Production-Line Binning Of Bifacial Cells Using Suns-Voc Analysis

Bifacial solar cells are becoming more common, but questions remain about how to effectively test them during production. IEC standards describe two equivalent methods for testing. We propose a measurement technique based on the equivalent intensity method, where bifacial cells are only illuminated on one side. Using data from a Suns-Voc analysis, with one flash data can be reported at 1 sun as well as the higher intensity representing the bifacial boost.