Company lists · Data refreshed September 2026

Top 25 Renewable energy installation companies based in Switzerland

Name: Renewable energy installation companies based in Switzerland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 517 companies tracked

RevenueBase identified 517 renewable energy installation companies headquartered in Switzerland as of September 2026 and tracks 5,654 professional contacts across them, including 2,599 with verified work emails. Zurich is the largest hub.

This list covers renewable energy installation companies headquartered in Switzerland, 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 17, 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 17, 2026 86% judged on-target in blind review

517Companies

5,654Contacts tracked

2,599Verified emails

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The 25 largest renewable energy installation companies based in Switzerland

Ranked by team size

Top 25 of 517 renewable energy installation companies based in Switzerland, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to renewable energy installation 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	OIKEN	Indirect evidence	Sion, SwitzerlandHQ checked Sep 17, 2026	501-1,000	226 contacts →
	Indirect evidence “Avenir activé.” Source: RevenueBase Database · checked Sep 17, 2026
2	Groupe Gruyère Energie	Partial evidence	Bulle, SwitzerlandHQ checked Sep 17, 2026	201-500	157 contacts →
	Partial evidence “Active depuis plus de 130 ans et principal promoteur de la transition énergétique dans la région, Gruyère Energie SA est une entreprise active dans l’approvisionnement et la…” Source: RevenueBase Database · checked Sep 17, 2026
3	Galileo	Partial evidence	Zurich, SwitzerlandHQ checked Sep 17, 2026	51-200	98 contacts →
	Partial evidence “At Galileo, we are delivering long-term green power solutions to energy-hungry customers.” Source: RevenueBase Database · checked Sep 17, 2026
4	Megasol Energie AG	Indirect evidence	Deitingen, SwitzerlandHQ checked Sep 17, 2026	201-500	85 contacts →
	Indirect evidence “Built with cutting-edge technology, economical to operate and easy to install: Solar systems from Megasol combine performance, reliability and appearance - from standardized…” Source: RevenueBase Database · checked Sep 17, 2026
5	Soltop Energie AG	Partial evidence	Elgg, SwitzerlandHQ checked Sep 17, 2026	51-200	84 contacts →
	Partial evidence “Erneuerbare Energien aus Sonne, Erde, Luft und Wasser nutzbar machen: Diese Kernaufgabe erfüllt die Soltop Energie AG bereits seit über 40 Jahren konsequent und erfolgreich.” Source: RevenueBase Database · checked Sep 17, 2026
6	Ciel Electricité SA	Indirect evidence	Lausanne, SwitzerlandHQ checked Sep 17, 2026	51-200	74 contacts →
	Indirect evidence “CIEL est une marque d’Eiffage Énergie Systèmes Suisse.” Source: RevenueBase Database · checked Sep 17, 2026
7	Heim AG Heizsysteme	Partial evidence	Aadorf, SwitzerlandHQ checked Sep 17, 2026	51-200	66 contacts →
	Partial evidence “Seit 1989 begeistern wir unsere Kunden mit massgeschneiderten Lösungen und unvergleichlichen Dienstleistungen im Bereich der erneuerbaren Energien.” Source: RevenueBase Database · checked Sep 17, 2026
8	Solarmarkt	Partial evidence	Aarau, SwitzerlandHQ checked Sep 17, 2026	51-200	64 contacts →
	Partial evidence “35 years ago, Solarmarkt was one of the pioneers in solar energy; today, the company is Switzerland's number one wholesaler of PV components.” Source: RevenueBase Database · checked Sep 17, 2026
9	Thomaslloyd Group	Partial evidence	Stadtkreis 2, SwitzerlandHQ checked Sep 17, 2026	1,001-5,000	62 contacts →
	Partial evidence “Founded in 2003, ThomasLloyd is a vertically integrated sustainable energy and technology solutions provider, integrating development, investment, operations, and technology on a…” Source: RevenueBase Database · checked Sep 17, 2026
10	Elektrizitätswerk Obwalden	Partial evidence	Kerns, SwitzerlandHQ checked Sep 17, 2026	51-200	61 contacts →
	Partial evidence “Als Energiedienstleister und öffentlich-rechtliches Unternehmen versorgt das Elektrizitätswerk Obwalden (EWO) seine Kundinnen und Kunden mit nachhaltigem Strom.” Source: RevenueBase Database · checked Sep 17, 2026
11	Soleol SA	Indirect evidence	Estavayer-le-lac, SwitzerlandHQ checked Sep 17, 2026	51-200	59 contacts →
	Indirect evidence “Soleol SA est une entreprise fribourgeoise basée à Estavayer-le-Lac, spécialisée dans les énergies renouvelables et parmi les leaders en Suisse dans la réalisation et…” Source: RevenueBase Database · checked Sep 17, 2026
12	Renera AG	Strong evidence	Basel, SwitzerlandHQ checked Sep 17, 2026	51-200	54 contacts →
	Strong evidence “Renera AG (formerly Energie Zukunft Schweiz AG) is a leading force on the road to a fully renewable energy world.” Source: RevenueBase Database · checked Sep 17, 2026
13	Planeco Gmbh	Partial evidence	Arlesheim, SwitzerlandHQ checked Sep 17, 2026	51-200	50 contacts →
	Partial evidence “Willkommen bei Planeco GmbH – deiner wegweisenden Partnerin für innovative Energielösungen!” Source: RevenueBase Database · checked Sep 17, 2026
14	EWB Elektrizitäts- UND Wasserwerk DER Stadt Buchs	Partial evidence	Buchs, SwitzerlandHQ checked Sep 17, 2026	51-200	46 contacts →
	Partial evidence “Wir versorgen Buchs mit Energie, Wasser und Kommunikation.” Source: RevenueBase Database · checked Sep 17, 2026
15	Amaudruz SA	Partial evidence	Lausanne, SwitzerlandHQ checked Sep 17, 2026	51-200	39 contacts →
