in the composite takes place during the final production of the pre composite for a photovoltaic module 24 which as shown in fig4 can take place for example by a so called roll to roll method in this case for example a composite 20 consisting of the encapsulating material 1 and the sealing layer 5 in conjunction with the solar cell system 6 consisting of flexible solar cell types is rolled up on the storage roll b another composite 20 u2032 consisting of the encapsulating material 1 u2032 and the sealing layer 5 u2032 is withdrawn from the opposite storage roll a and fed to the solar cell system 6 which is withdrawn together with the composite 20 from the storage roll b at the same time the material webs withdrawn from the storage rolls a or b are each fed to a heating station 21 or 21 a in which the encapsulating materials are at least heated to the softening temperature of the sealing layer 5 or 5 u2032 this ensures the formation of a composite between the layers 20 and 20 u2032 on the one hand as well as the solar system 6 and the layers 20 and 20 u2032 on the other hand in order to achieve curing of this pre composite and complete cross linking of the polymers used in the encapsulating materials this is fed to a heating station 23 the pre composite 24 u2032 for a photovoltaic module can be stored on the storage roll c and accordingly withdrawn from this again as required the following exemplary embodiment reproduces possible variants for the selection of the components in the respective layers carrier material 3 3 u2032 polyethylene terephthalate pet polyethylene.