NOVELTY - Multilayer film (200) comprises: an insulating layer (230); a back layer (240), where the insulating layer and the back layer include crosslinked polyethene homopolymer or copolymer comprising essentially of (a) polyethylene copolymers comprising more than 99 mole% of repeating units derived from ethene and (b) polyethylene copolymers comprising at least 50 mole% of repeating units derived from ethene and at least one alkene comonomer; and an encapsulant layer (210) including a polyolefin, a silane, at least one crosslinking agent and a plasticizer.    USE - The multilayer film is useful for making a solar module (claimed).    ADVANTAGE - The multilayer film: has a dielectric breakdown voltage of at least 20 kV; has at least one of a reduction of dielectric breakdown voltage of less than 1%, or a reduction in elongation at break and tensile strength of less than 20% after being exposed to steam at 121 degrees C and a pressure of 1 bar for 100 hours (claimed), hence provides long term electrical and mechanical protection against heat and moisture exposure; utilizes the encapsulant layer, which minimizes the incidence of creep, shrinkage, light transmission, yellowing, corrosion and delamination while maintaining or improving film processability and manufacturing; utilizes the polyethene and polypropene, hence it is cost effective; and exhibits smooth surfaces and long-term stability.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a solar module, comprising: at least one solar cell; and the multilayer film;    (2) making the multilayer film, comprising either: co-extruding at least one of the insulating layer, the back layer or the encapsulant layer to form the multilayer film, and crosslinking the co-extrusion; or assembling the insulating layer, the back layer and the encapsulant layers to form the multilayer film using at least one of laminating or adhesion, and crosslinking the multilayer film; and    (3) making the solar module, comprising vacuum laminating the multilayer film to a solar module.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of the integrated multilayer film.    Multilayer film (200)    Encapsulant layer (210)    Top layer (220)    Insulating layer (230)    Back layer (240)