Energy & Environment

Würsch Söhne AG 

Emmetten · Since 1976

The core activity of Würsch Söhne AG is the provision of services in the field of building envelopes, particularly in the areas of: Roofing (pitched roof, flat roof), Facades, Solar systems / Photovoltaics, Sheet metal work / Lightning protection, Renovations / Monument preservation, Under-roof / Insulations, Repair / Maintenance, Consulting / Estimating, Crane work / Lift platforms, and Bird protection. The company offers comprehensive services for new construction, maintenance, and renovation areas, combining traditional expertise with modern trends, materials, and technologies.

Zett Haustechnik AG 

Oberschan · Since 2015

The core activity of Zett Haustechnik AG is the installation, maintenance and repair of heating and plumbing systems, including the planning and implementation of projects in the field of building technology, such as the conversion of oil boilers to geothermal heat pumps. The company also offers services in the field of solar systems and sanitary services.

Ziltener-Heizungen GmbH 

Staufen · Since 2019

Ziltener-Heizungen GmbH provides consultation, installation and maintenance of heating systems, heat pumps and solar/photovoltaic systems. Services include boiler descaling and replacement, solar-panel cleaning and maintenance contracts, as well as heating renewals and system servicing.

Stratton ENERGIES Sàrl 

Neuchâtel · Since 2025

The core activity of Stratton Energies is the planning, installation and maintenance of renewable energy systems, in particular: * Photovoltaic systems (installation, panel cleaning) * Solar systems (solar carports) * Heat pumps (heat pumps) * Thermodynamic boilers * Air conditioning systems (air conditioning) * Energy efficiency solutions (CECB/CECB+) The company also provides consulting and support for applying for subsidies for energy efficiency measures in various cantons of Switzerland.

Aaki GmbH 

Diegten · Since 2016

The core activity of Aaki GmbH encompasses three main areas: 1. **Pipe and Shaft Cleaning**: Cleaning of pipes and shafts to ensure efficient and functioning infrastructure. 2. **CCTV Inspection**: Examination of channels and pipes using TV technology to inspect their condition and potential damage. 3. **Customer Masonry and Civil Engineering**: Provision of masonry and civil engineering services for private customers, public authorities, and architectural offices, including construction management and civil engineering services.

Abegglen & Co. Transporte 

Brienz Be · Since 2015

Abegglen & Co. Transporte is a family-run company providing transport, waste disposal and recycling services as well as excavation and construction transport. The company operates an Entsorgungs- und RecyclingZentrum (ERZ Lauimatte) with a sorting facility, vehicle weighbridge and container services, and offers mobile material processing equipment for recycling.

Abegglen Transporte & Tiefbau GmbH 

Brienz Be · Since 2023

The core activity of Abegglen & Co. Transporte is the execution of waste disposal and recycling works, including waste collection, material processing and transportation services.

AC/DC Solar + Elektro GmbH 

Neudorf · Since 2016

The core activity of AC/DC Solar + Elektro GmbH is the planning, consulting and realization of solar systems and electrical installations, in particular photovoltaic systems, for private and commercial customers.

AceFlex Swiss AG 

Dübendorf · Since 2022

The company's core activity is providing holistic energy solutions for businesses, particularly in the field of sustainable energy supply, including photovoltaics, eMobility and energy management systems. The company offers tailored solutions to support businesses in achieving their sustainability goals and reducing energy costs.

ADEV Energiegenossenschaft 

Liestal · Since 1985

ADEV Ökowärme AG 

Liestal · Since 1995

ADEV Solarstrom AG 

Liestal · Since 1999

Aeberhard AG Gstaad 

Saanen · Since 2007

The core activity of Aeberhard AG Gstaad is the cleaning, maintenance and repair of drains, pipes, ducts and shafts, including the emptying and disposal of sewage treatment plants, street shafts and oil and grease separators. This also includes specialized services such as inspection using camera technology, tightness testing, analysis and defect testing, as well as environmentally friendly lime removal and cleaning of streets, tunnels and surfaces.

