NOVELTY - A blend composition (C1) consists essentially of an ethylene copolymer 1 (10-90 wt.%) and an ethylene copolymer 2 (10-90 wt.%), based on the total weight of the blend composition; and optionally at least one additive selected from processing aids, flow enhancing additives, lubricants, pigments, dyes, optical brighteners, flame retardants, impact modifiers, nucleating agents, antiblocking agents, thermal stabilizers, hindered amine light stabilizers, UV absorbers, UV stabilizers, dispersants, surfactants, chelating agents, coupling agents, adhesives, primers, and reinforcement additives.    USE - As a cross-linkable encapsulant layer in form of sheet, preferably multilayered extruded, for solar cell module or solar control module (claimed).    ADVANTAGE - The blend compositions are made into sheets at an extrusion temperature as high as 135 degrees C without undergoing a significant degree of cross-linking. The relatively low initial viscosity of the blend compositions allow the encapsulant material to fully flow around the solar cell assembly during lamination and therefore minimize cell breakage. The incorporation of the olefin as a co-monomer in the ethylene copolymers 1 and 2 reduces the blend compositions crystallinity and thus improves the clarity of the encapsulant layer.    DETAILED DESCRIPTION - A blend composition (C1) consists essentially of an ethylene copolymer 1 (10-90 wt.%) and an ethylene copolymer 2 (10-90 wt.%), based on the total weight of the blend composition; and optionally at least one additive selected from processing aids, flow enhancing additives, lubricants, pigments, dyes, optical brighteners, flame retardants, impact modifiers, nucleating agents, antiblocking agents, thermal stabilizers, hindered amine light stabilizers, UV absorbers, UV stabilizers, dispersants, surfactants, chelating agents, coupling agents, adhesives, primers, and reinforcement additives; where the ethylene copolymer 1 consists essentially of copolymerized units of ethylene, optionally copolymerized units of a first olefin (10-40 wt.%) of formula CH2=C(R1)CO2R2, and copolymerized units of a second olefin (2-30 wt.%) of formula CH2=C(R3)COOH, where the weight percentages of the copolymerized units of the first olefin and of the second olefin are based on the total weight of the ethylene copolymer 1; and where the Ethylene Copolymer 2 consists essentially of copolymerized units of ethylene, optionally copolymerized units of the first olefin (20-40 wt.%), and copolymerized units of a third olefin (3-15 wt.%) of formula CH2=C(R4)-D', where the weight percentages of the copolymerized units of the first olefin and of the third olefin are based on the total weight of the Ethylene Copolymer 2.    R1=H or alkyl;    R2=alkyl;    R3=H or alkyl;    R4=H or alkyl;    D'=moiety selected from -CO2R5, -CO2R6-R5, -R6-R5, -O-R5, or -R5;    R5=moiety containing epoxy group;    R6=alkylene.    Provided that none of the first, second or third olefins is a dicarboxylic acid or a di-ester, mono-ester or anhydride of the dicarboxylic acid. INDEPENDENT CLAIMS are included for the following:    (1) a product of cross-linking the composition (C1), where at least a portion of the carboxylic acid groups of Ethylene Copolymer 1 are reacted with at least a portion of the epoxy groups of Ethylene Copolymer 2 to form cross-links between Ethylene Copolymer 1 and Ethylene Copolymer 2;    (2) making (M1) a sheet consisting essentially of the composition (C1), involving: a) combining the Ethylene Copolymer 1 and the Ethylene Copolymer 2 in a melt at a temperature of less than 135 degrees C; and b) forming a sheet from the melt;    (3) a solar cell module comprising a solar cell assembly and at least one encapsulant layer, where the encapsulant layer consists essentially of the composition (C1) or a product of cross-linking the composition (C1);    (4) preparing (M2) a solar cell module, involving: (i) providing a solar cell assembly and at least one encapsulant layer, where the encapsulant layer consists essentially of the composition (C1), where the composition (C1) is uncross-linked, and where the encapsulant layer is formed by extrusion from the melt at a temperature of less than 135 degrees C; and (ii) laminating the assembly at a lamination temperature of greater than 135 degrees C to provide a solar cell module, where the composition (C1) is cross-linked;    (5) a solar control module that is the product of the process (M2); and    (6) making (M3) the composition (C1), involving: a) providing ethylene copolymer 1 and ethylene copolymer 2; and b) combining Ethylene Copolymer 1 and Ethylene copolymer 2 in a melt at a temperature of less than 135 degrees C.