Energy producer in the
Canton of St. Gallen

NeoVac ATA AG

Since 1979 · 11–20 empl.

NeoVac ATA AG provides integrated solutions for the intelligent and resource-efficient use and safe storage of energy and water. Its products and services include metering technology, monitoring and billing solutions, charging infrastructure for e-mobility, and plant and water-technology services.

Hydroelectra AG

Since 1986 · 1–10 empl.

Hydroelectra AG operates nine small hydropower plants in Switzerland, generating electricity from run-of-river power.

Fernheizung Breite AG

Since 1991 · 1–10 empl.

Fernheizung Breite AG operates a district heating plant, supplying connected buildings through a heat network with energy produced from wood chips. The network serves the old town and surrounding neighbourhoods.

CRE & ART Barbara Berchtold

Since 1999 · 21–50 empl.

The company's core activity is the regulation and supervision of energy markets in France, particularly in the areas of electricity and natural gas, to protect consumer interests.

EVS Energieversorgung Schänis AG

Since 2002 · 11–20 empl.

EVS Energieversorgung Schänis AG plans, operates and maintains the electricity distribution network and supplies natural gas. It also provides multimedia services through its cable network, electrical installations, photovoltaic and storage solutions, and installation of electric-vehicle charging stations.

Natur Energie Kaltbrunn AG

Since 2005 · 1–10 empl.

Natur Energie Kaltbrunn AG operates renewable electricity generation facilities, including the Wilen and Bruggmühle small hydropower plants. Their operations are managed by Elektrizitätsversorgung Kaltbrunn AG.

Energie Rheintal AG

Since 2005 · 1–10 empl.

Energie Rheintal AG builds and operates district heating plants and networks that supply industrial, commercial and residential buildings. Its activities include using wood energy and waste heat, as well as services related to heat, solar energy and energy contracting.

Holzenergiezentrum Toggenburg Genossenschaft

Since 2007 · 11–20 empl.

Holzenergiezentrum Toggenburg Genossenschaft operates a wood-energy plant with a wood-chip heating system and combined heat and power generation, as well as a district heating network. Its fuel consists of untreated wood chips from regional forests and sawmills.

Kraftwerk Burentobel AG

Since 2007 · 11–20 empl.

Kraftwerk Burentobel AG operates two small hydropower plants to generate electricity. The Burentobel and Grafenau run-of-river plants harness the water of the Sitter.

Rovi Energie AG

Since 2010 · 1–10 empl.

Rovi Energie AG develops technical solutions and supports projects in bioenergy and renewable gases. Its services include advice on biogas production and upgrading, digestate processing and carbonization, as well as project support from concept studies through implementation.

gommisWALDKraft AG

Since 2011 · 1–10 empl.

gommisWALDKraft AG operates a wood-chip heating plant connected to a district heating network, supplying heat to connected buildings. The heat produced is carbon-neutral.

ENG, Erneuerbare Energie-Nutzungsgesellschaft AG

Since 2011 · 1–10 empl.

ENG, Erneuerbare Energie-Nutzungsgesellschaft AG plans, constructs and operates hydropower plants. It provides services such as preliminary studies, project planning and permitting, tendering, construction management and commissioning, as well as maintenance, operation and commercial management, with activities mainly in eastern Switzerland.

MSM Energie GmbH

Since 2013 · 1–10 empl.

MSM Energie GmbH rents out apartments and provides heat contracting for properties. Heat for space heating and hot water is supplied through a district heating system fuelled by wood chips.

Wärmeverbund Rüthi AG

Since 2013 · 11–20 empl.

Holzenergie Delta AG

Since 2015 · 1–10 empl.

Holzenergie Delta AG operates a district heating network supplied by a central plant that generates energy from wood chips. The network delivers heat for space heating and hot water to connected properties.

Wärmeverbund Kaltbrunn AG

Since 2016 · 1–10 empl.

Alpa Fernwärme AG

Since 2019 · 11–20 empl.

Alpa Fernwärme AG develops, manufactures and commissions district heating compact substations. Its services include complete district heating stations, individual components, planning, installation and a 24-hour on-call service.

Wasserstoffproduktion Ostschweiz AG

Since 2019 · 51–100 empl.

Wasserstoffproduktion Ostschweiz AG produces hydrogen using renewable electricity and supplies it for hydrogen refuelling stations. Its production facility supports the supply of regionally produced hydrogen.

Pizol Energie AG

Since 2021 · 11–20 empl.

Pizol Energie AG operates a wood-fired heating plant and a district heating network. It produces renewable heat, using mainly untreated wood chips from regional forests, landscape maintenance and sawmills.

Elektrizitätsversorgung Kaltbrunn AG

Since 1947 · 21–50 empl.·4.3(6)

Elektrizitätsversorgung Kaltbrunn AG supplies households, businesses and public institutions with electricity and natural gas. Its services also include electrical and telecommunications installations, a fibre-optic network and energy-related services.

