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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint744,173 companies indexed · Last updated: today
DirectoryEnergy & Environment

Energy & Environment

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IndustryEnergy & Environment
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Matching companies

9'016 companies found

ESP-Hotz GmbH Logo

ESP-Hotz GmbH 

Oberägeri · Since 2014

The core activity of ESP-Hotz GmbH is the provision of services in the field of electrical engineering, particularly in the areas of: * Photovoltaic systems * Electrical inspections (periodic electrical inspections, electrical inspections of all kinds) * Consulting and expert opinions (independent customer consulting and expert opinions in electrical matters) * Device testing (testing of electrical devices) * Network analysis and load measurement (conducting network analysis in case of network fluctuations, flicker, transients or load measurement in buildings) * Thermography Thus, the company offers a wide range of services in the field of electrical engineering, from planning and installation of photovoltaic systems to maintenance and testing of electrical systems and devices.

Solar & Photovoltaics
View profile5(2)
Etark, Inh. Müller Logo

Etark, Inh. Müller 

Buch Am Irchel · Since 2021

The core activity of etark.ch is the consulting, sales and brokerage of sustainable solar special solutions, in particular products such as Platio Solar floor tiles, Smartflower and Suncatcher, as well as the clarification of building permits and funding for customers in Switzerland.

Solar & Photovoltaics
View profile5(2)
E Tec-Elektro GmbH Logo

E Tec-Elektro GmbH 

Amriswil · Since 2023

The core activity of E Tec-Elektro GmbH is the planning, installation and commissioning of electrical and photovoltaic systems, including: installation and commissioning of photovoltaic systems, storage solutions and optimization of domestic power, e-mobility: installation of charging infrastructure, high and low voltage installations, and renovation and maintenance work in all areas of electrical engineering.

Electrical Planning & InstallationSolar & Photovoltaics
View profile5(2)
EV Gebenstorf AG Logo

EV Gebenstorf AG 

Gebenstorf · Since 2010

The core activity of EV Gebenstorf AG is to supply the municipality of Gebenstorf with electricity, particularly in the operation and maintenance of a safe, efficient and reliable power grid.

Energy Suppliers
View profile3(2)
EW Lachen AG Logo

EW Lachen AG 

Lachen Sz · Since 2001

The company's core activity includes providing energy and water supply services, including: electricity supply with various tariffs and products for private and commercial customers; solar energy and photovoltaic systems (PVA); water supply with drinking water and corresponding products and prices; fiber optic network and broadband services; GIS specialist departments and survey areas; drone surveying and photogrammetry. The company also offers various services such as installation control, reporting and savings tips.

Energy Suppliers
View profile3(2)
EW Rothrist AG Logo

EW Rothrist AG 

Rothrist · Since 2001

The core activity of EW Rothrist AG is the supply and distribution of electricity, particularly for industrial and private customers. The company offers services such as electricity supply, meter reading, consumption value visualization and management, as well as additional services related to electricity supply.

Energy Suppliers
View profile3(2)
Express Kanalreinigung GmbH Logo

Express Kanalreinigung GmbH 

Regensdorf · Since 2017

The core activity of the company "Express Kanalreinigung GmbH" consists of cleaning and maintaining sewer and pipe systems, including the clearing of clogged wastewater pipes, inspection and rehabilitation of sewers and pipes, as well as the suction and disposal of problem substances from containers and shafts. The company also offers emergency services to quickly respond to clogged drains and sewers.

Waste Management Industry
View profile5(2)
ezee Energy Suisse AG Logo

ezee Energy Suisse AG 

Weesen · Since 2021

The core activity of ezee Energy Suisse AG is the marketing and distribution of products and services in the field of photovoltaics and renewable energies in Switzerland. This includes in particular: the distribution of high-quality components for photovoltaic systems, such as photovoltaic modules, inverters and monitoring systems; consulting and supporting installation companies and craftsmen in the planning and installation of photovoltaic systems; arranging specialized companies that install and maintain photovoltaic systems; and providing service offerings, such as coaching, planning tools and tender texts, for installation companies and architects. The company positions itself as an expert in photovoltaics and renewable energies in Switzerland and aims to drive the energy transition forward with its products and services.

Solar & Photovoltaics
View profile5(2)
Fahrni & Haymoz GmbH Logo

Fahrni & Haymoz GmbH 

Alterswil Fr · Since 2000

The core activity of Fahrni & Haymoz GmbH is the provision of services in the field of timber construction, particularly in the areas of: carpentry, interior finishing, roofing and sheet metal work, facades, scaffolding, lightning protection and photovoltaics. The company thus offers a wide range of services focused on the planning, execution and maintenance of timber structures.

Interior ConstructionTimber Construction & CarpentryRoofing
View profile5(2)
Fartec GmbH Logo

Fartec GmbH 

Illighausen · Since 2023

The core activity of Fartec GmbH encompasses the planning, installation and commissioning of photovoltaic systems, as well as the associated services such as consulting, service and maintenance. Furthermore, the company also offers facility services including caretaking, interior and exterior cleaning, technical caretaking and winter services.

Solar & Photovoltaics
View profile5(2)
Ferri Haustechnik GmbH Logo

Ferri Haustechnik GmbH 

Wetzikon Zh · Since 1998

The core activity of Ferri GmbH is the provision of services in the areas of heating, sanitation and solar energy. This includes consulting, planning, installation and maintenance of systems in these areas.

