Which is more efficient, polycrystalline solar panels or monocrystalline solar panels on rainy days?
Firstly, the power generation of solar panels on cloudy days is much lower than when there is sunshine on sunny days, and secondly, electricity does not occur in solar panels on rainy days, which is also determined by the principle of solar power generation.
How solar panels generate electricity
Sunlight shines on the semiconductor p-n junction to form new hole-electron pairs. Under the effect of the p-n junction electric field, 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 turned on, a current is formed. This is how the photoelectric effect solar cell works. This also shows that the most important thing for solar panels to generate electricity is sunlight. Without a little sunlight, other things, no matter how good they are, are useless.
Secondly, in the case of ensuring sufficient sunlight, we then compare the power generation of mono-polycrystalline solar panels which is higher? The conversion power of monocrystalline solar panels is around 18.5-22%, and the conversion power of polycrystalline solar panels is around 14-18.5%, so look at the conversion power of monocrystalline solar panels is higher than that of polycrystalline solar panels. Secondly, the low light of monocrystalline solar panels will be stronger than the low light of polycrystalline solar panels, which means that on cloudy days, when the sunlight is not very sufficient, the power generation of monocrystalline solar panels will also be higher than the power generation of polycrystalline.
After Z, although solar panels will still be able to operate when light is reflected or partially blocked by clouds, their energy production capacity will be diminished. On average, solar panels will produce 10 to 25 percent of their normal power production when cloud cover is severe.
With the rain that usually accompanies cloud cover, here's a reality that may surprise you. Rain actually helps solar panels operate more efficiently. This is due to the fact that rain washes away any dirt or dust that collects on the panels, allowing them to absorb sunlight more efficiently.
In summary: solar panels do not generate electricity on rainy days, and monocrystalline solar panels will generate more power than polycrystalline on cloudy days.
