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Photovoltaic (PV):
Photovoltaics are a method for generating electric
power by using solar cells to convert energy from the sun (solar
radiation) into a flow of electrons. The photovoltaic effect refers to
photons of light exciting electrons into a higher state of energy,
allowing them to act as charge carriers for an electric current.
Don't be misled and think that we don't have
enough sun in the UK because as long as there is daylight there is solar
radiation which provides the energy for the panels.
Home energy requirement:
An average family home uses in the UK uses between
2,000 and 4,000 kilowatt hours of mains electricity per year. A typical
domestic Solar PV Panel system of between 1.5 kilowatt-peak and 2
kilowatt-peak will provide 30 to 40 per cent of the total electricity
requirement. If the house is already energy efficient then the solar power
percentage will be higher.
Solar PV Installations:
For maximum efficiency PV panels operate when they
are orientated towards the south however they will still produce situated
between any east and west facing location. Shade will significantly
reduce their efficiency and is best to avoid shading however there are
ways within the installation to minimise this effect.
Panels don't just have to be installed on a house
roof. They can be installed on other buildings or free standing as
long as they are close by to a mains electrical supply.
Generally planning consent is usually only
required for the installation of Solar PV Panels on listed buildings or
buildings in conservation areas however it is advisable to discuss the
planning issues with the local authority before having Solar PV Panels
installed.
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