Publication: Analysis of shadowing losses in the rear side of bifacial photovoltaics with direct and diffuse radiation
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Date
2023-08
Authors
Muhamad Firdaus bin Zakaria
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Abstract
The bifacial solar panel is one of the latest technology solar panels that attract a lot of interest from PV industries since it has greater output power compared with conventional solar panels for similar size module. This is due to the bifacial solar panel can capture greater light spectrum from the front side and rear side of the solar panels. However, there are constraints toward the PV solar panel such as shadowing effect that will reduce the output power from solar panel and create hotspot effect. In this research, the shadowing effect toward bifacial solar panel will be analyzed especially at rear side of solar panel that rarely been investigated. The percentage of shadow area at the front side and rear side of bifacial solar panel will be controlled variable in this study. For the rear side of solar panel, the research will be repeated on the white surface, diffuse metallic reflector and mirror reflector. The result shadowing effect on front side of bifacial solar panel show shadowing effect give huge impact toward output power produced from bifacial solar panel even the 5% of shadow covering the area of the solar panel affected on the Isc reduction for 35.9%. The result shadowing effect at rear side of bifacial solar panel show shadowing effect does not give huge impact toward output power produced from bifacial solar panel even 80% of the areas for the rear side of solar panel been covered shadow only affect less than 5% for Isc reduction observed with difference types of surface reflector. Observation in this research show the highest average values for irradiance reflected on the ground is the mirror reflector (641.1W/m2) followed by metallic reflector (457.8W/m2), white reflector (352.9W/m2), concrete surface (170.8W/m2).