The nominal operating temperature of a solar panel typically falls within a range of 25 to 35 degrees Celsius (77 to 95 degrees Fahrenheit). This range is considered the ideal temperature range for solar panels to operate at their highest efficiency.

However, it’s important to note that solar panels can still function outside of this temperature range, and modern panels are designed to tolerate a variety of temperatures. Solar panels will continue to generate electricity even when the ambient temperature is higher or lower than the nominal operating range. The efficiency reduction due to temperature effects is usually factored into the panel’s overall performance ratings.

We manufacturers often provide a temperature coefficient specification for their panels, which indicates the percentage decrease in efficiency for every degree Celsius increase in temperature above the reference temperature (usually 25°C or 77°F). This coefficient gives an idea of how the panel’s efficiency might change in different temperature conditions.

For example, a temperature coefficient of -0.4% per degree Celsius means that if the temperature rises by 1 degree Celsius above the reference temperature, the panel’s efficiency would decrease by 0.4%.

In regions with extreme temperature variations, it’s common for solar panel installations to be designed with appropriate ventilation, mounting systems, and sometimes even cooling mechanisms to manage temperature and optimize efficiency.