This paper presents a novel approach to extract accurately the photovoltaic (PV) module single-diode model five parameters I ph , I sat , A, R s , and R p . The parameters extraction method incorporated a new equation dP/dI=0 at the maximum power point replacing the typically used equation in the literature dI/dV=-1/R p . The new equation avoids the dependence on the value of R p , and it also does not require any complex calculation and tedious combination of other equations to extract the five parameters for a PV module. The PV module behavior at different temperature and irradiance is also forecasted.

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Most of the photovoltaic (PV) system models in the literature have extra internal parameters that are not provided by the manufacturers, viz., R s , R p , A, I o , I sat . Such parameters are not given in the PV module datasheet and require numerical methods to be found due to the nonlinear nature of the PV output characteristic. This paper presents an improved and comprehensive PV model characterization method relying only on the values provided by the manufacturer. A new improvement and modification to some of the existing models under standard test condition (STC) and under varying environmental conditions are proposed. The paper serves as a complete guide for PV system designers and researchers to predict PV system performance over a wide range of temperatures and solar irradiance. Simulation and experimental results are provided to demonstrate the validity of the proposed simplified modeling approach, with an array design example for a power smart building. Index Terms-Single-diode model, Photovoltaic modeling, Standard Test Condition (STC), maximum power point (MPP).

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