Photovoltaics and its advanteges

Photovoltaics is the conversion of solar energy into electrical energy, which takes place due to the photovoltaic effect. This occurs in the silicon semiconductor layers of photovoltaic panels, similar in shape to the solar collector. An alternative to monocrystalline or polycrystalline silicon is the so-called Thin-films based on chemical compounds (eg CdTe - Cadmium Telluride or CIS - Copper Indium Diselenide) which are applied in one or more layers to a substrate made principally of plastic. However, they are used minimally in Slovakia.

benefity fotovoltiky

PV infografika

The individual photovoltaic panels are connected to each other in rows, and several rows thus form a photovoltaic generator. Photovoltaic generators can be placed on roofs, building facades, or installed directly on the ground. In principle, we distinguish between two types of generator connections:

Network systems whose part of the electricity production is transferred to the public electricity network often at a pre-agreed purchase price or market price (depending on the applicable legislation). Increasingly, the so-called net-metering, i.e. the credit system of produced and consumed electricity. A kind of superstructure of the network system is a system whose entire production is consumed by the manufacturer, and nothing is transferred to the network.

Island systems are systems directly connected to the appliance (e.g. the whole house). In this case, both the photovoltaic generator and the appliance are galvanically separated from the distribution system. Often, non-real-time electricity is backed up by batteries.

Advantages of photovoltaics

  1. Solar energy is free and available everywhere in the world. In addition, photovoltaics is one of the most environmentally friendly ways of producing electricity (measured by carbon footprint and energy return).
  2. With a proper assessment of the installation site and design recommendations, this is an investment with low risk and a certain return.
  3. Photovoltaics is affordable and currently, without any subsidies, the return on investment in Slovakia is in the range of 6-10 years.
  4. Photovoltaics require minimal maintenance and technological components are highly reliable with a long technical life.
  5. When using photovoltaics, you become a producer of electricity and contribute to the decarbonization of the Slovak energy mix.
  6. The efficient use of photovoltaic energy significantly increases your energy independence and reduces the negative effects of energy crises.

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