Fronius is an Austrian manufacturer of solar inverters. The company was founded in 1945 and has three business units – welding technology, battery charging technology and photovoltaics. Around 6,700 employees worldwide, a current export share of 90 per cent and 1,752 active patents: that's us, that's Fronius. Founded in 1945 as a regional one-man business, we are now a global player – a fact that is impressively demonstrated by our 37 international subsidiaries and our network of. ABB, headquartered in Switzerland, is a multinational corporation with a strong presence in the renewable energy sector, particularly in solar power solutions. ABB has been developing innovative and reliable solar inverters for both residential and industrial applications for over a decade. Which. Austrian Engineering Excellence Delivers Superior ROI: Fronius Solar systems consistently achieve 6-12 months faster payback periods compared to competitors, with 99%+ uptime rates and 15-20 year lifespans backed by comprehensive warranties that increased to 12 years in the USA as of March 2024.