Sun, a free source of energy, has moved the world to consider photovoltaic (PV) system as green renewable energy since fossil fuel power plant accounts for a significant share of greenhouse gas (GHG) emissions across the globe. The output of the PV system is limited to many factors; however, the acute accuracy of orientation (tilt and azimuth) angles exposes the PV surfaces to high doses of solar radiations. Which increases the PV system output; in turn GHG mitigation potential. This paper draws a relationship between accuracy of orientation angles impact on PV system's GHG mitigation potential. For reference, the accuracy of orientation angles in Pakistan's Capital increases the annual average daily solar radiations level from 4.02 (horizontal surface) to 4.39 (−33.6 tilt and 180 azimuth) kWh/m2/d. Accuracy of orientation angles on multiple end energy users (equivalent to 1 MW) PV system has potential to avoid additional 65.1 and 22.6 tonnes of CO2 equivalent and production of 158987.13 and 55,120.1 kW h compared with a same size PV system with horizontal surface and 33.6 tilt angle (equivalent to location's latitude), respectively. PV system orientation angles accuracy has the potential to avoid tonnes of GHG emissions without any investment, operation and maintenance costs.

太阳是一种免费的能源，自从化石燃料发电厂在全球温室气体（GHG）排放中占很大比重以来，全世界就已经将光伏（PV）系统视为绿色可再生能源。光伏系统的输出受许多因素的限制。但是，定向角（倾斜角和方位角）的精确度使PV表面暴露于高剂量的太阳辐射中。这增加了光伏系统的输出；反过来减少温室气体的潜力。本文得出了定向角精度对光伏系统温室气体减排潜力的影响之间的关系。作为参考，巴基斯坦首都的定向角精度使年平均日太阳辐射水平从4.02（水平表面）增加到4.39（-33.6倾斜和180方位角）kWh / m2 / d。与具有水平表面和33.6倾斜度的同尺寸光伏系统相比，在多个最终能源用户（相当于1 MW）的光伏系统上的定向角精度有可能避免额外的65.1和22.6吨CO2当量，并避免产生158987.13和55,120.1 kW h角度（相当于位置的纬度）。光伏系统的定向角度精度有可能避免大量的温室气体排放，而无需任何投资，运营和维护成本。