What is a solar panel? Features of solar panel

Solar panel (Solar panel) is composed of one or more solar cells to become solar panels. Solar cell is a kind of semiconductor device with the characteristic of converting light into electricity. It can convert solar radiation energy irradiated on its surface into direct current. Solar cell panel is the most basic component in photovoltaic power generation system/product, and it is also solar photovoltaic The core part of the power generation system. Its biggest function is to convert solar energy into electric energy and store it in the storage battery.
Characteristics of solar panels

When the 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 free electrons that gather on both sides of the PN junction to form a potential difference. When the circuit is connected externally At this time, under the action of this voltage, there will be a current flowing through the external circuit to produce a certain output power.

The essence of this process is: the process of converting photon energy into electrical energy. The service life of solar panels is determined by the materials of the cells, tempered glass, EVA, TPT, etc. Generally, the service life of solar panels made by manufacturers who use better materials can reach 25 years, but with the impact of the environment, solar cells The material of the board will age with time.

Under normal circumstances, the power will attenuate by 30% after 20 years, and the power will attenuate by 70% after 25 years. A solar cell is a device that responds to light and can convert light energy into electricity. There are many kinds of materials that can produce photovoltaic effect, such as: single crystal silicon, polycrystalline silicon, amorphous silicon, gallium arsenide, indium copper selenium and so on. Their power generation principles are basically the same, and now take crystalline silicon as an example to describe the process of photovoltaic power generation. P-type crystalline silicon can be doped with phosphorus to obtain N-type silicon, forming a P-N junction.

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