HOW PHOTOVOLTAIC SOLAR ENERGY WORKS
Photovoltaic solar energy is obtained by direct conversion of light into electricity.
During daylight period photovoltaic panels convert light into electrical energy in direct-current. This energy must be converted to alternating-current by a device called electrical inverter which feeds the house electrical distribution switchboard.
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As power consumption during day-time is reduced, the surplus flows to the network grid and registered as a credit in the power meter. During the night, solar panels do not generate any energy, and consumption increases with the operation of lighting and electrical appliances, but the amount of energy produced during the day and registered on the power meter is taken into account in the final balance and results in a cheaper electricity bill.
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This savings compensates system installation costs over a period of time ranging around 6-12 years (depending on solar radiation resources at installation site and energy prices). As system is built for a time-life of 25 years, it provides a profitable financial result.
