NOVELTY - Electrically interconnecting solar cells in a solar module comprises: (a) providing solar cells; (b) providing an upper preform and a lower preform; (c) positioning the solar cells between the inner surfaces of the upper and lower preforms; and (d) laminating the upper and lower preforms together such that each wire becomes securely connected to another wire and to a solar cell at respective contact areas to electrically interconnect adjacent solar cells.    USE - The method is useful for electrically interconnecting solar cells in solar module (claimed).    ADVANTAGE - The invention obviates the need for conventional soldering in manufacturing solar cell modules.    DETAILED DESCRIPTION - Electrically interconnecting solar cells in a solar module comprises: (a) providing solar cells; (b) providing an upper preform and a lower preform, each comprising a sheet of ionomer encapsulant material having wires to be used for interconnecting the solar cells, the wires being bonded to an inner surface of each preform; (c) positioning the solar cells between the inner surfaces of the upper and lower preforms such that each wire on a preform includes a portion proximal to a contact area on one of the solar cells and another portion proximal to a contact area of a wire on the other preform; and (d) laminating the upper and lower preforms together such that each wire becomes securely connected to another wire and to a solar cell at respective contact areas to electrically interconnect adjacent solar cells; or electrically interconnecting solar cells in solar module, comprises: (a) providing back-contacted solar cells: (b) providing an upper preform and a lower preform, each comprising a sheet of ionomer encapsulant material, where the lower preform includes wires to be used for interconnecting the solar cells, the wires being bonded to an inner surface of the lower preform; (c) positioning the solar cells between the upper and lower preforms such that each wire on the lower preform includes a portion proximal to a contact area on a back surface of one of the solar cells and another portion proximal to a contact area on a back surface of an adjacent solar cell; and (d) laminating the upper and lower preforms together such that each wire becomes securely connected to a solar cell and an adjacent solar cell at respective contact areas to electrically interconnect the solar cells.