Solar power generation can generate electricity on cloudy and rainy days, but if it encounters cloudy and rainy days, the normal operation of solar power generation panels will be affected.
Solar energy is energy coming from celestial bodies outside the earth (mainly solar energy). This is the enormous energy released by the fusion of the sun's hydrogen nuclei at ultra-high temperatures. humans come directly or indirectly from the sun.
Advantages and disadvantages of rooftop solar panels
On cloudy days, ultraviolet light will be significantly reduced. In the ultraviolet part, the light absorption coefficient of crystalline silicon is an order of magnitude higher. than that of amorphous silicon. In the visible light part, the absorption coefficient of amorphous silicon is better than that of crystalline silicon. Therefore, thin-film solar cells can still produce electricity on cloudy days, but crystalline silicon cells cannot. Of course, the photovoltaic effect exists, but its ability to absorb effective carriers is a problem related to the specific structure of the solar panel. Products from different companies, and even each part will be different.
The advantages and disadvantages of rooftop solar panels are:
1.Advantages< /p>
1. Solar energy resources can be used efficiently to generate electricity and electricity can be saved. Currently, the state provides certain subsidies for the installation of electricity generation panels. Solar power generation can allow us to use less electricity and save on our families' electricity bills.
2. Installation of solar panelses on the roof is relatively simple, generally speaking, it can be installed by a few workers in half a day.
2. Disadvantages
1. The investment in installing solar panels is relatively large. For some families, installation fees may be considered and will not be accepted.
2. This type of solar power generation panel is installed directly on the roof if exposed to wind and sun for a long time, corrosion problems may occur.
3. After all, solar panels are obtained from solar energy, so they can only be used on sunny days. However, if it is cloudy or the sunshine is not particularly sufficient, power consumption will be affected. .
4. During installation, you need to drill holes in the roof and penetrate the roof. If the installation is not reasonable plLater, the roof will leak.
The principle of solar panels
A solar cell is a device that responds to light and can convert light energy into electricity, producing an effect photovoltaic. many kinds of materials, such as: monocrystalline silicon, polycrystalline silicon, amorphous silicon, gallium arsenide, copper selenium indium, etc. Their principles of energy production are basically the same. Now crystalline silicon is used as an example to describe the photovoltaic power production process. Crystalline P-type silicon is doped with phosphorus to obtain N-type silicon, forming a PN junction.
When light irradiates the surface of the solar cell, part of the photons are absorbed by the silicon material; the energy of the photons is transferred to the silicon atoms, causing the electrons to transition and become electricwe are free. accumulate on both sides of the PN junction to form a potential difference. When an external circuit is connected, under the action of this voltage, a current will flow through the external circuit to produce a certain output power. The reality of this processQuality is the process by which photon energy is converted into electrical energy.