Progress Update: Task Group 7
Task Group 7 is focused on mechanical loading that causes cell cracking.
The standards for the type approval of PV modules (IEC 61215/61646) contain various tests inducing mechanical loads. This group originally focused on wind or snow loading and IEC Technical Committee 82 is discussing the proposal on snow loading.
The current focus of Task Group 7 is to better understand how mechanical loading leads to cell cracking.
A New Work Item was proposed to the IEC standards group (Technical Committee 82, Working Group 2) in June defining a new test method for non-uniform snow load simulation. Below are related publications developed by TÜV Rheinland.
- Experimental Testing of PV Modules Under Inhomogeneous Snow Loads
- Experimental Testing of PV Modules under Inhomogeneous Snow Loads
Furthermore, a proposal was made to WG2 to redefine the minimum requirements for resistance to hail impacts. The next draft of IEC 61215 Ed. 3 will be clearer on the definition of minimum requirements.
This task group has completed its current action items and the group will be inactive until new action items are identified. Special thanks to Joerg Althaus for leading the effort to quickly complete this work.
Faye Li — Yingli Solar