Good practice

Biomass backed by geothermal and solar meet Fronius' energy needs

Biomass backed by geothermal and solar meet Fronius' energy needs
©tchara, image #142179690, 2017, source:
Energy, Carbon
Manufacturing of machinery and equipment, Metal and plastic processing
High cost
Annual saving:
20 - 40%
Payback time:
8 - 10 Year(s)
Total cost savings:
Cost savings thanks to a combination of renewable energy sources
Co2 emission reduction:
1 000 tonnes of CO2 per year (compared to natural gas)
Size of company:
Medium (less than 250)
Advancement in applying resource efficiency measures:
One off investment:

An energy trio...

  • Energy autonomy thanks to combined geothermal, biomass and solar power
  • Up to 80 % of heating by biomass-fired combined heat and power plant, ~20 % covered by geothermal

Fronius International, based in Pettenbach, Upper Austria, is active in the fields of welding technology, photovoltaics and battery charging technology.

In 2007, Fronius opened a new manufacturing and logistics unit in Sattledt, where more than 600 employees work. This site is a sustainable energy showcase, combining geothermal energy with biomass (wood chips) and solar power to reach energy autonomy for its heating and cooling.

Most of the heating needs for the Sattledt site are covered by the biomass-fired combined heat and power plant, together with geothermal energy. Additional natural gas covers peaks. A triple-stove system ensures optimal energy and resource efficiency, while minimising carbon emissions.

A contractor (Ing. Aigner GmbH) was commissioned for the installation, operation, maintenance, and functional and performance risk assessment of the biomass heating system currently used on the site.

Key result

Fronius has significantly reduced its CO2 emissions which is good for its 'green' image and translates directly into the company's corporate social responsibility and marketing efforts.  


"Up to 80 % of the heating for the Sattledt site is covered by a biomass-fired combined heat and power plant and up to 20 % is covered by geothermal energy. Photovoltaic systems are installed at almost all Fronius sites. The energy we produce in Austria alone makes up roughly the annual requirement of 250 households. Our Sattledt site, for example, has one of the largest systems in the whole of Austria and is a prime example of what is meant by sustainability..." - Fronius corporate values for sustainability

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