Solar panels do affect power generation efficiency after cleaning, and this impact is positive.
Specifically, the cleaned photovoltaic panels can receive solar radiation more effectively, thereby enhancing the photoelectric conversion efficiency and increasing power generation. Dust, dirt and other impurities on the surface of photovoltaic panels can block the penetration of sunlight, resulting in a reduction in the amount of solar radiation received by the photovoltaic panels. After cleaning, these impurities are removed, and the light transmittance of the photovoltaic panels is improved, thus enabling them to receive more solar radiation.
The accumulation of dust and dirt not only affects the light transmittance of photovoltaic panels but also increases their thermal resistance, thereby impacting their heat dissipation function. After cleaning, the thermal resistance of the photovoltaic panels is reduced, and the heat dissipation effect is improved, which helps maintain the working temperature of the photovoltaic panels and enhance the photoelectric conversion efficiency.
In addition, the long-term accumulation of dust and dirt may cause corrosion and damage to the surface of photovoltaic panels, affecting their optical performance and power generation efficiency. After cleaning, these potential risks of corrosion and damage are reduced, which helps to extend the service life of photovoltaic panels and maintain their power generation efficiency.
Based on experimental data and actual case analysis, the power generation of photovoltaic panels after cleaning usually increases significantly. The specific improvement ratio varies depending on the type, thickness of the dirt and climatic conditions. Generally speaking, after removing the dust and dirt on the surface of photovoltaic panels, the power generation efficiency can be increased by 5% to 30%. This means that under the same sunlight conditions, the cleaned photovoltaic system can generate more electricity, thereby improving energy utilization efficiency.
Therefore, to ensure the cleanliness and power generation efficiency of photovoltaic panels, it is recommended to clean them regularly.
