HOW DOES SOLAR PHOTOVOLTAICS WORK?
Photovoltaic (PV) systems use cells to convert solar radiation into electricity. The cell consists of layers of a semi-conducting material. When light
shines on the cell it creates an electric field across the layers,
causing electricity to flow.
The greater the intensity of the light, the
greater the flow of electricity. However, a PV system can also generate
electricity on cloudy days; it does not need bright sunlight to
The performance of a solar cell is measured in terms of
efficiency at turning sunlight into electricity. A typical commercial
solar module has an efficiency of 16.5% - in other words, over one-sixth
of the sunlight striking the module is converted into electricity.
Improving solar module efficiencies while holding down the cost per cell
is an important goal of the PV industry.