Rosi: Recycling Silicon Waste to Cut Solar Panel Costs and Emissions
French startup Rosi, founded in 2017, has developed a specialized process to recover high-purity silicon and other valuable metals from waste generated during photovoltaic panel manufacturing. This innovation targets a critical inefficiency in the solar industry: a significant portion of the ultra-pure silicon used in solar cells is lost as sawdust (kerf) during the wafer-cutting phase.
By extracting and purifying this silicon waste, Rosi enables its reintegration into the production of new solar panels. The company states this approach delivers a triple benefit: it reduces manufacturing costs by reclaiming expensive materials, slashes industrial waste, and lowers the carbon emissions associated with producing virgin silicon. The process also recovers silver and copper from the panels' conductive ribbons.
The technology positions Rosi as a key player in the push for a circular economy within the renewable energy sector, addressing both the economic and environmental footprint of solar power.