Translations:Mounting system types/4/en

The performance of PV modules is greatly affected by high temperatures. Therefore, properly installing modules to permit ventilation can have a great impact upon system performance. A PV module should not, for example, be placed directly onto a metal roof surface as there will be no ventilation at the back of the module and performance will suffer. In many locations PV modules may experience temperature swings of more than 60°C throughout the year, which means that space also has to be left for modules to expand and contract, otherwise the glass or cells inside of a module could be compressed and damaged. There are no set rules about how much space to allow around modules or between modules, but there are some guidelines: