Extrapolating Accelerated UV Weathering Data: Perspective From PVQAT Task Group 5 (Presentation): NREL(National Renewable Energy Laboratory)

David Miller, Michael Kempe, Eleonora Annigoni, Amal Ballion, Jayesh Bokria, Laura Bruckman, David Burns, Lamont Elliott, Roger French, Sean Fowler, Xiaohong Gu, Christian Honeker, Hussam Khonkar, Michael Köhl, Peter Krommenhoek, Laure-Emmanuelle Perret-Aebi, Nancy Phillips, Kurt Scott, Fanny Sculati-Meillaud, Tsuyoshi ShiodaShigeo Suga, Shin Watanabe

Research output: NRELPresentation


Taskgroup 5 (TG5) is concerned with a accelerated aging standard incorporating factors including ultraviolet radiation, temperature, and moisture. Separate experiments are being conducted in support of a test standard via the regional sub-groups in Asia, Europe, and the United States. The authors will describe the objectives and timeline for the TG5 interlaboratory study being directed out of theUSA. Qualitative preliminary data from the experiment is presented. To date, the encapsulation transmittance experiment has: replicated behaviors of fielded materials (including specimen location- and formulation additive-specific discoloration); demonstrated coupling between UV aging and temperature; demonstrated that degradation in EVA results from UV- aging; and obtained good qualitativecomparison between Xe and UVA-340 sources for EVA. To date, the encapsulation adhesion experiment (using the compressive shear test to quantify strength of attachment) has demonstrated that attachment strength can decrease drastically (>50%) with age; however, early results suggest significant factor (UV, T, RH) dependence. Much remains to be learned about adhesion.
Original languageAmerican English
Number of pages23
StatePublished - 2015

Publication series

NamePresented at the 2015 NREL PV Photovoltaic Module Reliability Workshop, 24-27 February 2015, Golden, Colorado

NREL Publication Number

  • NREL/PR-5J00-63850


  • durability
  • indoor accelerated test
  • polymers
  • reliability


Dive into the research topics of 'Extrapolating Accelerated UV Weathering Data: Perspective From PVQAT Task Group 5 (Presentation): NREL(National Renewable Energy Laboratory)'. Together they form a unique fingerprint.

Cite this