NOVELTY - In connection with a photovoltaic module (1) comprises a photovoltaic cell (4) having a front surface on which solar light is incident and a back surface, a front glass plate (2) on the front surface, a backsheet or back glass plate (6) on the back surface, and a silicone composition for encapsulating the photovoltaic cell comprises 100 pts. wt. of an organopolysiloxane containing at least two silicon-bonded alkenyl groups per molecule; an organohydrogenpolysiloxane containing at least two silicon-bonded hydrogen atoms per molecule; and an addition reaction catalyst.    USE - As silicone composition for encapsulating the photovoltaic cell in connection with a photovoltaic module (claimed).    ADVANTAGE - The composition, when cured, has a modulus of elasticity of 0.1-5 MPa. The silicone composition for photovoltaic encapsulation withstands an outdoor weathering environment over a long term. The photovoltaic module encapsulated with the composition remains highly reliable.    DETAILED DESCRIPTION - In connection with a photovoltaic module (1) comprises a photovoltaic cell (4) having a front surface on which solar light is incident and a back surface, a front glass plate (2) on the front surface, a backsheet or back glass plate (6) on the back surface, and a silicone composition for encapsulating the photovoltaic cell comprises 100 pts. wt. of an organopolysiloxane containing at least two silicon-bonded alkenyl groups per molecule of formula R'aR'bSiO(4-a-b)/2 (I); an organohydrogenpolysiloxane containing at least two silicon-bonded hydrogen atoms per molecule, in such an amount that a molar ratio of silicon-bonded hydrogen to silicon-bonded alkenyl is 0.4/1 to 2.5/1; and a catalytic amount of an addition reaction catalyst, the silicone composition, when cured, having a water vapor permeability of at least 80 g/m2.day at 40 degrees C and a thickness of 1 mm.    R'a=alkenyl;    R'b=optionally substituted 1-10C monovalent hydrocarbon free of aliphatic unsaturation;    a=0-2;    b=0-3;or    a+b=0-3.    An INDEPENDENT CLAIM is included for photovoltaic module comprising a photovoltaic cell having a front surface on which solar light is incident and a back surface, a front glass plate on the front surface, a backsheet or back glass plate on the back surface, and an encapsulant for encapsulating the cell, where the encapsulant is the silicone composition.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-sectional view of the photovoltaic module.    Photovoltaic module (1)    Front glass plate (2)    Silicone encapsulant layer (3)    Photovoltaic cell (4)    Backsheet or back glass plate (6)