Abstract
To demonstrate the power output characteristics of bifacial photovoltaic (bifi-PV) systems, we installed a couple of 3kW bifi-PV systems at northern snowy area located in Kitami city, Hokkaido, Japan. Both arrays are tilted 35 degrees, and directed to the south. And under the one of the array, crushed scallops' shells are laid down as a ground reflector for increasing the incident light to rear side of the bifacial PV modules. About a half years measurement (from the snowy winter season to the summer), we could make sure the high performance ratio at both of these arrays. The average of array performance ratio is 0.95 for without ground reflector, and 1.09 for with scallops' shells ground reflector. From this actual measurement data, we could confirmed that bifi-PV has a great potential in order to increase system performance ratio (especially using with ground reflector), and it is enough for practical use of commercial PV power plant even if snowy area.
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