Reduced-form of the photovoltaic five-parameter model for efficient computation of parameters

This brief note presents a reduced-form of the five-parameter model introduced by Desoto et al. (2006) and subsequently generalized by Tian et al. (2012). The five-parameter model computes five reference parameters utilized to synthesize performance curves in photovoltaic panels from information available in datasheets. The improvement resulting from the reduced-form is twofold: (i) the model is reduced from five to two parameters and (ii) as a result of (i) a domain of attraction of the solution space is defined analytically, which guarantees nonlinear solvers will provide the correct, that is, physically feasible, solution for the parameters at first launch.