光伏发电的旺季并不是夏天

Core Viewpoint - The photovoltaic power generation efficiency is not highest in summer as commonly believed, but peaks in March and October due to the angle of sunlight and atmospheric conditions [1][2]. Group 1: Photovoltaic Power Generation Efficiency - The photovoltaic power generation at the Xishe site reached 47.85 million kWh in March 2024 and 40.09 million kWh in October, while only 36.20 million kWh in July, which is comparable to winter levels and about 15% to 20% lower than spring and autumn [1]. - The angle of sunlight hitting the photovoltaic panels is crucial for energy conversion efficiency, with spring and autumn having longer periods of optimal angles compared to summer [2]. - Air quality significantly affects photovoltaic efficiency, as haze and cloud cover can reduce sunlight intensity, while improved air quality in Fushun has indirectly enhanced photovoltaic generation [2]. Group 2: Maintenance and Operational Factors - The cleanliness of photovoltaic panels is vital for maintaining high efficiency, with clean panels potentially increasing output by about 5% compared to dirty ones [3]. - The maintenance strategy includes relying on rainwater for cleaning during spring and summer, while winter conditions help in self-cleaning through melting snow [3]. - Temperature has a minimal impact on photovoltaic efficiency under normal conditions, but extreme heat can negatively affect semiconductor performance [3].