	Partial evidence “Entreprise générale d'installations électriques, Amaudruz SA naît en 1934 sous la direction de Lucien Amaudruz.” Source: RevenueBase Database · checked Sep 17, 2026
16	Clevergie AG	Partial evidence	Wyssachen, SwitzerlandHQ checked Sep 17, 2026	51-200	36 contacts →
	Partial evidence “clevergie konzipiert und baut Erneuerbare-Energie-Anlagen rund erneuerbare Energieanlagen rund um Photovoltaik, Wärmetechnik und E-Mobilität.” Source: RevenueBase Database · checked Sep 17, 2026
17	Edmondo Franchini SA	Partial evidence	Lamone - Lugano, SwitzerlandHQ checked Sep 17, 2026	51-200	35 contacts →
	Partial evidence “La progettazione, l'esecuzione, l'automazione e la riparazione di impianti elettrici a corrente forte e debole e tutte le applicazioni, energie alternative, impianti fotovoltaici…” Source: RevenueBase Database · checked Sep 17, 2026
18	Solexis SA	Strong evidence	Sierre, SwitzerlandHQ checked Sep 17, 2026	11-50	35 contacts →
	Strong evidence “SOLEXIS is a Swiss importer and wholesaler of renewable energy system components, particularly solar system components.” Source: RevenueBase Database · checked Sep 17, 2026
19	Services Plus Energies SA	Partial evidence	Bernex, SwitzerlandHQ checked Sep 17, 2026	51-200	31 contacts →
	Partial evidence “Depuis 15 ans à votre service, Services Plus Energies est une entreprise spécialisée en Chauffage, Ventilation et Climatisation.” Source: RevenueBase Database · checked Sep 17, 2026
20	Ampere Dynamic	Partial evidence	Zurich, SwitzerlandHQ checked Sep 17, 2026	11-50	29 contacts →
	Partial evidence “Als Experte für nachhaltige und schlüsselfertige Energielösungen im Industrie & Gewerbesektor denken wir Energie ganzheitlich.” Source: RevenueBase Database · checked Sep 17, 2026
21	Fu-Gen	Strong evidence	Zurich, SwitzerlandHQ checked Sep 17, 2026	11-50	27 contacts →
	Strong evidence “Fu-Gen is an independent power producer that develops, owns and operates renewable energy sources.” Source: RevenueBase Database · checked Sep 17, 2026
22	Aventron	Indirect evidence	Münchenstein, SwitzerlandHQ checked Sep 17, 2026	11-50	25 contacts →
	Indirect evidence “aventron is a well established green power producer based in Switzerland.” Source: RevenueBase Database · checked Sep 17, 2026
23	Suntechnics Fabrisolar AG	Partial evidence	Effretikon, SwitzerlandHQ checked Sep 17, 2026	51-200	24 contacts →
	Partial evidence “Seit über 40 Jahren dreht sich bei SunTechnics Fabrisolar alles um das Thema erneuerbare Energien.” Source: RevenueBase Database · checked Sep 17, 2026
24	Resiq AG	Indirect evidence	Burgdorf, SwitzerlandHQ checked Sep 17, 2026	11-50	24 contacts →
	Indirect evidence “RESiQ setzt sich für den erfolgreichen Einsatz von erneuerbaren Ressourcen (RES) ein und ermöglicht durch intelligente technische Lösungen (iQ) deren effiziente und nachhaltige…” Source: RevenueBase Database · checked Sep 17, 2026
25	The Meeco Group	Strong evidence	Zug, SwitzerlandHQ checked Sep 17, 2026	51-200	24 contacts →
	Strong evidence “As a leader in clean renewable energy, meeco™ has provided clients with services and solutions for over 423 MW across three continents.” Source: RevenueBase Database · checked Sep 17, 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: renewable energy installation 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 renewable energy installation companies.
Partial evidence: Its own public description names part of renewable energy installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name renewable energy installation 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 517 renewable energy installation companies based in Switzerland

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Renewable energy installation companies based in Switzerland at a glance

As of Sep 17, 2026

46.0%Verified-email coverage

10.9Average contacts per company

1-10Median size (employees)

3.9%Largest-city concentration · Zurich

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

291

11-50

172

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for Switzerland, so it is reported there. Company counts and contact totals on this page are exact for Switzerland, over 517 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 renewable energy installation 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 Switzerland whose own description of what they do matches “renewable energy installation 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 renewable energy installation 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 renewable energy installation companies, and records with no verified work email. Companies headquartered outside Switzerland 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, 2,599 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 17, 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 renewable energy installation 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 renewable energy installation companies are there based in Switzerland?

RevenueBase identified 517 renewable energy installation companies headquartered in Switzerland 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?

OIKEN, headquartered in Sion, tops this list with the largest team on record.

Which city has the most renewable energy installation companies?

Zurich leads with 20 headquartered companies, followed by Lausanne (11) and Zug (11).

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 2,599 verified decision-maker contacts tracked across these 517 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 17, 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.