Solar & Photovoltaics in the
Canton of Grisons

De-Stefani AG

Since 1973 · 1–10 empl.·4.6(10)

The core activity of De-Stefani AG is the planning, installation, maintenance and repair of building technology systems, particularly in the areas of heating, plumbing and ventilation, for single-family and multi-family homes as well as other buildings.

Groll Haustechnik AG

Since 2011 · 1–10 empl.·4.9(7)

Groll Haustechnik AG is a building-services company offering sanitary installations, heating, ventilation and solar systems, together with integrated planning and project execution.

Elektro Partner Klosters AG

Since 2010 · 1–10 empl.·5.0(8)

Elektro Partner Klosters AG provides electrical installations, solar system installation, service, maintenance and electrical inspections. The company also supplies automation and smart‑home solutions (Loxone, KNX, DALI), PLC/SPS development, and PC/IT/web services including networks, VoIP/telephony, hosting and remote support, and it imports and tests devices in its own test laboratory.

Stecher AG

Since 1981 · 1–10 empl.·4.6(8)

The core activity of Stecher AG encompasses the planning, installation, and maintenance of various technical facilities and systems in the field of building technology, including: sanitary installations, heating systems, roofing and roofing work, sheet metal work and metal facades, photovoltaic systems, lightning protection systems, fall protection systems, balcony waterproofing, liquefied gas controls, and supply networks. The company also offers energy consulting and planning services and specializes in the installation and maintenance of renewable energy systems.

R. Vonplon Söhne AG Haustechnik

Since 2000 · 1–10 empl.·4.9(7)

The core activity of R. Vonplon Söhne AG – Haustechnik is the planning, installation, maintenance and repair of sanitary and heating systems, including consulting and implementation of heating renovations and new installations, heat pumps, wood, solar, oil and gas heating systems in the region of Graubünden.

electro cadi SA

Since 2009 · 11–20 empl.·4.8(4)

The core activity of electro cadi includes the planning and execution of electrical installations, services in the field of building technology, as well as the trade of electrical articles of all kinds.

Roman Erni AG

Since 1986 · 11–20 empl.

The core activity of Roman Erni AG is the provision of services in the fields of roofing, sheet metal work and photovoltaics. Specifically, this includes the planning, execution and maintenance of roof structures, including sealing, roofing, sheet metal work, photovoltaic systems, aerial lift work, roof windows and winter services. The company also offers consulting and training in these areas.

hassler energia alternativa ag

Since 1997 · 21–50 empl.

The core activity of Hassler Energia is the planning, installation and maintenance of sustainable energy solutions, particularly: solar systems for self-consumption and central energy supply (ZEV); battery storage as a supplement to PV systems; e-charging stations for clean e-mobility; island systems for mountainous areas without grid connection; and pellet heating as an alternative heat source. The company also offers consulting services to support customers in selecting and implementing sustainable energy solutions.

Walter Salzmann GmbH

Since 1997 · 11–20 empl.

The core activity of Walter Salzmann GmbH is the provision of services in the field of roofing and sheet metal work, including the planning, execution and maintenance of roof systems, as well as the installation of photovoltaic systems. Specifically, this includes the areas of: Roofing (pitched roof, flat roof, roof windows, roof coverings, roof renovations), sheet metal work (roof structures, metal roofs, dormer windows, snow retention systems), photovoltaics (planning, installation and maintenance of photovoltaic systems), renovations and refurbishments of roof systems, and sealing and insulation of building envelopes. The company offers these services for all types of roofs and is specialized in meeting the needs of customers in the Upper and Lower Engadine.

Marcel Levy GmbH

Since 1998 · 1–10 empl.

The core activity of Levy Solar is the installation and servicing of home technology, particularly in the field of solar systems and home automation.

B. und H. Schuler-Rozzi, Schreinerei und Sanitäranlagen

Since 2003 · 11–20 empl.

The core activity of Schuler-Rozzi encompasses three main areas: 1. **Carpentry/Joinery**: Manufacturing of carpentry products, particularly from regional solid woods, for interior finishing and furniture. 2. **Plumbing/Heating**: Installation and servicing of plumbing and heating systems, including alternative heating systems and connection to the district heating network. 3. **Solar**: Planning and installation of solar systems for the utilization of solar energy. The company thus offers a combination of traditional craftsmanship in carpentry and modern technologies in plumbing, heating and solar technology.

