NOVELTY - A photovoltaic solar panel backsheet (100) comprises: an exterior layer (110) having inner and outer surfaces; a middle layer (120) having inner and outer surfaces; and an interior layer (130) having inner and outer surfaces, where the outer surface of the middle layer may be adjoined to the inner surface of the exterior layer, and the inner surface of the middle layer may be adjoined to the outer surface of the interior layer. The exterior layer comprises a polyamide and ionomer alloy. The middle layer comprises a polyamide. The interior layer comprises a polyamide and ionomer alloy.    USE - As photovoltaic solar panel backsheet in photovoltaic solar panel module (claimed).    ADVANTAGE - The backsheet improves upon the efficiency, strength, weather resistance, cost, and useful life of the solar panels in which the backsheet is incorporated. The backsheet provides electrical insulation for safety, and prevents performance problems such as current leakage or potential short circuits. The backsheet provides efficient, durable, weather resistant, and cost effective backsheet used in the construction of solar panel systems. The solar panel backsheet eliminates the use of adhesives in the backsheet construction. The backsheet can be prepared by efficient and cost effective method.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a method for manufacturing photovoltaic solar panel backsheet, involving the steps of: drying an exterior layer material comprising a polyamide and ionomer alloy, a middle layer material comprising a talc filled polyamide, and an interior layer material comprising a polyamide and ionomer alloy; heating the exterior, middle and interior layer materials to a state where each of the materials may be extruded into individual sheets or webs; extruding the exterior, middle and interior layer materials into individual sheets or webs; forming the backsheet comprising a single, three layered sheet or web which comprises the exterior layer material sheet or web having inner and outer surfaces, where the middle layer material sheet or web has inner and outer surfaces and the interior layer sheet or web has inner and outer surfaces, where the outer surface of the middle layer sheet or web is adjoined to the inner surface of the exterior layer sheet or web, and the inner surface of the middle layer is adjoined to the outer surface of the interior layer sheet or web; and    (2) a photovoltaic solar panel module comprising: a front cover (410) having inner and outer surfaces; at least one photovoltaic cell (430) encapsulated in an encapsulant (420) having a top outer surface and a bottom outer surface; backsheet comprising: an exterior layer having inner and outer surfaces; a middle layer having inner and outer surfaces; and an interior layer having inner and outer surfaces, where the outer surface of the middle layer may be adjoined to the inner surface of the exterior layer, and the inner surface of the middle layer may be adjoined to the outer surface of the interior layer; and the top outer surface of the encapsulant is adjoined to the inner surface of the front cover, and the bottom outer surface of the encapsulant is adjoined to the inner surface of the interior layer of the backsheet. The top portion of the encapsulant comprises a material composition which permits light to pass through the top portion of the encapsulant to activate the at least one photovoltaic cell, and the bottom portion of the encapsulant comprises a material composition which reflects at least partially reflects light to increase the at least one photovoltaic cell operating efficiency.    DESCRIPTION OF DRAWING(S) - The figure shows cross-sectional schematic view depicting a solar cell construction incorporating solar panel backsheet.    Backsheet (100)    Exterior layer (110)    Middle layer (120)    Interior layer (130)    Solar cell (400)    Front cover (410)    Encapsulant (420)    PV cells (430)    Encapsulant portion (440)