Cooling PV modules with radiative sky cooling French scientists have proposed the use of radiative sky cooling as a passive cooling technique to cut PV module temperatures by 10 C. They claim the method could improve performance by more than 5 W/m2.Scientists have studied radiative sky cooling (RSC) at the research level as a potential passive cooling technique for buildings and solar modules. RSC occurs when the surface of an object absorbs less radiation from its environment and less than the energy it radiates. When this happens, the surface loses heat to the outer space and a cooling effect can be achieved without the need for power. ...