Abstract
Evaluation and validation of photovoltaics performance models for different technologies and climate regions is of high interest for photovoltaic (PV) systems deployment. There are many tools for modelling the performance of PV arrays; some of them are free or open source. This work presents the results of modelling five different rooftop PV arrays in the range of 1 kW using the Sandia Array Performance Model during one complete year in Madrid. The evaluation of the Sandia model has shown a rather good performance in general, even though several empirical parameters in the input were unknown and were taken from other similar modules in the Sandia database. Particularly, high accuracy has been found in modelling the p-Si array with −0.07% of relative error in the annual energy output. Larger errors were found in the case of a-Si and m-Si (back contact) arrays.
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