A spring rain brings warmth, and recently, various parts of the country have begun to enter a rain rain rain rain mode. It is said that spring rain is as expensive as oil, but for many users who are preparing or have already installed photovoltaics, the sky that has not cleared up for a long time and the continuous rain have really worried them. How can we generate electricity without sunlight?

Firstly, we need to understand the principle of photovoltaic power generation? Photovoltaic power generation is the photoelectric effect of semiconductors. Photons shine on the surface of metals or semiconductors, and their energy is absorbed by electrons. When the absorbed energy is large enough, it can overcome the internal gravity of the object and leave the original surface as photoelectrons. The current formed by photoelectrons is called photocurrent.

Can electricity still be generated without the sun?

On rainy days, photovoltaic modules can still generate electricity under weak light, but the duration and intensity of light are reduced, resulting in a relative decrease in power generation. Rainy clouds block direct sunlight, resulting in a decrease in the amount of light received by photovoltaic panels. In addition, the water film formed by rainwater on the surface of photovoltaic panels will also reduce the transmittance of light, further reducing the amount of photovoltaic power generation. However, even in this situation, photovoltaic panels can still generate electricity using scattered and indirect light.

To cope with the impact of rainy weather on photovoltaic power generation, some measures can be taken, such as increasing the capacity of photovoltaic power generation systems and adjusting the angle to receive sunlight to the maximum extent possible; Install backup power sources to ensure the continuity of power supply; Consider grid connected systems to compensate for the impact of reduced electricity generation on rainy days. In addition, improving the efficiency of photovoltaic panels can also provide more power generation under limited sunlight conditions.

What are the benefits of rainy days for solar panels? It is well known that wind, sun, and dust accumulate on solar panels, which can also affect power generation efficiency. And rainwater can wash away the dirt and stains on the surface of the components, making it a comprehensive cleaning!