Energy Suppliers 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.

The core activity of SN Energie is the generation, transmission and distribution of electrical energy, particularly through the operation of power plants, photovoltaic systems and other renewable energy sources. The company also provides services in the field of energy trading and energy distribution.

Fernheizung Breite AG

Since 1991 · 1–10 empl.

The core activity of Fernheizung Breite AG is the production of heat energy from wood chips for the supply of buildings in the Altstätten region.

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.

The core activity of Energieversorgung Schänis AG (EVS) consists of planning, operating and maintaining the electrical distribution network and gas supply in the municipalities of Schänis, Rufi and Maseltrangen. This also includes providing electricity and gas products, installing and maintaining electrical systems, photovoltaic systems and e-charging stations, as well as advising and supporting the use of renewable energies.

Natur Energie Kaltbrunn AG

Since 2005 · 1–10 empl.

Natur Energie Kaltbrunn AG owns small hydropower plants and produces renewable electricity from hydropower. Elektrizitätsversorgung Kaltbrunn AG (EVK) serves as the operator for the Wilen and Bruggmühle plants.

Energie Rheintal AG

Since 2005 · 1–10 empl.

The core activity of NRG Holding AG is the generation and distribution of heat energy, particularly through the operation of district heating networks and heating plants, which are powered by wood chip firing systems and other environmentally friendly technologies. The company also offers services such as construction and maintenance of energy plants, contracting, waste heat utilization and wood reception. Additionally, the company is active in the solar energy sector and operates photovoltaic systems.

Holzenergiezentrum Toggenburg Genossenschaft

Since 2007 · 11–20 empl.

The core activity of Holzenergiezentrum Toggenburg is the generation of energy through the combustion of wood (chip heating) and the distribution of thermal energy to connected customers through a district heating network. The company operates a wood-fired power plant with chip heating and combined heat and power generation, as well as a district heating network that supplies Nesslau and Neu St. Johann.

Kraftwerk Burentobel AG

Since 2007 · 11–20 empl.

The core activity of Kraftwerk Burentobel AG is the generation of electrical energy through the operation of two small hydroelectric power plants on the Sitter, namely the Kraftwerk Burentobel and the Kraftwerk Grafenau. The power plants utilize the water power of the Sitter to generate electricity through Kaplan turbines, which is promoted within the framework of the Swiss feed-in tariff.

Rovi Energie AG

Since 2010 · 1–10 empl.

The core activity of rovi energie AG is the development and implementation of solutions for energy generation and residual material utilization, particularly in the field of biogas production and processing, as well as gas infrastructure and hydrogen technology. The company supports its partners and customers in the development of concepts, implementation and distribution of technologies and solutions in these areas.

gommisWALDKraft AG

Since 2011 · 1–10 empl.

gommisWALDKraft AG operates a wood‑chip heating plant connected to a district heating network. The system supplies heat to schools, sports halls, residential buildings, municipal facilities and commercial premises via a network of about 4,000 metres and provides CO2‑neutral heat to its customers.

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.

The core activity of MSM Energie GmbH is the production and supply of CO2-neutral heat energy through a district heating system powered by wood chips from the forests of Ernetschwil, as well as the rental of apartments in Ernetschwil.

Wärmeverbund Rüthi AG

Since 2013 · 11–20 empl.

The company's core activity is the management and exploitation of municipal assets, in particular alpine and forest areas, as well as the provision of services in the fields of forestry and the rental of parking spaces and real estate.

Holzenergie Delta AG

Since 2015 · 1–10 empl.

The core activity of Holzenergie Delta AG is the generation and distribution of heat energy through the combustion of wood, in particular through the operation of a district heating plant and a district heating pipeline network.

Wärmeverbund Kaltbrunn AG

Since 2016 · 1–10 empl.

Wärmeverbund Kaltbrunn AG is not described with its own company information on the Kaltbrunn municipal website. The page lists local parties and corporations in Kaltbrunn, including the Wasserkorporation Kaltbrunn, but does not provide separate details about this company.

Wasserstoffproduktion Ostschweiz AG

Since 2019 · 51–100 empl.

The core activity of Wasserstoffproduktion Ostschweiz AG is the production of hydrogen as a future energy carrier for mobility, particularly for the operation of hydrogen-powered vehicles. The company makes the produced hydrogen available at AVIA hydrogen filling stations to offer a sustainable alternative to fossil fuels.

Pizol Energie AG

Since 2021 · 11–20 empl.

The core activity of Pizol Energie AG is the production and supply of renewable heat energy through the operation of a wood-fired power plant in Wangs. The company primarily uses untreated wood chips from regional forests, landscape maintenance and sawmills as fuel and operates a district heating network to deliver the produced heat energy to customers in the surrounding municipalities of Wangs, Mels and Sargans.

Elektrizitätsversorgung Kaltbrunn AG

Since 1947 · 21–50 empl.·4.3(6)

The core activity of Elektrizitätsversorgung Kaltbrunn AG (EVK AG) encompasses the reliable supply of private customers, commercial enterprises, administrations, schools, agriculture and medium-sized industry with electricity and natural gas. This also includes electrical and communication installations, property management, the operation of an electrical specialist store, as well as the rental of aerial lifts.

