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.