I-V Curves and Diodes Demystified

I-V curves are the basic graphical representation of the electrical characteristics of PV cells, modules and strings, and they have a lot to tell; PV cells themselves are essentially diodes combined with a photocurrent source; and bypass diodes are fundamental components in silicon PV modules. In this presentation we will discuss I-V curves, how they aggregate, and what different curve shapes indicate, including proper operation – and failures of – bypass diodes. Become a better solar professional by learning how to “think like a PV module” through an understanding of I-V curves and diodes.