Martin Zeller AG, Elektrizitätswerk

Since 1979 · 1–10 empl.·4.8(6)

The company's core activity is electricity supply.

Technische Betriebe Flawil (TBF)

Since 2016 · 21–50 empl.·3.7(3)

The core activity of the company "Technische Betriebe Flawil" is to supply the municipality of Flawil with various services and products, in particular: electricity supply, water supply, gas supply, district heating supply, and fiber-optic and telecommunications services (FTTH). The company also offers additional services such as energy consulting, project management and implementation in the field of energy economics, as well as technical services such as electrical engineering and implementation.

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)

The core activity of Elektrizitätswerk Uznach (EWU) is the provision of services and solutions in the field of energy supply, particularly in the areas of: electricity supply, network construction, metering, control and monitoring systems, energy systems, photovoltaics, battery storage, e-mobility, energy management, service and maintenance, electrical installations, and building technology. The company also offers consulting and planning services for optimal energy systems and promotes environmentally friendly and sustainable energy supply.

Förderverein energietal toggenburg

Since 2010 · 11–20 empl.·4.5(4)

Förderverein energietal toggenburg promotes efficient energy use and local CO2‑neutral energy production. The association initiates and supports energy projects, provides educational and advisory services, publishes informational materials, and cooperates with partners and sponsors to advance local energy initiatives.

Kraftwerk Trempel AG

Since 1993 · 1–10 empl.·5.0(1)

Kraftwerk Trempel AG operates a hydropower plant and manages a former textile factory converted into a commercial and cultural centre. The plant has an installed capacity of 1,800 kW, produces about 8 million kWh annually using two Francis turbines, and feeds its electricity into the national grid.

see energie ag

Since 2021 · 1–10 empl.

The core activity of see energie ag is the extraction of thermal energy from Lake Constance, whereby the lake water is sucked in by electric pumps, filtered through heat exchangers and then returned to the lake, removing around 3° Celsius in the process. This procedure serves as an alternative to conventional oil and gas heating systems and aims to contribute to reducing CO2 emissions.

Säntis Energie AG

11–20 empl.·4.8(6)

The core activity of Säntis Energie AG is energy supply, particularly in the gas sector, including delivery, trading and consulting for heat and energy solutions, as well as the operation and maintenance of energy distribution networks.

GRAVAG Energie AG

Since 1979 · 21–50 empl.·2.7(9)

The core activity of GRAVAG Energie AG and GRAVAG Thermo is energy supply and service, particularly in the planning, installation, maintenance and repair of heating and energy systems, such as heat pumps, gas and oil heating systems, pellet heating systems, hybrid systems, power-generating heating systems, combined heat and power (CHP) systems and photovoltaic systems. In addition, the company offers energy consulting, energy analysis and optimization as well as the sale of energy.

Rhy Biogas AG

Since 2007 · 1–10 empl.·3.7(3)

The core activity of Rhy Biogas AG is the production and trade of biogas.

EVS AG

Since 1992 · 11–20 empl.·5.0(1)

The core activity of EVS AG is the construction, operation and maintenance of water and gas pipelines, including industrial pipeline construction and house connections. The company also offers services in the field of gas energy, such as gas sales, installation of heating systems and replacement of heating systems.

Quellfrosch GmbH

Since 2024 · 1–10 empl.

Quellfrosch GmbH plans and builds small hydropower plants, Coanda water intakes, turbines and the related electrical control systems. The company also offers photovoltaic systems, feasibility studies and consulting on using drinking water and wastewater for electricity generation.

Murg Flums Energie

Since 2020 · 21–50 empl.·1.0(1)

The core activity of Murg Flums Energie is the production and distribution of hydroelectric power as well as the water supply for the municipalities of Murg and Flums.

Windpark Wartau AG

Since 2025 · 1–10 empl.

Windpark Wartau AG plans and develops a wind energy project in the Rheinau area in Trübbach/Weite. The company is responsible for assessing, planning and later realising and operating a wind farm to produce renewable electricity for the municipality of Wartau.

Elektro-Genossenschaft Ulisbach

Since 1950 · 1–10 empl.·1.0(2)

The core activity of Elektrogenossenschaft Ulisbach is the electricity supply for the municipality of Ulisbach. The company delivers electricity to its customers, thereby providing a fundamental infrastructure for the municipality.

Conversio International AG, Schaanwald (FL), Zweigniederlassung Thal

Since 2025 · 1–10 empl.

Conversio International AG, Schaanwald (FL), Zweigniederlassung Thal provides services in electrical engineering, energy technology, and trading. The company plans, installs, and maintains systems for photovoltaics, storage systems, small hydropower, electrical installations, charging stations, and heating and climate technology.

HV-Fitube Kilic

Since 2026 · 1–10 empl.

HV-Fitube Kilic is a Swiss company focused on energy consulting, trading, and engineering support. It assists energy projects with strategic advisory services, procurement, and access to markets across multiple regions.

Alpa Fernwärme AG

Since 2019 · 11–20 empl.

The core activity of Alpa Fernwärme AG is the development, manufacture and commissioning of district heating compact stations.

Elektrogenossenschaft Moos-Dieselbach

Since 1930 · 1–10 empl.