The success story of the family company based in Pettenbach starts in 1945 in the battery charging systems sector, in which Fronius is still today a leading European supplier. With innovative developments in welding technology, the company has become internationally successful and a world leader in this sector.

The Solar Electronics division was launched in 1992. The knowledge of energy conversion from the welding technology offered a solid foundation for the development of photovoltaic inverters, which are used for electricity production from solar energy. As one of the world's leading manufacturers of inverters, Fronius has now also moved into the market of the future - renewable energy.