Validation of Advanced Photovoltaic Module Materials and Processes by Combined-Accelerated Stress Testing (C-AST)
Katy Hartman1, Peter Hacke2, Michael Owen-Bellini2, Yang Jin1, Malcolm Cummings1, Al Taylor1, Jaco Pretorius1, Les Fritzemeier1
1Tessolar Inc., Woburn, MA, United States
/2NREL, Golden, CO, United States

Tessolar module technology was developed to allow the incorporation of 5 incremental module material innovations. Combined, these innovations may improve the efficiency and durability of the standard silicon cell module. The innovations evaluated are: electrically conductive adhesive (ECA) replacing soldering of tabbing ribbons, light-capturing ribbon (LCR), silicone encapsulant, 2mm front glass with backsheet, and a polymer-composite module frame. Tessolar-constructed individually encapsulated cells incorporating the material innovations are used to assemble 60-cell modules. 2x2 cell mini-modules of the same materials were produced for combined-accelerated stress testing (C-AST). C-AST results demonstrate that the 2x2 cell mini-module of Tessolar construction out-performed both an ECA+EVA mini-module and a standard solder+EVA mini-module in power production over 108 cycles.