A simple method for photovoltaic energy estimation

The aim of this work is to provide the simplest way for estimate the energy production of a photovoltaic (PV) system anywhere on the earth. Irradiance, yearly irradiation, PV module temperature, yearly electricity production are computed quantities which lie on the basis of the final form of the method, namely a graph. The results are compared with those generated by available and trusted online software resources, like PVGIS and RETScreen.