power companies based in Germany

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Solar thermal power companies based in Germany at a glance

As of Sep 16, 2026
27.5%Verified-email coverage
4.3Average contacts per company
1-10Median size (employees)
8.8%Largest-city concentration · Berlin
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
28
11-50
17
51-200
5
201-500
3

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 57 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 thermal power 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 Germany whose own description of what they do matches “solar thermal power 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 solar thermal power 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 solar thermal power companies, and records with no verified work email. Companies headquartered outside Germany 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, 67 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 16, 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 thermal power 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 solar thermal power companies are there based in Germany?

RevenueBase identified 57 solar thermal power companies headquartered in Germany 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?

Ritter XL Solar, headquartered in Dettenhausen Wurttemberg, tops this list with the largest team on record.

Which city has the most solar thermal power companies?

Berlin leads with 5 headquartered companies, followed by Freiburg Im Breisgau (2) and Hamburg (2).

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 67 verified decision-maker contacts tracked across these 57 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 16, 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.