Solar panels, or photovoltaic cells (PV), are normally attached to the roof or walls of any building that requires electricity.

The PV cells are constructed with either one of two layers of semiconducting material using silicon. When the sunlight shines on the device it creates an electrical field. The stronger the sun’s rays, the more energy will be produced.

Solar panels come in a variety of shapes and sizes including the standard ‘grey’ cells that are seen on house rooftops. It’s also possible to have transparent cells installed onto greenhouses.

The strength of the solar panel is measured in kilowatt peak (KWp). This would be the amount of electricity generated in full sunshine.