The PV system has already a fundamental role in the energy market. Therefore, this kind of plant still grow in terms of sizing and also the research about new technology is always a very current topic. For these reasons, the study on the photovoltaic system can include different matters starting from the better modelling of one specific physical effects arriving at financial analysis in order to help an investor in their choices. Usually, to address in these choices experts and engineers using a simulation software able to replace the condition of one site and make a comparison with another one in a more accurate way.