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Photovoltaic System 2021. How Does It Work? Is It Worth It?

by Robert Robert - 21 Sep 2021, Tuesday 206 Views Like (0)
Photovoltaic System 2021. How Does It Work? Is It Worth It?

What is photovoltaics, what is the cost Best Solar Panel Company in Pakistan and what are the advantages? In this article you will find everything you need to get a complete picture. A photovoltaic system is an electrical system designed to generate renewable energy from sunlight. A very important system for environmental protection. The main components are photovoltaic panels, inverters and storage systems. Let's go into more detail and start with how it works. We will then see the costs of each component and finally what is worthwhile.

How a photovoltaic system works

The sun is a star that produces extraordinary amounts of inexhaustible energy. The radiated photons are intercepted by semiconductors, usually in silicon, which are often the basis of photovoltaic cells. In this way, free electrons are stimulated generating direct current (DC)voltage and current. The direct current is carried to the  inverter  by specially sized solar cables . This converter is a device designed to transform direct energy into alternating (AC). The latter can therefore be exploited for:

  • Make household appliances or electrical equipment work immediately;
  • Recharge the batteries  to use the energy in the most opportune moments;
  • Sending energy  to the grid to obtain economic feedback.
  • What is the difference with a solar thermal system?

Different from Solar Thermal

You must not confuse the photovoltaic solar system with  solar thermal . The photovoltaic system uses the  light  solar energy to  produce energy , while the solar thermal exploits the  heat  from solar radiation to  produce hot water. Solar thermal systems are usually equipped with an insulated water storage to retain heat. This component is important for getting hot water when you need it most. Also for photovoltaics an accumulation has been foreseen, but of course it has a completely different technology and is useful for accumulating electricity. Let's go back to photovoltaics: what are the various components and how much does each cost?

Cost of photovoltaic system: the expense items

Understanding how the overall price Photovoltaic Modules in Pakistan of a photovoltaic system is formed can be important above all in these respects:

  • Verify that in any offer there is really everything you need;
  • Compare the cost with the benefits and answer the question: is it convenient for me?
  • If you like, you can immediately take a look at the cost of turnkey photovoltaic systems applied in the Italian market. 

Why are many more and more interested in photovoltaics? The cost of electricity is always very high and affects the budget of households and businesses. A smart solution is to install a photovoltaic generator that produces free energy. Are you thinking about it too?

  • Superbonus simulator 110%
  • The cost of photovoltaic solar panels

The cost of photovoltaic panels is closely linked to the origin, quality and brand that distributes them. Especially at the cost of the raw material: silicon. Let's consider the origin of the modules. As you can imagine, companies that manufacture in China or in eastern countries can usually offer lower prices. As well as for many other devices. Not everything that comes from these countries is of poor quality. You have to really check the quality of the materials. Despite this, many do not trust, perhaps because they have already had bad experiences.

What have some European producers done? To cut costs, they decided to leave the assembly part in Europe, but the rest of the production in the East. In this way the costs are slightly higher than what purely oriental companies propose. However, it can Finally, there are companies that decide to leave a large part of the production process in the EU, and for this reason the panels can cost more.

What are the main types on the market?

Solar panels made with silicon: monocrystalline, polycrystalline and thin-film. Often the classic distinction is made between panels made with monocrystalline silicon and those in polycrystalline . Panels made with monocrystalline silicon cells are more expensive, but can have a better yield. In the past, thin-film technology was also used . The advantages it gave were several, including:

  • Lower prices;
  • Better reaction to higher temperatures (therefore in particular in summer);
  • The ability to better capture diffused light. So on cloudy days they worked better.

The biggest drawback? They took up much more surface area to have to produce the same energy than conventional mono and polycrystalline panels. It is true that the cost of the panels was lower, but other installation costs increased. Also now, with the developments of the latest technologies, the benefits of thin film are no longer exclusive. With the new monocrystalline photovoltaic cells, even better results are achieved even on unproductive days.

High efficiency photovoltaic panels

 High efficiency photovoltaic panels can constitute a photovoltaic system with a higher yield and cost With the evolution of technology, an even more important distinction is dictated by the efficiency of the photovoltaic module. What are we referring to? By now there are panels that with measures similar to the standard (1.65 x 1 mt) reach powers of 400 watts and more. It is normal for the price to be higher, but you can benefit from some exclusive benefits:

They often produce more throughout the year;

  • The products of some brands, such as  SunPower , Sharp ,  Panasonic , can last longer, even up to 40 years;
  • They take up less space for the same kW (kWp) installed;
  • In the future, in the event of an upgrade, you may have more surface available to place other modules.
  • Would you like to know the average cost of photovoltaic panels supplied to installers? Below is an indicative table.

Remember that the price of the panels Solar Energy in Pakistan does not correspond to the finished price of a turnkey photovoltaic system. All the components, all the connected services and the manpower that can make it work are missing.