Abstract The first objective of this paper is to approach and validate the PV module (the current-voltage I–V and the power-voltage P–V curves) using a cubic spline interpolation method; whereas the second one is to identify the more important input parameters with their interactions that impact on the model output (the maximum power) using a global sensitivity analysis. For this purpose, the Latin hypercube sampling is used to obtain a sample set of the uncertain environmental and industrial parameters characterizing the PV module. The obtained results show that the proposed cubic spline model achieves accurate forecasts for this study compared to the power-law model. In addition, the sensitivity analysis and statistical measures have identified the most important parameters within environmental and industrial ones by use of the first and total Sobol indices.
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