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FAEPAC - Fundación Axencia Enerxética Provincial da Coruña

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Solar Photovoltaic

 We can transform sun radiation into electric power by using photovoltaic panels. A photovoltaic panel is formed by photovoltaic cells made with two types of silicon (P and N), and put together by a neutral medium. When sunlight falls into these cells it causes certain reactions that cause a movement of electrons that produces electricity. According to the type of silicon of the cells, panels can be divided into single-crystal, polycrystalline and amorphous silicon.

 Not all the received energy is transformed into electricity. In fact, in single-crystal panels only 25% of the received power is transformed into electricity. In polycrystalline it is the 20% and around 12% in amorphous silicon panels.

 The power produced by this system can be stored in batteries or it can be transferred to the electrical network after its transformation. Prices are established by law (at the moment it is 525% of the prize of kilowatt at the moment of the purchase).

 A photovoltaic solar system connected to the electrical network would have the following parts:

  • Capturer: formed by silicon solar panels connected in series or in parallel.

  • Inverter: device that transforms the direct current of the panels into alternating current (the one we use in pour households).

  • Counter: It shows the amount of energy that we sell to the supplier company.

 The isolated photovoltaic energy systems have the following parts:

  • Capturer: formed by silicon solar panels connected in series or in parallel.

  • Batteries: they store the energy produced by the panels.

  • Regulator: It charges the batteries and gets the energy from them as requested.

  • Inverter: As in the system connected to the network, this device transforms the direct current of the panels into alternating current. In case electric consumption is based on direct current this device wouldn’t be needed.

 At an industrial level, there are facilities that generate electricity trough photovoltaic solar panels. They are called solar fields. We don’t have that kind of facilities in our province yet.

 



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© FAEPAC - Fundación Axencia Enerxética Provincial da Coruña
Address: Casa da Enerxía, Rúa Alcalde José Vilaboy Pajón, s/n. 15320 As Pontes - SPAIN
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