Photovoltaics in
Herisau

Diener Haustechnik AG

Since 2010 · 1–10 empl.·4.7(13)

Diener Haustechnik AG provides plumbing, heating and solar technology services, as well as tank inspections. Its work includes installations, repairs and maintenance for new buildings and renovation projects.

Elektro Knöpfel AG

Since 1989 · 1–10 empl.·5.0(7)

The core activity of Elektro Knöpfel AG includes the planning and installation of electrical systems, including lighting, photovoltaics, network and internet solutions, telephony and TV systems.

Nigg Energietechnik AG

Since 1998 · 11–20 empl.·4.8(6)

The company provides services in the field of heating, ventilation and air conditioning.

Helios Swiss Solution AG

Since 1994 · 1–10 empl.·5.0(9)

AST Eissport- und Solaranlagenbau AG

Since 1991 · 21–50 empl.

AST Eissport- und Solaranlagenbau AG plans and builds mobile and permanent ice rinks, as well as solar and artificial-turf heating systems. Its products also include rink boards, ice-resurfacing machines and other equipment for ice rinks and sports facilities.

GT Solar Invest AG

Since 2010 · 11–20 empl.

GT Solar Invest AG provides solar contracting for businesses and private properties. It assesses energy needs, plans and installs solar systems on leased rooftops, and manages their operation and maintenance; customers purchase the generated solar electricity at a price agreed in advance.

Lumisol GmbH

Since 2013 · 1–10 empl.

Lumisol GmbH provides photovoltaic systems and related services for residential and commercial clients, including consultation, system design, installation, maintenance, and battery storage with monitoring. The company carries out electrotechnical work limited to the installation of electrical high-current systems and equipment up to 1500 volts and 150 kilowatts, and the installation of lightning protection systems.

E-Q GmbH

Since 2020 · 11–20 empl.

E-Q GmbH operates an electrical installation business, offering electrical wiring and network planning, photovoltaic systems, smart-home solutions, and telematics and VoIP communications. Its services include planning, implementation, and maintenance.

PVT-Schweiz GmbH

Since 2008 · 1–10 empl.·5.0(2)

PVT-Schweiz GmbH plans and installs photovoltaic systems using European solar modules, as well as battery storage and backup systems. Its services include consulting, subsidy administration, monitoring, and solutions featuring Enphase microinverters and fire protection.

Alpen Solar GmbH

Since 2025 · 1–10 empl.

Alpen Solar GmbH plans and installs photovoltaic and solar systems for residential and commercial customers. Its services cover planning and permits, installation and commissioning, battery storage with backup power, inspections, maintenance and cleaning.

Kopernikus Energy KLG

Since 2025 · 1–10 empl.

Kopernikus Energy KLG plans and implements photovoltaic systems and energy projects for building and open-area sites. The company also provides consulting, planning, execution, and after-sales service related to heat pumps and energy-efficient renovations.

easysolar europe GmbH

Since 2020 · 1–10 empl.

easysolar europe GmbH provides photovoltaic services and consulting for business customers. Its photovoltaic offering is aimed at both commercial and private customers.