Photovoltaic (PV)

Photovoltaic (PV) does not require direct sunlight only daylight to generate energy.

Photovoltic systems use cells to convert solar radiation into electricity. The PV cell consists of one or two layers of a semi conducting materials, usually silicon. When light shines on the cell it creates an electrical field across the layers, causing electricity to flow. The greater the intensity of the light the greater the flow of electrically.

Feed-in tariff:

A typical home PV system can produce around 40% of the electricity a household uses in a year. You can sell electricity back to the National Grid. Feed-in tariffs provide a guaranteed rate for each unit of electricity generated and exported. You can store electricity for a cloudy day and if your home isn't connected to the National Grid you can store excess electricity to use when you need it.

PV systems generate no greenhouse gases, saving approximately 325kg of carbon dioxide emissions per year.

You can use PV systems for a building with a roof or wall that faces with 90 degrees of south, as long as no other buildings or large trees overshadow it. If the roof surface is in shadow for part of the day, the output of the system decreases. The size of the system is determined by the amount of electricity required.

Benefits:

• Cut your electricity bills.
• Cut your carbon footprint.

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