NOVELTY - A thermoplastic polyurethane is a reaction product of an isocyanate component (a) comprising aliphatic diisocyanate, isocyanate-reactive component (b) comprising Zerewitinoff-active polyol(s) having average of 1.8-3 Zerewitinoff-active hydrogen atoms, and number average molecular weight of 600-10000 g/mol and Zerewitinoff-active polyol(s) having average of 1.8-3 Zerewitinoff-active hydrogen atoms, and number average molecular weight of 60-500 g/mol, as chain lengthener, and chain terminator (c).    USE - Thermoplastic polyurethane is used for film for solar panel and photovoltaic module (all claimed).    ADVANTAGE - The photovoltaic module is formed efficiently using thermoplastic polyurethane with reduced generation of air bubbles.    DETAILED DESCRIPTION - A thermoplastic polyurethane is a reaction product of an isocyanate component (a) comprising aliphatic diisocyanate, isocyanate-reactive component (b) comprising Zerewitinoff-active polyol(s) having average of 1.8-3 Zerewitinoff-active hydrogen atoms, and number average molecular weight of 600-10000 g/mol and Zerewitinoff-active polyol(s) having average of 1.8-3 Zerewitinoff-active hydrogen atoms, and number average molecular weight of 60-500 g/mol, as chain lengthener, and chain terminator (c). The equivalent ratio of isocyanate groups in component (a) with respect to hydroxyl groups in components (b) and (c) is 0.85-1.2. The chain terminator (c) is introduced simultaneously with components (a) and (b), or separately into a reactive extruder, or in a stream formed by combining components (c) and (b) which stream is simultaneously introduced with component (a) into the reactive extruder within 16 hours of combining components (c) and (b), or as a separate stream, simultaneously with a stream comprising prepolymer formed by reacting component (a) with portion of component (b) and with stream comprising remaining portion of component (b), or in a stream formed by combining component (c) and portion of component (b) which stream is simultaneously introduced with prepolymer stream formed by combining component (a) with portion of component (b), provided streams are combined within 16 hours of combining component (c) with portion of component (b). INDEPENDENT CLAIMS are included for the following:    (1) manufacture of thermoplastic polyurethane;    (2) film, which is formed using thermoplastic polyurethane;    (3) solar panel, which is formed by encapsulating film in solar panel components; and    (4) photovoltaic module, which has outer cover layer(s) which faces energy source comprising glass or impact-resistant, ultraviolet-stable, weathering-stable, transparent plastic with low permeability to water vapor, outer layer(s) which faces away from the energy source comprising glass or weathering-stable plastic with low permeability to water vapor, and transparent bubble-free adhesive(s) comprising thermoplastic polyurethane formed between the outer cover layer and outer layer.