AEB-Hostettler 

Corminboeuf · Since 2022

The core activity of AEB-Hostettler is the execution of inspections and certifications in the field of electrical engineering and energy efficiency of buildings. Specifically, this includes: * Inspection of electrical installations in accordance with the standards of the OIBT (Organisme d'Inspection des Installations Electriques) * Creation of energy certificates for buildings (CECB, Certificat Énergétique Cantonal des Bâtiments) * Conducting energy analyses for buildings * Consulting on electrical safety issues The company offers these services to both private and professional customers.

A+E Service GmbH 

Finstersee · Since 2000

The core activity of A+E Service GmbH is the execution of disposals, clearances, demolitions, and small excavation services, as well as environmental and civil engineering works. Specifically, this includes: small excavation services (2-5 cubic meters), clearances, disposals, household clearances, demolitions, and environmental and civil engineering works. The company offers these services to both private and business customers in the canton of Zug and the surrounding cantons.

Albrecht Marco, Solar- und Wärmetechnik 

Bitsch · Since 1996

The core activity of AMS Solar and Heat Technology is the planning, installation and maintenance of solar technology systems, particularly photovoltaic and solar thermal systems, as well as the manufacture of stainless steel boilers and energy storage systems. In addition, the company offers services in the field of building biology, such as infrared thermal imaging.

alenergy invest AG 

Gossau Zh · Since 2013

The core activity of Alenergy is the planning, installation and maintenance of photovoltaic systems for homeowners and industry, with a focus on solar technology, energy efficiency and renewable energy generation.

Alpen Energie GmbH 

Aesch Bl · Since 2024

The core activity of AlpenEnergie is the planning, consulting, sales and installation of innovative and sustainable energy solutions, in particular photovoltaic and storage systems, as well as the provision of products such as solar systems, wall boxes, inverters, storage systems, energy management systems, heating rods and emergency/backup power systems.

ALPHA Solar Systems Sàrl 

Cortaillod · Since 2023

The core activity of Alpha Solar Systems is the planning, installation and maintenance of solar systems, as well as providing solutions for the storage of renewable energy and the charging of electric vehicles. This includes in particular: installation of photovoltaic systems, construction of carports with integrated solar systems, installation of charging stations for electric vehicles, provision of battery storage systems, maintenance and repair of solar systems, and development of solutions for mining cryptocurrencies with renewable energy.

Anerdgy AG 

Zurich · Since 2012

The core activity of Anerdgy is consulting and planning rooftop uses, particularly in the field of renewable energy and multifunctional rooftop design. The company offers services such as rooftop potential analysis, detailed planning, rooftop maintenance and construction management to support customers in optimizing and utilizing their rooftop spaces.

Anna Drygajlo architecte epf sia 

Vevey · Since 2013

The company "La Maison Nature" primarily focuses on sustainable architecture, ecological building, and gardening. The core activities include: * Consulting and planning for ecological building and sustainable architecture * Development and use of ecological materials * Water management * Energy efficiency in everyday life * Natural gardens * Healthy housing * Permaculture The company also offers workshops, events, and consulting services for private individuals and professionals.

ANTAG Recycling AG 

Zwingen · Since 2007

ANTAG Recycling AG produces aggregates (gravel and sand) and concrete and provides transport, disposal and material-recycling services. The company operates the DORO soil-treatment facility to process excavation and construction waste into reusable construction materials.

A&O connect GmbH 

Remetschwil · Since 2023

The core activity of A&O connect GmbH is the planning, installation and maintenance of electrical systems, including photovoltaic systems and charging stations for electric vehicles, as well as providing services in the field of electromobility, electrical installations, electrical inspections and planning & consulting.

Aqua Dällikon AG 

Dällikon · Since 2001

Aqua Dällikon AG provides customized water treatment solutions, designing, manufacturing and servicing systems for drinking, laboratory, industrial and rain/street water. The company produces in-house systems and supplies technologies such as water softeners, filtration, reverse osmosis, UV disinfection, dosing equipment, neutralisation and decay/storage installations, supporting projects from planning through execution.

Aquaring Service AG 

Dällikon · Since 2000

Aquaring Service AG provides customised water treatment and wastewater recycling services, including planning, in‑house fabrication and commissioning of treatment systems. Offerings include water softening, filtration, reverse osmosis, UV disinfection, neutralisation and decay systems, as well as pipe flushing and maintenance.

