April 27, 2013
![](https://ases.org/wp-content/uploads/2017/05/40trina.jpg)
Trina Solar’s PDG5 is a UL/IEC frameless module and needs no grounding.
PDG5 comprises two layers of special 2.5-mm heat-strengthened glass.
With no plastic backsheet, PDG5 provides UL Fire Class A and reduces micro-cracking, PID, module warping and aging from UV, sand, acid, alkali and salt fog.