When photovoltaic modules are installed in the static window or façade, the solar radiation hardly falls perpendicularly on it. The deviation of radiation from perpendicular incidence incurred an additional loss of energy in photovoltaic systems known as an angular loss. This paper presents an assessment of the angular loss for the semi-transparent photovoltaic (STPV) module used in a vertical window system. All four geographical orientations have been considered in the analysis. Evaluation of angular loss with module transparency is one of the prime objective and contribution of this research. The analysis has been carried out using measured module characteristics and ‘EnergyPlus’ simulation software. In the study, the angular loss has found to be as high as 8.7% in the considered latitude. The analysis indicates that the angular loss becomes prominent for an angle of incidence (AOI) above 70°. With STPV module transparency, the angular loss has been found to vary by around 25%.

当将光伏模块安装在静态窗户或立面上时，太阳辐射几乎不会垂直落在其上。辐射与垂直入射的偏离导致能量的额外损失光伏系统称为角损失。本文介绍了垂直窗系统中使用的半透明光伏（STPV）模块的角损失的评估。分析中考虑了所有四个地理方向。利用模块透明性评估角损失是本研究的主要目标和贡献之一。分析是使用测量的模块特性和“ EnergyPlus”仿真软件进行的。在研究中，在考虑的纬度范围内，角损失高达8.7％。分析表明，对于大于70°的入射角（AOI），角损失变得尤为突出。使用STPV模块透明时，发现角损耗变化约25％。