The TOPCon modules in the glass-foil version are also available as SOLARWATT Panel classic 3.0 modules in pure and black (up to 450 Wp each) with a 35 mm aluminium frame. Solarwatt provides a 30-year product and performance guarantee for the glass-glass modules. "Even after three decades, we can still guarantee performance of at least 90 per cent for the glass-glass modules. Homeowners can therefore look forward to an extremely long product service life and benefit from the advantages of solar power generation in the long term." Says module expert Kuschmann. The product guarantee for glass-foil modules is 20 years, while the performance guarantee is 25 years.