Snow and Wind Loading: 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. Task Group 7 has been inactive, but is discussing renewed work on understanding wind loading.
The early work of Task Group 7 supported development of a test for inhomogeneous snow loads. A draft of this is now being considered by IEC Technical Committee 82, Working Group 2 as IEC 62938. 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. IEC 61215 Ed. 3 will be clearer on the definition of minimum requirements.
This task group completed its initial action items and the group may 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