What is the performance of bifacial photovoltaic (PV) modules beyond ideal conditions? This question is explored in the study "Evaluation of the Bifaciality Coefficient of Bifacial Photovoltaic Modules under Real Operating Conditions".

The bifaciality coefficient, crucial for PV system design, is traditionally defined under Standard Test Conditions (STC). Findings reveal a commendable alignment between experimental and manufacturer-indicated values when translated to STC, showcasing the modules' manufacturing quality controls. Key insights include a linear decrease in the operating bifaciality coefficient with diminishing irradiance levels. Sunny days exhibit higher bifaciality, while on cloudy days, the average bifaciality factor dips.

The study recommends assessing the coefficient during central daylight hours on sunny days for more accurate results. 

Image: tawatchai07 on Freepik