Ardega Deponie AG 

Mühlehorn · Since 1999

The company Ardega Deponie AG operates a landfill with two clearly separated sections: one for excavation material (landfill type A) and one for inert materials (landfill type B). The core activity of the company is to monitor and carry out the acceptance, classification and disposal of waste and materials. This also includes the sale of gravel and other materials.

asbest.tech GmbH 

Oberentfelden · Since 2024

The company's core activity is the remediation and disposal of pollutants, particularly asbestos, in buildings and industrial facilities. This includes the assessment of projects, the development of customized concepts, the professional removal of pollutants, the disposal of pollutants in accordance with legal requirements, and the cleaning of pollutant-contaminated buildings.

Asons AG 

Horw · Since 2021

The core activity of asons is the planning, implementation and integration of energy-efficient solutions for private customers, building owners, public institutions, architectural and electrical companies. This includes in particular: The installation and integration of photovoltaic systems, the planning and implementation of energy storage solutions, the development and implementation of e-charging stations for electric vehicles, building automation and KNX integration, and the creation of individual energy concepts and solutions. The company thus offers a comprehensive range of services in the field of renewable energies and energy efficiency.

Basler GU & Immobilien AG 

Pratteln · Since 2020

The company's core activity is the planning, development, architecture, construction management and owner representation of medium-sized to large commercial construction projects, including renovations and new construction projects, for private individuals and large corporations from various sectors, such as public institutions, retail, hospitality, industry, healthcare, and manufacturing.

Baustoff Recycling Nordwestschweiz AG 

Zwingen · Since 2020

Bau- und Energieberatung Reto Niedermann GmbH 

Oberentfelden · Since 2011

Bau- und Energieberatung Reto Niedermann GmbH provides energy and building consultancy including building-physics services such as energy calculations, GEAK®-Plus assessments, airtightness (BlowerDoor) tests, thermography and certification support. The company also designs and supplies prefabricated bathroom systems for care facilities, hotels and residential buildings and assists with planning, production drawings and subsidy applications.

Berom AG 

Brügg Be · Since 1997

Berom AG provides green-waste processing, composting and mobile on-site services. Its activities include biomass shredding, sieving of compost and humus, turning compost heaps and managing composting sites, and it supplies end products such as compost soil, garden humus and wood chips.

Bio-Eco Sàrl 

Vevey · Since 2001

The company Bio-Éco offers consulting and strategy services in the areas of sustainability, environment, and energy. The core activities include: development and implementation of sustainability strategies, support for the energy transition and reduction of greenhouse gas emissions, project management and coordination in the field of sustainability and environmental protection, implementation of research and expert projects, organization of events, workshops, and conferences on sustainability and environmental protection topics, and consulting and support for companies, organizations, and public institutions in implementing sustainability goals and strategies. The core activities of Bio-Éco aim to support companies and organizations in implementing sustainability goals and strategies, and to promote the energy transition and environmental protection.

BioEcoEnergie SA 

Gollion · Since 2011

The core activity of BioEcoEnergie SA is the production of renewable energy through the transformation of organic waste into heat and electricity. This includes in particular: the production of biogas, the collection and recycling of kitchen waste and oils, the provision of heat through district heating, and the recovery of organic waste from hotels, restaurants, hospitals, etc. The company thus offers a comprehensive solution for the recovery of organic waste and the production of renewable energy.

Böller AG Holz- und Solarbau 

Frick · Since 1978

Böller AG Holz- und Solarbau provides timber construction, roofing and solar installation services. The company plans and executes new builds, conversions, renovations and timber façades, produces prefabricated timber elements and designs and installs photovoltaic systems, including related roof and maintenance work.

brighthouse ag 

Sins · Since 2008

The core activity of brighthouse AG is the planning, installation and marketing of solar systems, in particular photovoltaic systems and solar facades.

Bruntech AG 

Oberlunkhofen · Since 1983

The core activity of Bruntech AG includes the planning, implementation and maintenance of plants for renewable energies, in particular: heat pumps and hybrid collector systems, solar and photovoltaic systems, cisterns, spring and rainwater systems, noise reduction solutions, including noise-cancelling technology, to reduce noise emissions, and energy storage systems. The company also offers consulting, planning and repair services for these systems.

