Influence of Selected Working Conditions on Electricity Generation in Bifacial Photovoltaic Modules in Polish Climatic Conditions

This paper discusses the conversion of solar irradiance energy into electricity. Double-sided (bifacial) panels are gaining increasing popularity in commercial applications due to the increased energy yield with a constant occupied mounting surface. However, the value of the additional energy yield produced by the back of the panel depends on several important factors. This paper presents the influence of working conditions on electricity generation in bifacial modules. This paper also investigates the influence of weather conditions, the module inclination angle, and the substrate beneath the panel surface on electricity generation. Fill factor and efficiency were calculated for each case included in the study scope. Based on the current voltage, power characteristics, and calculations, the module operation for different conditions was compared. It was observed that the optimal inclination angle to the surface is higher for the bifacial modules compared to the unilateral modules. The type of surface under the module has also been indicated to impact the amount of electricity generated. The additional energy yield associated with the panels' rear side accounts for 2% to more than 35% of the total power generated by a photovoltaic (PV) module. The unit cost of electricity generation in the analyzed cases was also determined.

Automated summary

This paper discusses the conversion of solar irradiance energy into electricity, focusing on the influence of working conditions, weather conditions, module inclination angle, and substrate on electricity generation in bifacial modules. It compares the performance of bifacial and unilateral modules, finding that optimal inclination angle is higher for bifacial modules. The additional energy yield from the rear side of panels accounts for 2% to over 35% of total power generated by a photovoltaic module. The unit cost of electricity generation in analyzed cases was also determined.