First of all, a PV module is a device that converts light energy into electrical energy, not energy from heat (it is a photothermal device, such as a solar water heater). There are many factors that affect the amount of electricity generated by PV, the duration of light is one of the most important, the longer the duration of light, the greater the amount of electricity generated; temperature also affects the amount of electricity generated, but it is often inversely proportional.
If we look at the PV module specifications, on the back, in the lower right corner, you will see the term "temperature coefficient of Pmax", the temperature coefficient of the products is -0,34% (most of the modules on the market have a temperature coefficient of -0,38%), this means that when the temperature increases by 1°C above 25°C, the module will lose 0,34% of its power. In other words, a 410W PV module will lose (40-25)*0,34% = 5,1% of its power at a temperature of +40°C. Although the hours of light are long in summer, the high temperature leads to a decrease in efficiency, which can instead lead to a decrease in total electricity production.
Secondly, the continuous high temperature can also trigger the hot spot effect and the PID effect of solar modules, thus reducing the service life of the modules. A good panel has minimized these possibilities by considering the high temperature factor early in the product design. However, how to reduce the impact of high heat is system engineering, you also need a professional and reliable installer to do a reasonable design and construction of your PV system; also in this hot and dry summer, you may need to do some surface cleaning of PV panels to prevent dust, leaves, bird droppings and other shading objects from causing spot effect hot on the PV panels, although most of the time the PV panels can be self-cleaned by rain and snow.
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