B+T Engineering AG 

Dübendorf · Since 2011

The core activity of B+T Engineering AG is the planning, implementation and operation of environmental and energy production facilities, particularly in the areas of energy recovery from waste and biomass as well as the processing and utilization of residues.

BTsun SA 

Rennaz · Since 2018

BTsun SA is a general contractor for renewable energy systems offering photovoltaic, solar thermal and storage solutions, heat pumps and electric vehicle charging stations. The company provides turnkey installations, coordinates energy renovation and roof insulation work, and handles administrative procedures and subsidy applications.

BTsun SA 

Blonay · Since 2016

BTsun SA is a general contractor for renewable energy that provides turnkey solutions including photovoltaics, solar thermal systems, heat pumps, battery storage and electric vehicle charging stations. The company handles design, installation, coordination of trades, administrative procedures and subsidy applications, and also provides energy renovation, roof insulation and peer-to-peer energy sharing solutions.

Bührer GmbH Elektro Telematik 

Hallau · Since 2007

The core activity of Bührer Elektro Telematik is the planning, execution and maintenance of electrical installations, lighting design and telematics systems, including photovoltaic systems, e-charging stations, building automation, lighting and household appliances. The company also offers service and maintenance work, planning and design, as well as installation and testing in these areas.

CanalK Sàrl 

Courrendlin · Since 2010

The core activity of CanalK is to provide services in the field of sewerage, particularly: * Troubleshooting and cleaning of sewer pipes * Inspection and control of sewer pipes using cameras and detectors * Solving problems with infiltrations, water damage and unpleasant odors * Diagnosing and solving specific problems in new buildings and renovations in collaboration with other professionals such as plumbers, masons, heating technicians and carpenters. The company mainly offers its services to private households and has specialized equipment to act quickly and effectively to prevent damage from flooding, water ingress and other problems.

carewater GmbH 

Buchs Ag · Since 2019

The core activity of carewater GmbH is to advise and support public and private water suppliers, institutions such as hotels, swimming pools and nursing homes on all matters related to drinking water, including compliance with legal and technical requirements.

CELINA GmbH 

Möhlin · Since 2001

The core activity of Celina GmbH encompasses services in the field of sewer cleaning and maintenance, including: sewer cleaning and suction and flushing works, sewer television and location, high-pressure and special works, as well as transportation and disposal. The company thus offers specialized services for the maintenance and cleaning of sewers and pipelines.

Centre de recherche Crem 

Martigny · Since 1987

The core activity of Crem is to support and advise municipalities and companies in implementing a sustainable energy policy and developing solutions to the challenges of the energy transition. This includes in particular the development of tools and methods for territorial energy planning, such as the SIG tool PlanETer, as well as the implementation of research and development work in the field of energy transition and sustainable development.

Ch. Bürgin Haustechnik GmbH 

Aeschi B. Spiez · Since 2002

The core activity of Ch. Bürgin Haustechnik GmbH encompasses the planning, installation, and maintenance of building technology systems, particularly in the areas of: Heating systems (including renewable energy sources such as solar and wood energy), Sanitary systems (including rainwater harvesting and creative space design), Sheet metal work (including precise and accurate work on-site), and Solar systems (to utilize existing resources). The company provides consulting and planning services in these areas and works closely with customers to develop individualized solutions.

ClimatePartner Switzerland AG 

Zurich · Since 2007

The ClimatePartner GmbH supports other companies in reducing and compensating their CO2 emissions by developing and implementing climate protection strategies, calculating CO2 footprints, financing climate protection projects, and certifying climate-friendly products and services.

Compostière Le Péchau Sàrl 

Châbles Fr · Since 2021

The core activity of the company "Le Péchau" is the composting of green waste for private households and businesses.

Cowa Thermal Solutions AG 

Root D4 · Since 2019

The core activity of Cowa Thermal Solutions AG is the development and manufacture of innovative heat storage systems based on phase change material (PCM) technology. These storage solutions are compact, powerful, hygienic and long-lasting, enabling efficient and space-saving energy storage in heating and energy systems. The company focuses on providing sustainable solutions for the energy transition and supports the use of renewable energies in residential, commercial and industrial buildings.

CRESYS GmbH 

Kaiseraugst · Since 2014

The core activity of CRESYS GmbH is consulting, installation and maintenance of solar systems.