Comparative analysis of bypass diode activation in bifacial PERC, TOPCon, and HJT PV modules under partial shading conditions

Conference proceedings article

Authors/Editors

Strategic Research Themes

Publication Details

Author list: Tanokkorn Chenvidhya, Manit Seapan, Panusorn Polchai, Watcharee Phojan, Yaowanee Sangpongsanont, Dhirayut Chenvidhya, Buntoon Wiengmoon

Publication year: 2026

Title of series: PVSEC-36, 2025 PROCEEDINGS The 36th International Photovoltaic Science and Engineering Conference

Number in series: -

Volume number: -

Start page: 60

End page: 61

Number of pages: 2

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Abstract

This study developed parametric models of bypass diode activation in PERC, TOPCon, and HJT modules using outdoor I–V measurements under controlled shading. The results show that diode behavior is strongly affected by shading location, severity, and module design. These insights support more accurate evaluation of shading tolerance and improved reliability assessment for advanced PV technologies.

Keywords

Diode Characteristics, Photovoltaic Cell, Solar photovoltaic