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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

Polyvoltark GmbH Logo

Polyvoltark GmbH 

Schmerikon · Since 2021

The company Polyvoltark GmbH primarily deals with the planning, installation and optimization of photovoltaic and solar systems for private households and industrial facilities. They offer energy supply solutions, including emergency power boxes, solar optimizers, battery storage systems and e-charging stations for vehicles.

Solar & Photovoltaics
View profile5(5)
Portner-Elektro GmbH Logo

Portner-Elektro GmbH 

Neuenegg · Since 2020

The core activity of Portner-Elektro GmbH is the provision of electrical installation services.

Solar & Photovoltaics
View profile5(5)
Projets21 SARL Logo

Projets21 SARL 

Fribourg · Since 2023

The company Projets21 provides consulting and support services to businesses in the areas of sustainability, environment, quality, and digital transformation. The core activity of the company is to support businesses in integrating changes and optimizing their processes, particularly through the implementation of management systems and the achievement of certifications.

Management ConsultingSustainability Sector
View profile4.6(5)
Prona AG Logo

Prona AG 

Biel/Bienne · Since 1991

Prona AG is an engineering services provider offering consulting and planning in environmental protection, occupational safety and building physics. Its practice areas include buildings and settlements, industry and commerce, infrastructure and mobility, nature and landscape, and applied research, and it supports clients in the planning and implementation of new-build, maintenance and renovation projects.

Sustainability Sector
View profile5(5)
Prona AG Logo

Prona AG 

Basel · Since 2009

Prona AG is an engineering services provider specialising in environmental protection, occupational safety and building physics. It offers planning and implementation support for new-build, maintenance and renovation projects and provides specialist services such as environmental consulting, applied ecology, building physics, acoustics/noise control, soil protection, waste and building-pollutant management, UVP/UBB, GIS/BIM and ergonomics.

Sustainability Sector
View profile5(5)
PVsyst SA Logo

PVsyst SA 

Satigny · Since 2011

PVsyst SA develops and distributes software for the design and simulation of photovoltaic systems. Its product lineup includes PVsyst 8 and PVsystCLI, and it provides databases, technical support, training, and consulting services.

Solar & Photovoltaics
View profile4.8(5)
R & B STORES SÀRL Logo

R & B STORES SÀRL 

Geneva · Since 2015

The core activity of R&B Stores Sàrl is the supply and installation of awnings, shutters, mosquito nets, grilles and gates, as well as solar screens. The company offers a wide range of interior and exterior awnings that meet both aesthetic and functional requirements, such as sun protection in summer and heat insulation in winter.

Solar & Photovoltaics
View profile5(5)
RCO Recycling Center Ostschweiz AG Logo

RCO Recycling Center Ostschweiz AG 

Zuzwil Sg · Since 2018

The core activity of RCO Recycling Center Ostschweiz AG is the processing, recycling and recovery of mineral materials such as mixed or concrete demolition waste, railway ballast and excavation materials, in order to produce high-quality new building materials for civil engineering and construction.

Waste Management IndustryGlass, Ceramics, Stone & Construction Materials Industry
View profile5(5)
REI Renewable Energy Investments AG Logo

REI Renewable Energy Investments AG 

Basel · Since 2024

REI Renewable Energy Investments AG provides planning, supply and installation of photovoltaic systems, battery storage solutions, electric vehicle charging systems, heat pumps and contracting services.

Solar & Photovoltaics
View profile5(5)
REI Solar GmbH Logo

REI Solar GmbH 

Basel · Since 2023

REI Solar GmbH is a solar energy company that plans, installs and maintains photovoltaic systems. The firm also provides battery storage systems, electric vehicle charging solutions, heat pumps and contracting offerings, and handles consultation, project planning and commissioning.

Solar & Photovoltaics
View profile5(5)
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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.