Photovoltaic (PV) devices is a kind of semiconductor, which generates electricity directly from sunlight via process that occurs naturally.
Semiconductors are substances that become electrically conductive when they are exposed to light or heat. Solar cells are essentially structured into two layers, where one layer is negatively charged and the other holds a positive charge.
As soon as sunlight strikes the layers, a voltage tension develops between the two layers. This generates direct current within the solar cell. In order to be able to use this current, photovoltaic systems have a power inverter or AC converter. The inverter converts the direct current generated by the cells into alternating current, which can then be used for household purposes or to be fed into the public electricity grid.
Most modern solar cells are made from either crystalline silicon or thin-film materials. Panasonic's HIT® uses advanced technology has been designed to generate more electricity and provide high efficiency and performance.