PV Array IV Curves: Why We See Them The Way We Do?

This paper presents the principles behind the formation of current vs. voltage (IV) curves of a solar photovoltaic (PV) array. More than that, the inherent relationship existing between the strings of the PV array and rows of its IV curve is revealed. Explaining why IV curves always subscribe to a `staircase' shape forms the dominant part of this paper. The findings going to help the PV instructors and teachers explain the IV curves in a better way, and PV analysts now can visualize them better than before. More importantly, findings are presented using graphical illustrations and plots. Hence, laborers, beginners and people with no mathematical background would understand the same way the people already working in the PV.