The purpose of this study was to evaluate the influence of module temperature on the efficiency of polycrystalline (p-Si),monocrystalline (m-Si), amorphous (a-Si) and thin film photovoltaic modules at the outdoor environment of Nawabshah city Pakistan.The experimental setup was made and installed over the top roof of departmental building. Weather conditions, such as global solarradiation, ambient temperature, wind speed and relative humidity; power output and temperature of all selected four types of moduletechnologies were measured at the site by logging data. Then, the power output of the modules was normalized because of different ratedpower of photovoltaic modules for comparison purpose. Results revealed that less temperature impact was noted from thin film moduleand thus it gave more normalized power with 45.6% among other examined modules. On the basis of overall efficiency, p-Si, m-Si, a-Siand thin film modules gave 92.4%, 93.7%, 94.4% and 95.4% yearly average normalized efficiencies respectively. It was found thattemperature has more impact on the efficiency of other examined modules compared to thin film modules. Thus, it is concluded from thestudy that thin film module is better at the outdoor environment of Nawabshah.
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