Martin Zeller AG, Elektrizitätswerk

Since 1979 · 1–10 empl.·4.8(6)

Martin Zeller AG, Elektrizitätswerk supplies electricity to residential and business customers and produces renewable electricity at its own hydropower plants. It also operates the electricity distribution network and public street lighting in its service area.

toggenburg energie finanz ag

Since 2010 · 1–10 empl.·4.5(4)

toggenburg energie finanz ag provides energy advice, project support and educational programmes focused on renewable energy, energy efficiency and guidance on financial incentives and funding options.

Elektrizitätswerk Uznach AG

Since 1941 · 21–50 empl.·4.4(7)

Elektrizitätswerk Uznach AG supplies households, commercial businesses and industry with electricity, and plans, builds and operates electricity networks and facilities. It also advises on, plans and implements building technology solutions, including photovoltaics, battery storage, e-mobility and electrical installations.

Förderverein energietal toggenburg

Since 2010 · 11–20 empl.·4.5(4)

Förderverein energietal toggenburg promotes efficient energy use and local, carbon-neutral energy production in the Toggenburg region. Through contributions from members and partners, the association supports energy projects and regional initiatives.

Technische Betriebe Flawil (TBF)

Since 2016 · 21–50 empl.·3.7(3)

Technische Betriebe Flawil (TBF) supplies households, businesses and industry with electricity, drinking water, gas and communications services via a fibre-optic network. The public-sector institution also operates and maintains utility networks and public lighting.

Kraftwerk Trempel AG

Since 1993 · 1–10 empl.·5.0(1)

Kraftwerk Trempel AG operates a hydropower plant to generate electricity. It also owns and rents out a former textile factory used as a cultural and business centre.

see energie ag

Since 2021 · 1–10 empl.

see energie ag develops and operates energy facilities and pipeline networks for heating and cooling. It uses water from Lake Constance and heat pumps to supply energy to connected properties.

Säntis Energie AG

11–20 empl.·4.8(6)

Säntis Energie AG supplies gas and biogas to households, businesses and industry, and operates gas networks. Its activities also include maintaining gas infrastructure and advising on heating and energy solutions and building energy certificates.

GRAVAG Energie AG

Since 1979 · 21–50 empl.·2.7(9)

GRAVAG Energie AG supplies and trades energy and provides energy services and heating solutions. The company operates and maintains gas distribution networks, installs heating systems, and supplies natural gas and biogas to households, businesses and industry.

Rhy Biogas AG

Since 2007 · 1–10 empl.·3.7(3)

Rhy Biogas AG operates a biogas plant that processes organic materials such as slurry, manure, green waste, plant residues and kitchen waste. The biogas produced is purified and fed into the gas network, while the digestate can be used as fertiliser.

EVS AG

Since 1992 · 11–20 empl.·5.0(1)

EVS AG builds and maintains drinking-water supply pipelines and facilities, as well as infrastructure for gas-energy supply. Its activities include operating gas networks and constructing utility pipelines for gas and water.

Quellfrosch GmbH

Since 2024 · 1–10 empl.

Quellfrosch GmbH plans and builds small hydropower plants and photovoltaic systems. It manufactures turbines, Coanda water intakes and control systems, and provides feasibility studies and consulting on electricity generation from water and energy management.

Windpark Wartau AG

Since 2025 · 1–10 empl.

Windpark Wartau AG is developing a project for a wind farm with three planned turbines to generate renewable electricity. The company is assessing its feasibility and plans to build and operate the turbines.

Murg Flums Energie

Since 2020 · 21–50 empl.·1.0(1)

Murg Flums Energie generates electricity from regional hydropower and operates an electricity distribution network. It also supplies drinking water to Murg.

Conversio International AG, Schaanwald (FL), Zweigniederlassung Thal

Since 2025 · 1–10 empl.

Conversio International AG, Schaanwald (FL), Zweigniederlassung Thal plans, installs and services photovoltaic systems, battery storage and integrated energy solutions. Its services also include electrical installations and charging stations, heating and climate technology, and small hydropower plants.

Elektro-Genossenschaft Ulisbach

Since 1950 · 1–10 empl.·1.0(2)

Elektro-Genossenschaft Ulisbach supplies the Ulisbach area with electricity. Its activities include handling enquiries about building connections and photovoltaic systems, and providing information on electricity tariffs and technical connection requirements.

Solarhut GmbH

1–10 empl.

Solarhut GmbH operates Zcash mining using Swiss hydropower and rents racks for hosting and data-centre infrastructure. The company also sells solar materials and equipment, including solar panels, inverters and battery storage.

Elektrogenossenschaft Moos-Dieselbach

Since 1930 · 1–10 empl.