Revolutionary DURAGlassX Technology by Swiss Solar: Initial Testing and Key Differences
15/01/2026
Swiss Solar introduces DURAGlassX — a next-generation tempered glass technology developed to significantly enhance mechanical strength, thermal resistance, and long-term durability of photovoltaic modules.
As reliability and service life requirements for PV systems continue to increase, Swiss Solar has invested in developing glass technology that outperforms conventional solutions across all critical parameters.
Why Glass Is a Critical Component of a Solar Module
Glass represents the first line of defense against:
- mechanical loads
- hail and wind impact
- temperature fluctuations
- moisture and chemical exposure
- ultraviolet radiation
Improvements in glass performance directly translate into longer module lifetime and more stable energy output.
What Is DURAGlassX
DURAGlassX is a double-tempered glass–glass structure (2.0 mm + 2.0 mm) engineered specifically for Swiss Solar modules.
The technology combines:
- optimized tempering process
- enhanced surface structure
- improved high-temperature stability
The result is a stiffer, more robust module construction.
Initial DURAGlassX Testing Results
During internal and certification testing, DURAGlassX demonstrated:
- hail impact resistance up to Ø45 mm at 23 m/s
- high thermal resistance with reduced deformation
- enhanced microcrack protection
- fire rating Class A
These values significantly exceed typical industry standards.
DURAGlassX vs Standard Tempered Glass
| Parameter | DURAGlassX (Swiss Solar) | Standard Tempered Glass / Glass-Backsheet |
| Glass structure | Double-tempered glass 2.0 + 2.0 mm | Single-tempered glass 3.2 mm + polymer backsheet |
| Mechanical strength | Enhanced structural rigidity | Standard resistance |
| Hail resistance | Ø45 mm at 23 m/s | Ø25 mm at IEC speed |
| Thermal resistance | High, reduced deformation | Medium, deformation risk |
| Fire rating | Class A | Class C |
| Microcrack protection | Maximum (cell shielding and surface stability) | Medium, higher microcrack risk |
| Moisture protection | Full glass seal, zero vapor diffusion | Polymer aging and permeability risk |
| UV / chemical resistance | High, long-term stability | Reduced over time |
| Rear-side transmission | Enables bifacial gain up to +25% | Light blocking, limited bifacial capability |
Practical Benefits
DURAGlassX provides:
- extended module service life
- lower risk of hidden defects
- stable electrical performance
- increased reliability in harsh environments
This is especially important for commercial and industrial PV projects.
Integration into Swiss Solar Product Lines
DURAGlassX is implemented in new Swiss Solar module series, including the PHANTOM lineup, combined with TOPCon Advanced solar cells and the reinforced AluForce frame technology.
Conclusion
DURAGlassX is not a cosmetic upgrade but a fundamental advancement in solar module durability and protection. It reflects Swiss Solar’s strategy of implementing technologies that deliver measurable technical benefits and long-term value for customers.