First of all, the power generation efficiency of solar panels on cloudy days is far lower than when there are sunny days, and secondly, solar panels will not generate electricity on rainy days, which is also determined according to the principle of solar power generation.
The power generation principle of solar panels The sunlight shines on the semiconductor pn junction to form new hole-electron pairs. Under the action of the electric field of the pn junction, the holes flow from the n region to the p region, and the electrons flow from the p region to the n region. After the circuit is formed, a current is formed. This is how photoelectric effect solar cells work. This also shows that the most important and most important thing for solar panel power generation is sunlight. Secondly, in the case of ensuring sufficient sunlight, let's compare which single-polycrystalline solar panel has higher power generation efficiency? The conversion efficiency of monocrystalline solar panels is about 18.5-22%, and the conversion efficiency of polycrystalline solar panels is about 14-18.5%. In this way, the conversion efficiency of monocrystalline solar panels is higher than that of polycrystalline solar panels. Secondly, the low light performance of monocrystalline solar panels will be stronger than that of polycrystalline solar panels, that is to say, on cloudy days and when the sunlight is not very sufficient, the power generation efficiency of monocrystalline silicon solar panels will also be higher than that of polycrystalline solar panels. high power generation efficiency.
Finally, while solar panels will still work if light is reflected or partially blocked by clouds, their energy production capacity will be diminished. On average, solar panels will generate between 10% and 25% of their normal output during periods of heavy cloud cover. Along with the clouds is usually rain, here's a fact that might surprise you. Rain actually helps solar panels work more efficiently. That's because rain washes away any dirt or dust that has collected on the panels, allowing them to absorb sunlight more efficiently.
Summary: Solar panels will not generate electricity on rainy days, and the power generation efficiency of monocrystalline solar panels on cloudy days will be higher than that of polycrystalline solar panels.
Post time: Dec-30-2022