Photo voltaic array
The Photovoltaic array (PV array) consists of a number of individual photovoltaic modules connected together to give the required power with a suitable current and voltage output. Typical modules have a rated power output of around 75 -120 watts peak (Wp). A typical domestic system of 1.5 - 2 kWp may therefore comprise some 12- 24 modulea covering an area of between 12 -40 m2, depending on the technology used and the orientation of the array with respect to the sun.
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Most PV modules deliver direct sunlight (DC) electricity at 12 volts (V), whereas most common household appliance in the UK run off alternating current (AC) at 230 V. An inverter is used to convert the low voltage DC to higher voltage AC. Numerous type of inverter are available, but not all are suitable for use when feeding power back into the UK main supply. Good suppliers and installers of grid-connect PV systems will be able offer advice on suitability of commonly available models, we offer this service.
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