Photovoltaic cells are comprised of a semiconductor material, most commonly silicon. Adding common doping agents like phosphorous and boron, create conductivity within the cell and activate the movement of electrons. Doping each side of the crystal lattice in dissimilar elements attracts “free floating” electrons to one side, creating voltage potential.
Sunlight on photovoltaic modules produces direct current (DC) electricity, which is converted to alternating current (AC) by a device called an inverter, which is then wired into your main service module where it feeds your internal power grid.