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solar PV
introduction to PV
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Solar Photovoltaics (PV) - Introduction
The choice of system depends upon the following criteria:
System size
This is generally dictated by one of 3 factors: demand matching, available space, and budget. Where space and budget allow, it is nice to able to match the demand of a property.
System size is given as the kilowatt peak (kWp) value which is the maximum output under ideal conditions. Typically domestic systems range from 1kWp - 5 kWp.
Each 1kWp of installed capacity will produce between 750 - 900 kilowatt hours (kWh or units as they are referred to on your electricity bill) annually and will take up about 8 square metres of space. The average UK household consumes 3,200 kWh annually.
System location
PV systems can be roof mounted, ground mounted or tracker mounted. The choice is often made to meet practical needs, but in the case of the tracker (which follows the arc of the sun) the choice is made to maximise the output.
Roof system type
PV systems are either mounted over the roof on a proprietary frame system or can be integrated into the roof to form part of the watertight roof covering. Roof integrated systems are generally more expensive.
Grid or battery
If a property is grid connected, it is cheaper to connect directly to the National Grid. You can sell any surplus electricity to your electricity supplier, and any deficit can be drawn from them. This approach avoids the need for batteries, which have a limited life and are environmentally unsound. Where there is no grid then batteries are the only option.
Please do not hesitate to call us on 01981 241 399, if you have a specific product or project in mind.
Alternatively, please complete and return the Self-Survey form.
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