NOVELTY - A photovoltaic device module has a multiple module encapsulant including one or more discrete layers comprising at least a module layer (A), at least a module layer (B), a bottom module layer and a plurality of solar cells (10) sandwiched between the multiple module encapsulant and the bottom module layer. At least one of the cells has a protective layer (20) that provides a level of moisture resistance equal to or higher than any of the layers above the cells.    USE - For solar roofing material used for flexible solar roofing membrane (both claimed).    ADVANTAGE - The photovoltaic device module provides improved environmental protection, and weather proofing and moisture protection.    DETAILED DESCRIPTION - A photovoltaic device module has a multiple module encapsulant including one or more discrete layers comprising at least a module layer (A), at least a module layer (B), a bottom module layer and a plurality of solar cells (10) sandwiched between the multiple module encapsulant and the bottom module layer. At least one of the cells has a protective layer (20) that provides a level of moisture resistance equal to or higher than any of the layers above the cells. The protective layer is provided above the solar cell and light passes through the multiple module encapsulant and the protective layer to reach the solar cell. The module layers (A,B) comprise a non-glass material. The composition used for module layer (A) consists of an ethylene tetrafluoroethylene or silica-nanoparticle-filled, acrylic hard coat. The composition used from module layer (B) consists of thermoplastic polyurethane or thermosetting ethylene vinyl acetate. The protective layer comprises of a substantially organic material, a substantially inorganic material, a hybrid organic/inorganic nanolaminate, a heat curable hardcoat material, a radiation curable hardcoat material, an ultraviolet curable hardcoat material, a clear non-yellowing silicone-based hardcoat material, a curable polyacrylate hardcoat containing silica particles an acrylic composition containing at least one filler material, at least one multifunctional acrylic material, and at least one higher functional acrylic material. The protective layer further contains at least one material chosen from silica, alumina, aluminosilicates, diamond-like films, borosilicates, silicon nitride, aluminophosphosilicates, and aluminophosphates. The filler material comprises of silica, acrylate functionalized silica, a silicone based material, colloidal silica and a silane chosen from 3-methacryloxypropyltrimethoxysilane, 3-acryloxypropyltrimethoxysilane, 2-methacryloxyethyltrimethoxysilane, 2-acryloxyethyltrimethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-acryloxypropyltriethoxysilane, 2-methacryloxyethyltriethoxysilane, 2-acryloxyethyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 2-glycidoxyethyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, and 2-glycidoxyethyltriethoxysilane. The multifunctional acrylic material is chosen from diacrylates such as 1,6-hexanediol diacrylate, 1,4-butanediol diacrylate, ethylene glycol diacrylate, diethylene glycol diacrylate, tetraethylene glycol diacrylate, tripropylene glycol diacrylate, neopentyl glycol diacrylate, 1,4-butanediol dimethacrylate, poly(butanediol) diacrylate, tetraethylene glycol dimethacrylate, 1,3-butylene glycol diacrylate, triethylene glycol diacrylate, triisopropylene glycol diacrylate, polyethylene glycol diacrylate, and bisphenol, dimethacrylate, triacrylates such as trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, pentaerythritol monohydroxy triacrylate, and trimethylolpropane triethoxy triacrylate, tetraacrylates, such as pentaerythritol tetraacrylate and di-trimethylolpropane tetraacrylate, and pentaacrylates such as dipentaerythritol and (monohydroxy) pentaacrylate, preferably, triacrylates such as trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, pentaerythritol monohydroxy triacrylate, and trimethylolpropane triethoxy triacrylate, tetraacrylates such as pentaerythritol tetraacrylate and di-trimethylolpropane tetraacrylate, and pentaacrylates such as dipentaerythritol, and (monohydroxy) pentaacrylate. The module further contains an initiator, a photoinitiator, an anaerobic gelation inhibitor and a diluent. The photoinitiator is chosen from 2-hydroxy-2- methyl-1-phenyl-propan-1-one, and 2,2-dimethoxy-2-phenyl-acetyl-phenone. The anaerobic gelation inhibitor is chosen from 2,2,6,6-tetramethylpiperidinyloxy, 4-hydroxy-2,2,6,6-tetramethylpiperidinyloxy, bis(4-hydroxy)-2,2,6,6-tetramethylpiperidinyloxy sebacate diradical, 2,2-diphenyl-1-picrylhydrazyl, 1,3,5-triphenylverdazyl, 1-nitroso-2-naphthol, a nitrone, methylhydroquinone, galvinoxyl, 4-hydroxy-2,2,6,6-tetramethylpiperidinyloxy, N-t-butyl-.alpha.-phenyl nitrone, and 2,2-diphenyl-1-picryl-hydrazyl hydrate. The diluent is chosen from isopropanol, t-butanol, n-propanol, n-butanol, methanol, ethanol, ethylene glycol n-butyl ether, and their mixtures. The protective layer has a composition comprising silicon, carbon, oxygen and hydrogen.    DESCRIPTION OF DRAWING(S) - The figure shows cross sectional view of the solar cell with a protective layer.    Solar cell (10)    Protective layer (20)    Barrier layer (40)    Support layer (50)    Sealing material (54)