Hartmann, Solartechnik

Since 2003 · 1–10 empl.

The core activity of Hartmann is the planning, installation and maintenance of solar systems in various sizes (up to 10 kWp, 10-30 kWp, 30-100 kWp and over 100 kWp).

Calstrom GmbH

Since 2007 · 1–10 empl.

Calstrom GmbH designs and supplies energy and safety systems, including photovoltaic energy centers, solar thermal systems for hot water and heating, small hydropower installations (Pelton turbines) and backup generators. The company also provides automation, measurement and control (PLC) solutions and wildlife warning systems for road safety.

Deflorin Elektroanlagen GmbH

Since 2007 · 1–10 empl.

The core activity of Deflorin Flims GmbH encompasses comprehensive electrical installations, IT services, smart home solutions, photovoltaic systems, computer and telecommunications services, including remote maintenance and VoIP telephony.

Roner & Partner Scrl

Since 2009 · 1–10 empl.

Roner & Partner Scrl is an electrical engineering firm providing planning, installation and repair of electrical systems as well as testing and maintenance of electrical equipment. Its services also include supply and installation of low-voltage (UKV) cabling, telephone system installation (Sunrise and Swisscom partner), sale of electronic appliances and photovoltaic (PV) systems.

Arosa Energie

Since 2011 · 21–50 empl.

Arosa Energie supplies electricity to customers, operates the distribution network and runs hydropower and solar generation facilities. It provides grid services (connections, public lighting), electric mobility charging options, advice on photovoltaic installations, and handles feed-in tariffs and periodic electrical inspections.

Mittner Engineering AG

Since 2011 · 1–10 empl.

The core activity of Mittner Engineering AG is the planning, control and servicing of electrical systems, including: electrical planning, installation of high and low voltage systems in new and renovation projects, energy optimization, renovation of lighting systems, planning and installation of photovoltaic systems, planning and installation of alarm systems, planning and installation of UKV/LWL and TV/SAT systems, and building automation. The company offers these services as an electrical planner and service provider in the regions of St. Moritz, Müstair, Märstetten and surrounding areas.

Solarmontagen.ch GmbH

Since 2013 · 1–10 empl.

The core activity of Solarmontagen.ch GmbH is the planning, installation and maintenance of solar and photovoltaic systems, particularly in high-altitude regions. The company offers individual solutions for sustainable energy and works with Swiss freelancers, solar technicians, roofers and electricians to achieve this.

R. Rageth GmbH

Since 2013 · 1–10 empl.

The core activity of R. Rageth GmbH is the planning, consulting and execution of sanitary and heating systems, including related services such as maintenance, servicing and repair.

Elektro RES AG

Since 2013 · 11–20 empl.

Elektro RES AG performs complete electrical installations, including high- and low-voltage systems, switchboard construction and safety inspections with associated control reports. The company plans and installs solar systems including administrative handling, sells electrical accessories and installs and programs KNX bus systems.

DHP Technology AG

Since 2015 · 21–50 empl.·4.5(8)

The company's core activity is the development, production and planning of solar roofs for various fields of application such as wastewater treatment plants, parking areas, motorway rest stops and logistics areas. The company offers innovative energy solutions for the successful management of these areas and develops state-of-the-art energy supply systems.

Elektro RES AG

Since 2017 · 1–10 empl.

Elektro RES AG carries out complete electrical installations for new builds and renovations, and provides subsequent modifications and additions to existing systems. The company sells electrical accessories in-store and online and performs safety inspections with the required control reports.

Ars Solaris Hächler

Since 1993 · 1–10 empl.

Semadeni Impiantistica SA

Since 2017 · 1–10 empl.·4.6(5)

The core activity of Semadeni Impiantistica SA consists in the planning and realization of various technical plants and installations, including: hydraulic systems, heating systems, sanitary installations, ventilation systems, solar systems and renewable energies, roofing and sheet metal work. The company thus offers a wide range of services in the field of technical building equipment and installation.

