Extracting Cell Level Characteristics from Photovoltaic Module Electroluminescence Images
Dylan J Colvin, Eric J Schneller, Kristopher O Davis
University of Central Florida, Orlando, FL, United States

Electroluminescence (EL) images are typically taken to examine photovoltaic (PV) modules. This work develops a method of extracting cell level characteristics from module level images. This EL sweep method takes images at various injection levels and analyzes them to extract cell dark I-V data. Challenges are discussed along with actual and potential solutions to further improve the method’s accuracy and precision. It has been shown that the EL sweep results are in relative agreement with cell measurements; however, improvements are in the process.