NOVELTY - Busbar tape comprises: a conductive metal foil; and a non-conductive thermoset adhesive, where the tape is solderable and capable of adhering to a porous non-solderable aluminum surface.    USE - The bus bar tape is useful for photovoltaic solar cell and solar module, and providing a solderable surface on a photovoltaic solar cell (all claimed).    ADVANTAGE - The busbar tape: provides photovoltaic cell capable of enduring at least 200 cycles, preferably 400 cycles of thermal cycling (-40 degrees C to 90 degrees C) and damp heat (85 degrees C/85% relative humidity) testing for at least 1000 hours, preferably at least 2000 hours with less than 5% increase in resistance of the electrical connection (all claimed); lowers the total cost of solar cell and/or solar module; and maintains function even when subjected to the vacuum and high temperature conditions required for encapsulation of solar cells.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a photovoltaic solar cell (200) comprising the busbar tape, a silicon wafer comprising a front surface and a back surface, a porous non-solderable aluminum surface adjacent to the back surface of the silicon wafer and a busbar tape, where the busbar tape is bonded to the porous non-solderable aluminum surface adjacent to the back surface of the silicon wafer via the non-conductive thermoset adhesive;    (2) a photovoltaic solar module comprising two or more photovoltaic solar cells, where at least some of the photovoltaic solar cells comprise the silicon wafer, the porous non-solderable aluminum surface adjacent to the back surface of the silicon wafer, at least one front-side busbar (210a) and at least one busbar tape, where at least a first photovoltaic solar cell is electrically connected in series to a second photovoltaic solar cell via at least one tabbing ribbon, one end of the at least one tabbing ribbon has been soldered to the at least one front-side busbar of the first photovoltaic solar cell and the other end of the tabbing ribbon has been soldered to the at least one back-side busbar tape of the second photovoltaic solar cell; and    (3) providing a solderable surface on a photovoltaic solar cell, comprising applying the busbar tape to the porous non-solderable aluminum surface of photovoltaic solar cell, and hot pressing the busbar tape and the photovoltaic solar cell, where the photovoltaic solar cell comprises the silicon wafer comprising a front surface and a back surface, and the porous non-solderable aluminum surface is adjacent to the back surface of the silicon wafer and the busbar tape.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the photovoltaic solar cell construction.    Photovoltaic cell (200)    Busbars (210a)    Semiconductor (225)    Conductive aluminum material (235)    Conductive tape (242)