What are pv panels?
PV panels are solar panels.
Solar panels are devices that directly or indirectly convert solar radiation into electrical energy through the photoelectric effect or photochemical effect by absorbing sunlight. Its general use has certain limitations.
Compared with ordinary batteries and rechargeable batteries, solar cells are more energy-saving and environmentally friendly green products. Solar power generation There are two ways of solar power generation, one is the light-heat-electric conversion method, and the other is the light-electric direct conversion method.
Crystalline silicon materials (including polycrystalline silicon and monocrystalline silicon) are the most important photovoltaic materials, and the demand for polycrystalline silicon mainly comes from semiconductors and solar cells.
When the light hits the surface of the solar cell, a part of the photons is 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 to accumulate on both sides of the P-N junction to form a potential difference, when the external circuit is turned on , Under the action of this voltage, a current will flow through the external circuit to generate 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 cells, tempered glass, EVA, TPT, etc. Generally, the service life of 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 over time. Under normal circumstances, the power will be attenuated by 30% after 20 years of use, and by 70% after 25 years of use.