Enhanced Single Diode Model for Bifacial PV Module Incorporating Partial Shading

Bifacial photovoltaic (PV) technology, designed to harness solar energy from both the front and rear surfaces of solar modules, presents a promising avenue for enhancing solar energy capture. While the Single Diode Model (SDM) has been widely validated for monofacial PV modules, its accuracy in the context of bifacial modules remains underexplored. This paper presents an advanced SDM, originally tailored for mono facial solar cells, adapted to accommodate the unique characteristics of bifacial PV modules, including the incorporation of partial shading effects. The paper explores bifacial solar cell technologies, bifacial gain parameters, and the lEC TS 60904-1-2 specification, emphasizing the significance of accurate PV modeling in system simulation. The model's accuracy is validated using manufacturer datasheets, which includes variations in
$Isc$
(short-circuit current),
$Voc$
(open-circuit voltage), and Pmax (maximum power output) for different bifacial gains. Additionally, a modeling approach for partial shading is presented and validated using available experimental data from previous research.