NOVELTY - The photovoltaic module (100) comprises a flexible sealing sheet (104), interconnected photovoltaic cells (102) forming a topographically uneven or even surface facing the sealing sheet, and a composite encapsulant filling voids between the sealing sheet and the surface. The composite encapsulant comprises a bulk encapsulant and an UV-resistant filler (50 wt.%) distributed uniformly throughout the composite encapsulant, and forms a layer having an average thickness of 16-40 mils. The filler does not alter the optical transmission of the bulk encapsulant.    USE - Used as a photovoltaic module.    ADVANTAGE - The photovoltaic module exhibits improved wettability, reliability and adhesion properties using surface-treated bulk encapsulant, which has desired temperature stability, UV stability and mechanical integrity, prevents moisture from getting inside its components, and does not alter the optical properties of initial bulk encapsulants.    DETAILED DESCRIPTION - The photovoltaic module (100) comprises a flexible sealing sheet (104), interconnected photovoltaic cells (102) forming a topographically uneven or even surface facing the sealing sheet, and a composite encapsulant filling voids between the sealing sheet and the surface. The composite encapsulant comprises a bulk encapsulant and an UV-resistant filler (50 wt.%) distributed uniformly throughout the composite encapsulant, and forms a layer having an average thickness of 16-40 mils. The filler does not alter the optical transmission of the bulk encapsulant, and an inorganic material, glass fibers, glass beads, fumed silica, precipitated silica, sol-gel silica and randomly oriented fibers. The refractive index of the filler is 1.5-1.7. A difference between the refractive index of the filler and the refractive index of the bulk encapsulant is less than 0.25. The photovoltaic cells are copper indium gallium selenide cells. The bulk encapsulant comprises a silicone-based amorphous thermoplastic material. The sealing sheet comprises a glass panel. A second sealing sheet (106) is faced at an opposite side of the interconnected photovoltaic cells. A second composite encapsulant is disposed between the second sealing sheet and the opposite side, and comprises a bulk encapsulant and a filler distributed uniformly throughout the second composite encapsulant. An average thickness of a layer formed by the composite encapsulant is greater than an average thickness of a layer formed by the second composite encapsulant. An INDEPENDENT CLAIM is included for a method of fabricating a photovoltaic module.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a photovoltaic module.    Photovoltaic module (100)    Interconnected photovoltaic cells (102)    Front sealing sheet (104)    Back sealing sheet (106)    Edge seal (108)    Encapsulant layers. (110a, 110b)