Photovoltaic (PV) cell/modules mathematical modelling is a mandatory aspect in recent renewable energy based systems. Several PV mathematical modelling techniques have been recently presented that vary in complexity and accuracy. In addition, the study of PV modules performance under partial shading conditions adds more complexity due to the presence of multiple local maxima/minima. In this paper, an enhanced PV array model is proposed with extended capabilities like: (i) graphical user interface (GUI) environment, (ii) open source structure, (iii) applicability on cell/array/module configuration, (iv) individual irradiance/temperature input per cell, and (v) accurate determination of local/global maxima/minimums points due to partial shading. The effectiveness of the proposed model is illustrated via rigorous simulation results in addition to a comparison between the proposed model and several recent references that are concerned with partial shading conditions.