In this study of leaf area measurement with PV cells, two 7∗10 cm2 and 5∗7 cm2 amorphous silicon solar modules which were composed of 6 series connected cells were used. Photovoltaic cells are semiconductor devices that transformlight coming from the sun into direct current (DC) electricity. When photons of solar energy hits the surface of a solar cell, the stimulated electrons are broken loose fromthe atoms in the semiconductor material, resulting in a flow of photocurrent (