Good sealing performance is critical for PV modules
Release time:
Nov 20,2024
Photovoltaic modules are usually installed in outdoor environments and will be exposed to various weather conditions for a long time. If the sealing performance is poor, rainwater can easily enter the interior of the component. The entry of water can cause damage to the battery cells, for example, the electrodes of the battery cells may be corroded by water. Because the electrodes of battery cells are generally made of metal materials such as silver paste, water and impurities in it will form an electrolyte solution, which will trigger electrochemical corrosion reactions and reduce the conductivity of the battery cells.
Moreover, when water accumulates inside the components, condensation may occur due to temperature changes. If the water droplets formed by condensation adhere to the surface of the solar cell, they will block some of the light, reduce the absorption of sunlight by the solar cell, and thus lower the power generation efficiency of the photovoltaic module.
Good sealing can prevent dust and other particles from entering the components. In some areas with strong sandstorms, if the sealing is not good, dust will gradually accumulate on the surface of the battery cells. Dust can scatter and block sunlight, reducing the effective light intensity reaching the solar cells. Research has shown that when the dust thickness on the surface of photovoltaic modules reaches a certain level, the power generation efficiency may decrease by 10% -30%. Moreover, some chemicals in dust, such as alkaline substances, may corrode component materials in high humidity conditions, further affecting the performance and lifespan of the components.
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