NOVELTY - Backsheet (I) comprises a coextruded multilayer sheet comprising: (i) an inner layer comprising polyolefin resin; (ii) a core layer comprising polypropylene resin, a blend of polypropylene resin and maleic anhydride grafted polypropylene (MAH-g-PP), or polypropylene resin/MAH-g-PP multilayer structure; (iii) an outer layer comprising maleic anhydride grafted polyvinylidene fluoride (MAH-g-PVDF), a blend of PVDF and MAH-g-PVDF, or PVDF/MAH-g-PVDF multilayer structure; (iv) a first tie layer between the core and outer layers; and (v) an optional second tie layer between core and inner layers.    USE - The backsheet is useful in a rigid photovoltaic cell panel (claimed).    ADVANTAGE - The backsheet: exhibits good adhesion to encapsulant and good electrical insulation properties; and can be obtained in single step coextrusion process in a cost effective manner. The third or outer layer of the backsheet provides weatherability, environmental and water vapor protection.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a rigid photovoltaic cell panel, comprising a photovoltaic cell and the backsheet;    (2) a backsheet (II) comprising a coextruded multilayer sheet, comprising: a first layer comprising a blend of PVDF and MAH-g-PVDF, MAH-g-PVDF, or a two-layer structure comprising a layer of PVDF and a layer of MAH-g-PVDF; a second layer comprising a polypropylene resin, a blend of a polypropylene resin and a maleic anhydride grafted polypropylene MAH-g-PP, or a two-layer structure comprising a layer of polypropylene resin and a layer of MAH-g-PP; and a first tie layer interposed between, and in contact with, the first and second layers, where, when the first layer comprises a two-layer structure, then the layer of MAH-g-PVDF is in contact with the first tie layer, and when the second layer comprises a two-layer structure, then the layer of MAH-g-PP is in contact with the first tie layer; and    (3) making the backing sheet, comprising coextruding a multilayer film having (i)-(v) as above per se.