Solar photovoltaic (PV) uses solar energy to generate electricity for appliances and lighting. PV systems use solar cells, made up of one or two layers of semi-conducting material. As light falls on the solar cells, an electric field is created causing electricity to flow. Whilst higher levels of sunlight will result in more electricity being generated, the system does not rely on sunshine to function – daylight is sufficient.
Solar PV requires south-east to south-west orientation. They can be stand alone (i.e. positioned away from the building), and either mounted or integrated on either the roof or the wall. For example, PV tiles can be fitted instead of roof tiles. This section provides more detailed information about solar photovoltaic systems.
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