Effect of Temperature on Electrical Parameters of Photovoltaic Module

Abstract

In this study, the temperatures of the front glass, back sheet, and solar cell (SC) in the rear electrical contact of the PV module during heating, and the open circuit voltage and short circuit current corresponding to these temperatures were experimentally investigated. Measurements were conducted in the city of Termez in conditions of an air temperature of 30ºC and solar radiation intensity of 850-950W/m2. Two mono c-Si PV modules with the same electric power were selected for the experiment. Three K-type chrome and alumn combined thermocouples were used to measure the temperatures in the layers of the first PV module. During the observations, it was found that the temperature of the PV module glass differs from the back sheet temperature by ~20ºC, and from the temperature of the back electrical contact of the SC by ~25ºC. Also, according to the temperature difference, the open circuit voltage of the PV module decreased from 21V to 19.3V, and the short circuit current increased from 0.65A to 0.75A. During the experiment, the values of electric power changed by ~11-11.6W.