Does high temperature lead to a decrease in photovoltaic efficiency?
The operating temperature range for photovoltaic (PV) modules is typically from -40°C to 85°C, with a standard operating temperature of 25°C, at which the module's output power reaches 100%. However, when the operating temperature exceeds 25°C, the output power of the module decreases as the temperature rises.
In summer, with temperatures generally ranging from 30°C to 40°C, the surface temperature of the modules can even reach 50°C to 60°C, significantly impacting the efficiency of energy generation.
Moreover, high temperatures not only affect the output power of PV modules but can also impact other components, such as inverters, accelerating component aging and shortening the lifespan of the equipment.
Although increased solar radiation intensity might lead one to believe that PV energy generation will increase, in reality, the power output of PV modules has a negative temperature coefficient relationship in high-temperature weather. This means that the higher the temperature, the lower the output power. The ideal operating temperature for PV modules is around 25°C. For every 1°C increase in temperature, the output power decreases by approximately 0.35%, leading to a corresponding reduction in the energy generation of PV power plants.
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