NOVELTY - Making a solar module comprises: (i) providing a multi-layered backsheet having at least one bonding layer forming the top surface and at least one layer forming the rear surface opposite to the top surface of the backsheet; and (ii) laminating the backsheet with its bonding layer to the carrier of the solar cells of the solar cell layer.    USE - The method is useful for making solar module (claimed) for generating electricity, for example rails or roofs.    ADVANTAGE - One or more optional layers may be introduced into the backsheet to introduce further desirable properties or to enhance the existing properties. One or more scrim or net layers may be present to further increase dimensional stability and handling properties. Scrim or net type layers may also improve the anti dripping performance during burning. Scrim or net layers may be net-shaped or otherwise discontinuous layers of non-woven or woven polymeric material or organic or inorganic fibers. The backsheet having some or all of the properties may be prepared without requiring layers from other polymers than polyolefin-based materials. Thus, the backsheets may be free of one or more or of all of the following polymers or polymer layers: fluoropolymers, polyester, polyamides, polyterepthalates, polyacetates, like polyvinylacetates, or ethylvinylacetates, polycarbonates or polyacrylates and acrylic comonomers.    DETAILED DESCRIPTION - Making a solar module comprising in order of position from the front, i.e. the light-receiving side, to the back: (a) a top part comprising a top layer and a solar cell layer containing at least one encapsulant and solar cells on an aluminum-containing carrier and (b) a bottom part comprising a multi-layer backsheet contacting at least the aluminum containing carrier of the solar cell layer, comprises: (i) providing a multi-layered backsheet having at least one bonding layer forming the top surface and at least one layer forming the rear surface opposite to the top surface of the backsheet and where the bonding layer comprises a polyolefin sheet containing as its major component a cross-linked polymer selected from polyethene homopolymers, polypropene homopolymers, polyethene copolymers comprising repeating units derived from ethene and one or more alpha -olefinic hydrocarbons, polypropene copolymers comprising repeating units derived from propene and one or more alpha -olefinic hydrocarbons and its combinations; and (ii) laminating the backsheet with its bonding layer to the carrier of the solar cells of the solar cell layer. INDEPENDENT CLAIMS are:    (1) an aluminum containing support structure for solar modules comprising the solar module laminated to the support structure by at least a part of the rear surface of the backsheet; and    (2) a solar module comprising in order of position from the front, i.e. the light-receiving side, to the back: (a) a top part comprising a top layer and a solar cell layer containing at least one encapsulant and solar cells on an aluminum-containing carrier and (b) a bottom part comprising a multi-layer backsheet having a bonding layer forming the top surface of the backsheet and contacting at least the aluminum containing carrier of the solar cells of the solar cell layer, and at least one layer forming the rear surface that is opposite to the top surface and is exposed to the outside of the solar module, where the bonding layer comprises a polyolefin sheet containing as its major component a cross-linked polymer selected from polyethene homopolymers, polypropene homopolymers, polyethene copolymers comprising repeating units derived from ethene and one or more alpha -olefinic hydrocarbons, polypropene copolymers comprising repeating units derived from propene and one or more alpha -olefinic hydrocarbons and its combinations.