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For experimental and simulated solar cells and modules discretecurrent-voltage data sets are measured. To evaluate the quality of the device,this data needs to be fitted, which is often achieved within the single-diodeequivalent-circuit model. This work offers a numerically robust methodology,which also works for noisy data sets due to its generally formulated initialguess. A Levenberg-Marquardt algorithm is used afterwards to finalize thefitting parameters. The source code and an executable version of themethodology are published underhttps://github.com/Pixel-95/SolarCell_DiodeModel_Fitting on GitHub. This workexplains the underlying methodology and basic functionality of the program.

Numerically Robust Methodology for Fitting Current-Voltage Characteristics of Solar Devices with the Single-Diode Equivalent-Circuit Model