Sonnenstromfabrik also offers its customers the option of extending the product guarantee for glass/foil modules to 25 years and for glass/glass modules to 30 years.

  Industry standard Excellent Glass/Glass Excellent
Product guarantee max. 10 years 20 years 12 years
Optional extension
of product guarantee
no yes, optional 30 years yes, optional 25 years
Performance guarantee in steps linear linear
Performance guarantee after 1 year no 97% 97%
Performance guarantee max. 20 years 30 years, 87% 26 years, 80%
Annual max degradation
after year 2
n/a 0.35% 0.68%
Total Care protection no yes, optional yes, optional