Solar & Photovoltaics
View profile5(2)
fiberax GmbH Logo

fiberax GmbH 

Spreitenbach · Since 2022

The core activity of Fiberax GmbH includes the planning, design, maintenance and support of telecommunications networks, particularly fiber optic and copper networks, as well as the installation and maintenance of solar systems and charging stations for e-mobility. In addition, the company offers network solutions, electrical installations and services in the field of renewable energies.

Solar & PhotovoltaicsTelecommunications
View profile5(2)
Firmin Claude & Fils Sàrl Logo

Firmin Claude & Fils Sàrl 

Boncourt · Since 1996

The core activity of Firmin Claude et Fils Sàrl is the installation, renovation, and maintenance of sanitary facilities and heating systems. This includes in particular: The installation and maintenance of heating systems, including adaptation to current standards; The installation and renovation of sanitary facilities, including adaptation to the needs of private individuals and companies; Work on water pipes, sewage pipes, and other sanitary facilities; The installation and maintenance of bathrooms and sanitary facilities; Work on industrial sanitary facilities and the installation of pipes for companies. The company primarily offers its services in the canton of Jura, particularly in the Ajoie region, Delémont, and the Franches-Montagnes.

Solar & Photovoltaics
View profile5(2)
Flückiger Gebäudetechnik AG Logo

Flückiger Gebäudetechnik AG 

Rohrbach · Since 2020

The core activity of Flückiger Gebäudetechnik AG encompasses the planning, installation, commissioning, repair and renovation of: Sanitary installations, Heating systems and heating systems, Solar systems (thermal and photovoltaic), Pipework, Metalwork and sealing of building envelopes. The company thus offers comprehensive services in the field of building technology and domestic engineering.

Sheet Metal WorkSolar & Photovoltaics
View profile5(2)
Fondation PlanetSolar Logo

Fondation PlanetSolar 

Yverdon-Les-Bains · Since 2007

The core activity of the Fondation PlanetSolar is to promote sustainable solutions, particularly in the field of solar energy, through innovative and educational initiatives. This includes organizing expeditions, developing solar-powered vehicles, hosting exhibitions and conferences, and supporting environmental projects. The goal is to raise awareness of environmental protection and develop sustainable solutions for the future.

Sustainability Sector
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FORNAT AG Logo

FORNAT AG 

Zurich · Since 1980

FORNAT AG provides consultancy and planning services in nature conservation and ecology. It prepares assessments and concepts, manages projects, conducts monitoring and statistical and GIS-based data analyses, and works on topics including wildlife management and hunting, aquatic ecology and fisheries, species and habitat management, forest ecology and environmental education.

Sustainability Sector
View profile5(2)
Fretz Kanal-Service Einsiedeln AG Logo

Fretz Kanal-Service Einsiedeln AG 

Einsiedeln · Since 2017

Fretz Kanal-Service Einsiedeln AG is a company for sewer and drainage services, offering high-pressure cleaning, drain and pipe cleaning, suction operations and shaft and sewer rehabilitation. Its services also include CCTV inspection and leak testing, street and surface cleaning, and a 24/7 emergency service.

Waste Management Industry
View profile4.5(2)
F&R Schaad Logo

F&R Schaad 

Dietlikon · Since 2020

The core activity of Apilaya is the manufacture and sale of beekeeping equipment, particularly honeycomb frames for bees, as well as the relocation of bees, hornets, wasps and bumblebees.

Sustainability Sector
View profile5(2)
Gebrüder Rüger AG Logo

Gebrüder Rüger AG 

Innertkirchen · Since 1982

Gebrüder Rüger AG is a trades company specializing in sanitary installations, sheet-metal roofing work and heating systems. Services include planning and installation of bathrooms (3D planning), supply and drainage piping (including PE pressure pipes), heating solutions such as heat pumps and condensing boilers, building sheet-metal work and thermal solar systems, together with related consultation and maintenance.

Sheet Metal WorkSolar & Photovoltaics
View profile3(2)
Gebr. Zimmermann AG, Spenglerei und Installationen Logo

Gebr. Zimmermann AG, Spenglerei und Installationen 

Visperterminen · Since 1969

The core activity of Gebrüder Zimmermann AG is the provision of services and works in the areas of sanitary, heating, plumbing, roofing, solar and stone slab roofing. Specifically, this includes the installation, maintenance and repair of sanitary facilities, heating systems, plumbing work, roofing, solar systems and stone slab roofs.

RoofingSolar & Photovoltaics
View profile5(2)
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Frequently asked questions

Searching the directory

How the search works, what each filter means, and how the results come together.

What can I search for in the directory?
The search field matches company names, industries and places. Beyond that you can filter by Industry (18 categories based on the NOGA classification), Size (number of employees), Region (canton, language region or postal code) and Special (keywords and entry date). Filters combine freely; the active ones appear as chips below the filter bar and can be removed there individually.
How do keywords work?
Keywords search the description and stated purpose of each company — the text that goes beyond the company name. Multiple keywords are combined with OR: every additional keyword widens the set of matches rather than narrowing it.
What belongs in the postal code field?
A single postal code (e.g. 8000) or a range (e.g. 1000-1010). The field accepts postal codes only — for place names, use Canton or Language region.
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How is organisation size determined?
Size reflects the number of employees and is calculated from publicly available information by a model developed in-house. It is a best-possible estimate, not an official figure.
What does the Verified label mean?
Verified means the entry is tied to a UID (Swiss business identification number) and therefore links back to the official Swiss business register. The label speaks to the company's identity — it is not a rating of its performance.

Source: Federal Statistical Office, UID register

How do I sort the results?
Use the dropdown above the list: Relevance, Name (A–Z), Best rating, Most reviews or Longest established. You can also switch between list and map view and set how many results appear per page.