Didactics
SOLAR POWER is a clean and renewable source of energy. Producing electricity using solar panels means eliminating the emission of pollutants, such as carbon dioxide, just one of the gases responsible for the greenhouse effect. Each kWh produced using solar panels prevents the emission of between 0,3 and 0,5 kg of carbon dioxide. From the sun the following precious resources can be obtained “free”
- Electricity;
- Heating;
- Hot water.
There are two types of solar power generators: photovoltaic and thermal. The first produces photovoltaic energy using photovoltaic generators that transform sunlight into electricity and can accumulate, store and, when connected to the national grid, transmit the energy produced.
Thermic generators on the other hand produce solar-thermic energy using the heat of the sun to heat water for heating systems or for domestic use.
The photovoltaic solar system allows for the transformation of sun light into electricity through the use of semi-conductors treated with silicon, that when in contact with sun rays are able to release electrons, small negatively charged particles.
The photovoltaic cells that make up the installations are made up of two layers of silicon, one with a positive charge, the other with a negative charge. When the sun rays come into contact with the semi-conductor, a magnetic field is created between the two layers that in turn generates electricity.
Photovoltaic systems do not necessarily need strong sunlight to produce electricity since even on a cloudy day the solar cells function thanks to the refraction of the sun’s rays. Photovoltaic systems are of two different types:
- Systems without accumulation (Grid Connected), connected to the national grid
- Systems with accumulation (Stand Alone), used for isolated locations not connected to the national grid.
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