NOVELTY - The heat transfer assembly (1) has clamping elements (5) for fixing heat transfer device (4) on photovoltaic module (2). The heat transfer device is provided with frame and support mounted on a tube. A heat transfer medium made of graphite material is made to contact the tube, and is applied to the support. The tube is completely surrounded by the heat transfer medium. The heat transfer medium is provided with a heat transfer layer with surface which is formed as contact surface (9) of the heat transfer device for heat transfer contact with the associated photovoltaic module.    USE - Heat transfer assembly for photovoltaic module of photovoltaic module assembly (claimed).    ADVANTAGE - Since the surface of the heat transfer layer of heat transfer medium is formed as contact surface of the heat transfer device for heat transfer contact with the associated photovoltaic module, the heat transfer assembly is built easily. The support of the heat transfer assembly is made of rigid foam material, thus the weight of the heat transfer assembly is reduced. The performance of the heat transfer assembly is improved. The heat transfer device is easily retrofitted into the photovoltaic module using clamping elements, thus large effort is avoided. The heat transfer assembly is installed easily. Since the heat in the photovoltaic module is transferred quickly and efficiently through heat transfer assembly, the photovoltaic module is cooled effectively. Hence, the loss of power of photovoltaic module is avoided and the performance of the photovoltaic module is improved even in winter. The rear terminals of the heat transfer device are upgraded to multi-functional energy source, thus effective renewable energy is obtained by the photovoltaic module.    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of the photovoltaic module assembly.    Heat transfer assembly (1)    Photovoltaic module (2)    Heat transfer device (4)    Clamping element (5)    Contact surface of heat transfer device (9)