The design of solar panels and the materials used make it possible for solar panels to work in relatively extreme temperatures as well. Generally, solar panels can work in temperatures ranging from -40°C to 80°C, but it is possible that the power generation efficiency of solar panels will be significantly reduced in temperatures of -40°C or 80°C. The optimal temperature for solar panels is at 25℃, when the power generation efficiency of solar panels can be maximized.
The temperature correction factor is the percentage of power lost by the solar panel for every degree Celsius rise or fall in the solar panel tested at 25°C. The temperature correction factor is the percentage of power lost by the solar panel for every degree Celsius rise or fall. Different types of solar panels have different temperature correction factors, generally ranging from -0.2% to -0.5%. It can be used to adjust for changes in the efficiency of the solar panel due to temperature changes and can roughly calculate the power generated by the solar panel.
Effect of low temperature: Solar panels in low temperature environment may lead to load abnormality, this is because the current of solar panels will change due to temperature changes, affecting the output power of solar panels. In low temperature weather, the air may produce condensation, condensation pooled on the solar panels may cause the solar panels to reflect the sunlight away, which fundamentally reduces the power generation efficiency of the solar panels.
High Temperature Impact: At high temperatures, solar panels accelerate aging and the conductivity decreases, thus reducing the output current and voltage. The cells in solar panels are made of silicon, which oxidizes faster at high temperatures, reducing the lifespan of the solar panel. High temperatures may also increase the risk of deformation and cracking of solar panels.
Use cold-resistant, heat-resistant solar panels: cold-resistant, heat-resistant solar panels can reduce the impact of extreme temperatures on solar panels, improve the power generation efficiency of the solar power system.
Install a thermostat: The thermostat instantly monitors the temperature of the solar panels through temperature sensors and controls the cooler to moderately heat the solar panels when the temperature of the solar panels is high. When the temperature of the solar panel is low, the heater is controlled to heat the solar panel. No matter what the temperature, the thermostat can control the solar panel temperature within a reasonable range. However, the thermostat has dual functions, and it will be more expensive.
Clean the solar panels in time: at low temperatures, condensation will form scale on the surface of the solar panels. At high temperatures, there will be bird droppings and other impurities on the solar panels. All of them will affect the power generation efficiency of solar panels. So cleaning the solar panels in time is an important measure.
Use water cooling technology: Water cooling technology uses water as the medium, through the flow of water to take away the heat from the solar panel, to maintain the solar panel’s efficient power generation rate.
Solar panels can work in the temperature range of -40℃ to 80℃, whether the temperature is higher than the working temperature or lower than the working temperature, we have corresponding solutions to solve the problem, so as to improve the power generation efficiency of solar panels.
