Numerical approach for Extraction of photovoltaic generator single-diode model parameters

Abdelaaziz Benahmida, Noureddine Maouhoub, Hassan Sahsah


In this work, a numerical approach has been proposed to estimate the five single-diode circuit model physical parameters of photovoltaic generators from their experimental current-voltage characteristics.  Linear least square method has been used to solve the system of three linear equations to express the shunt resistance, the saturation current and the photocurrent as a function of the series resistance and the ideality factor. Two key points have been used to solve the system of two nonlinear equations to extract values of series resistance and ideality factor. The advantage of the proposed method with respect of existing numerical techniques is that use only two key points of the experimental characteristic and need only two initial guesses and does not use any approximation.  To evaluate the proposed method, three PV generators data have been used to compare the experimental and the theoretical curves. The application of the proposed method provides a good agreement with the experimental.


I-V Characteristics; Least square method; Module irradiance; Module temperature; Single diode model



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This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

ISSN: 2722-323X, e-ISSN: 2722-3221

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Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.