Solar collectors (solars) vs. photovoltaic panels (modules) - what is the difference?

Solar collectors and photovoltaic panels are apparently two similar systems that use solar energy. Many people confuse photovoltaic panels and solar collectors, mainly because of their similar appearance. Both systems can be mounted on roofs and on the ground. What they have in common is the use of solar radiation, and that is where the similarities between the two devices end.

Solar collectors versus photovoltaic panels - what are the differences?

Here are the key differences:

  1. Function:
    • Photovoltaic panels: They convert solar energy directly into electricity by means of the photovoltaic effect.
    • Solar collectors: They absorb solar energy to heat a fluid (e.g. water or a special heat-conducting fluid - e.g. glycol) used primarily to heat domestic water.
  2. Construction:
    • Photovoltaic panels: They consist of multiple photovoltaic cells, usually made of silicon.
    • Solar collectors: They can have different designs, but the most common are flat plate collectors, which have black absorption surfaces, and vacuum collectors, which consist of tubes filled with liquid and placed in a vacuum casing.
  3. Application:
    • Photovoltaic panels: Mainly for the production of electricity, which can be used in homes, businesses or to power the grid.
    • Solar collectors: Mainly for hot water production or to support heating systems in buildings.
  4. Effectiveness:
    • Photovoltaic panels: They typically have lower solar conversion efficiencies (depending on the technology, currently ranging from 20% to 23% for commercial silicon panels).
    • Solar collectors: They have a higher efficiency in converting solar energy into heat, often exceeding 70%.
alt=kolektory słoneczne i panele fotowoltaiczne
Integrated system on the hotel roof - photovoltaic modules and solar collectors

Solar collectors or photovoltaic panels - which to choose?

Although both systems use solar energy, they have different applications and meet different needs. Photovoltaic panels generate electricity, while solar collectors are used to heat domestic water and support the operation of central heating systems.

Photovoltaic panels and solar panels do not compete with each other. It is therefore worth choosing to install both solutions. Both solutions are efficient and can operate all year round. Both photovoltaic panels and solar collectors are economically viable. They are also environmentally friendly and energy-saving devices that ensure a reduction in the costs of everyday life.

In addition, both devices can now benefit from the My Current 5.0 subsidy. A subsidy of up to PLN 7,000 is available for the modules, while up to PLN 3,500 is available for the solar panels.

You can find more information about funding on our website under the tab Funding.

 

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