Nau Solar Systemtechnik GmbH

Since 2006 · 1–10 empl.·4.3(6)

The core activity of NAU Solar Systemtechnik GmbH is the planning, installation and sale of environmentally friendly energy systems, in particular: photovoltaic systems, heat pumps, solar thermal systems, storage technology, fresh water technology, wood heating systems, pellet tanks, mobile heating centers and solar roofs. The company also offers services such as installation, permitting and sales of energy systems and positions itself as a partner for environmentally friendly energy use in Switzerland.

AF Solartechnik AG

Since 2024 · 1–10 empl.·4.9(13)

AF Solartechnik AG provides roofing and sheet metal work for new builds, conversions, and renovations. Its services include sheet metal work, pitched and flat roof solutions, and solar systems.

ARI GROUP SAGL

Since 2001 · 11–20 empl.·5.0(5)

The core activity of ARI Group Sagl includes the planning, installation and maintenance of electrical systems, including: electrical distributors, photovoltaic systems, kitchen equipment, purchase and sale of computers, monitors, printers and accessories, assistance and support for electrical appliances and computers, automation and switchboards. The company also offers services in the fields of electrical safety, lighting technology and satellite systems.

Grigolo Instal

Since 2015 · 1–10 empl.

The core activity of Grigoloinstal is the planning, installation, maintenance and repair of various technical systems, in particular: heating systems, sanitary and water systems, solar systems and air conditioning systems. The company also offers technical assistance, maintenance and repairs for these systems and keeps a stock of spare parts.

Dorn Solar AG

Since 2023 · 1–10 empl.·4.6(14)

Dorn Solar AG provides photovoltaic installations and building-envelope services, including sheet-metal work, roofing (flat and pitched) and façade construction. The company offers services for new construction, renovation and maintenance.

Morelisse Elektro AG

Since 1981 · 11–20 empl.·4.8(5)

The core activity of Morelisse Elektro AG is the provision of electrical services, including electrical installations, as well as the sale of electrical materials and household appliances.

Grischa Solar AG

Since 2024 · 11–20 empl.·5.0(8)

The core activity of Grischa Solar AG is the planning, installation and marketing of photovoltaic systems and comprehensive solutions in the field of solar energy, including solar systems, energy storage systems and electromobility solutions.

Dalaval GmbH

Since 2003 · 1–10 empl.·5.0(1)

Dalaval GmbH supplies products and services for dairy farming and milk handling, including milking systems (such as DeLaval VMS™ milking robots), milking equipment, and milk storage and cooling solutions. The range also includes farm management software (DeLaval DelPro™, DeLaval Plus), feeding and manure-management solutions, cow comfort products, and after-sales service.

Roger Holzinger Haustechnik

Since 2007 · 1–10 empl.·4.8(4)

Roger Holzinger Haustechnik provides building-services work with a focus on heating and sanitary systems. The company performs repairs and maintenance, new installations and renovations, bathroom planning, gas and water supply work, and installs solar hot-water systems and central vacuum systems.

Mithras Technology AG

Since 2018 · 1–10 empl.

Giger + Storz AG

Since 1975 · 11–20 empl.·5.0(3)

The core activity of Giger + Storz AG is the planning, installation and maintenance of electrical systems. They offer services in the field of electrical engineering and are thus an electrical company.

Ardüser Saas GmbH

Since 2012 · 1–10 empl.·5.0(5)

The core activity of Ardüser Saas GmbH is the installation and maintenance of heating, sanitary, solar and comfort ventilation systems. The company offers services in these areas and positions itself as a local partner for customers in the region.

Lucchinetti Haustechnik GmbH

Since 2021 · 11–20 empl.·5.0(5)

The company Lucchinetti Haustechnik is a specialist in thermal systems, focusing on the planning, installation, maintenance, and repair of heating systems, thermal solar systems, and heat pumps. The core activities include: installation and maintenance of heating systems, planning and installation of thermal solar systems, installation and maintenance of heat pumps, regular inspections and repairs of heating systems and thermal solar systems, replacement of heating elements and anodes, descaling of boilers, and cleaning of underfloor heating and panels. The company also offers subscription services for regular inspections and priority support to ensure an efficient and safe system.

Christoffel Sanitär-Heizung AG

Since 2022 · 1–10 empl.

The core activity of Christoffel Sanitär-Heizung AG is the execution of sanitary, heating and ventilation work, including consulting and installation of sanitary facilities and ecological heating systems.