University of Tehran Journal of Solar Energy Research 2588-3097 11 3 2026 07 01 Impact of Ground Albedo on Monofacial and Bifacial PV Modules: A PVsyst-Based Performance Evaluation under South Indian Climate 3937 3951 107928 10.22059/jser.2026.408422.1690 EN Dinesh Manickam Department of Electrical and Electronics Engineering, Adhi College of Engineering and Technology, Kanchipuram, India 0000-0002-8461-790X Vijayaprabhu Arumugam Department of Electronics and Communication Engineering, Siddharth Institute of Engineering and Technology, Puttur, India 0000-0002-8728-7862 Thangalakshmi Sivalingam School of Marine Engineering and Technology, Indian maritime University, Maharashtra, India 0000-0003-4523-9210 Bhaskar Kosuru Bojji Raju Department of Electrical and Electronics Engineering, Adhi College of Engineering and Technology, Kanchipuram, India 0000-0003-2464-4110 Dinesh Babu Kesavan Department of Electronics and Communication Engineering, Adhi College of Engineering and Technology, Kanchipuram, India 0000-0001-7285-170X Abhishek Agarwal Department of Energy Technology, Tallinn University of Technology, 19086 Tallinn, Estonia 0000-0002-0900-6383 Journal Article 2025 12 19 This investigation evaluates the influence of rooftop reflectance on the performance of mono- and bifacial photovoltaic systems using a PVsyst-based simulation of a 125 kWp rooftop installation under tropical climatic conditions in southern India. Both photovoltaic technologies were analysed using identical electrical and geometric configurations so that rooftop albedo remained the only varying parameter. A reference albedo of 0.30 was considered for both technologies, while enhanced albedo scenarios of 0.50, 0.60, and 0.85 were evaluated for bifacial modules. Simulation results show that the monofacial system operating at an albedo of 0.30 generated 188.45 MWh/year with a performance ratio (PR) of 83.76%, whereas the bifacial configuration under identical conditions produced 187.11 MWh/year. As the rooftop albedo increased, the annual energy yield of the bifacial system increased to 187.86, 188.23, and 189.16 MWh/year for albedo values of 0.50, 0.60, and 0.85, respectively. This improvement was accompanied by a marginal reduction in PR from 83.17% to 82.83%, primarily due to higher operating temperatures associated with increased rear-side irradiance. The analysis further identifies an albedo-dependent performance transition threshold between 0.60 and 0.85, beyond which bifacial modules provide superior annual energy performance compared with monofacial modules. https://jser.ut.ac.ir/article_107928_4621550e81781ae69f07b7427596e876.pdf