30 YEARS PERFORMANCE GUARANTEE
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.
![](https://www.sonnenstromfabrik.com/assets/images/7/grafik_leistung_en-2ffbbdb9.jpg)
![](https://www.sonnenstromfabrik.com/assets/images/4/grafik_garantie_en-32cdc18d.jpg)
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 |