A single-diode model is the most important and broadly used tool for PV module design and analysis. The model has 5 parameters to be identified from the I-V characteristics curves. However, due to the lack of explicit form of I or V with the unknown 5 parameters, parameter identification is very difficult. Recent progress in PV model identification are discussed in this paper with the simulation of MATLAB against the measured data from a real PV module. An improved Oblique Asymptote Method is

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... en proposed and compared with existing identification methods. Test results show that the proposed method achieves lower RMSE with less knowledge of I-V data points. Index Terms -single-diode model, parameter identification, oblique asymptote method.