The lightshelf system, a sort of daylighting device, has been applied to improve the visual environment by optimal light distributions and intense illumination levels of an interior. Also, the photovoltaic is one of the most important sustainable technologies applicable to architectures. The purpose of this study was to evaluate basic data to develop the photovoltaic (PV)-integrated lightshelf systems for office buildings. The performance of PV lightshelves was evaluated by using 1/5 scaled model. The scaled office models were made and the field tests were experimented under clear sky according to installation conditions. The results have illustrated that the power performance of the PV lightshelves was excellent on the horizontal plane where the sunlight incidence occurred vertically, and that the larger the installation angle, the more rapid decrease in power performance was recorded. However, if the other performance including daylight and energy of a PV-integrated lightshelf should be considered, complementary research is necessary in any future study.
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