25 marzo, 2019 0 By admin

Solar panels timer

Do you dream of a lighter energy bill? Do you want to learn more about the world of renewable energy and discover all its advantages? Keep reading this article for more information on solar panels!

¿What are the prices of solar panels?

The price of solar panels depends on several variables, such as the number of inhabitants of the house and the average annual consumption. For this reason, it is always important to consult the experts. Then, however, you will find a table with indicative prices for some solutions.

Number of people in the home. Power necessary to cover the consumption. Number of panels Indicative price including installation. Annual savings in accounts
one 2500 Wp 8 € 6000 € 500
two 3800 Wp fifteen € 9000 € 800
4 6200 Wp 24 € 12,000 € 1200

Ask for quotes to install solar panels.

Over the years, solar panels have become less and less expensive, reaching a stable price recently. For this reason, now is the perfect time to take action and install them. Do you want to compare yourself with specialists in the sector who work in your area to find out the exact price for your situation?


¿Why install solar panels?

Solar panels have found a fertile ground in our country: in 2016, the International Energy Agency (AIE) recognized Italy as the first in the world in the use of solar energy, which covers 8% of its consumption, followed by Greece and Germany.

If you want to equip your house with solar panels, you have chosen the perfect moment! In fact, panel prices have fallen year after year. But how much can its installation cost?

¿What are solar panels?

These are technological devices capable of exploiting  solar energy   for the production of electricity or for heating water. Indicates different types of similar devices but used for different needs:

While the former are used for the production of clean energy, the latter exploit the sun for domestic hot water production.

¿What system should you choose for solar panels?

Now, if your interest converges towards the installation of a  photovoltaic system,  the price depends essentially on the following factors:

  • the type of silicon that makes up the photovoltaic cell: monocrystalline, polycrystalline or amorphous;
  • The size of the plant.

In any case, it must be borne in mind that the choice of the type of panel and the size of the system are two dependent variables: the more efficient the energy of the plant, the smaller the space occupied by the latter.

Other variables of solar panels.

The type of material that makes up the panel is not, in any case, the only aspect that influences the dimensions of the system. They also depend on two other factors:

  • energy consumption;
  • The available surface on the roof.

The energy consumption depends on the size of your home and the number of people who live there. The annual energy consumption of a small house with two people is around 3200 kWh. If you now divide this by 0.85, you will get an estimate of the power needed to meet your needs. For example, if your annual consumption is 3200 kwh, the solar panels should be able to cover a power of 3800 kwh. To achieve this, you will need 15 solar panels of 260 Wp. The price will be around 9000 €.

The photovoltaic system: operation, types and features.

The operation of solar panels.

The photovoltaic system is composed of modules that convert solar energy into direct current. In turn, this is converted into alternating current through an  inverter  .

The types of photovoltaic system.

The  photovoltaic systems  can be:

  • isolated (independent);
  • Connected to the electrical network (connected network).

The independent systems are not connected to the electricity grid, which provides a solution in those cases where connection is not possible, as in mountain shelters.

Network-connected systems are unlikely to cover the energy needs of a family unit, but they can make a significant contribution to lightening invoices. In cases where the energy generated by the plant exceeds the requirement (which occurs more frequently in the case of industrial buildings), it can be introduced into the network.

The efficiency of solar panels.

The efficiency of solar panels depends on:

  • type of modules chosen;
  • quality of the components;
  • Orientation of the panels (optimal orientation to the south).
  • inclination of the panels (the optimum inclination is about 30 °);
  • absence of shading;
  • place of installation (irradiation is higher in southern Italy and less in the north);
  • the weather

The modules

When it comes to modules, the types in the market are the following:

  • monocrystalline;
  • polycrystalline;
  • With amorphous silicon.

Solar panels with monocrystalline silicon are the most expensive and those with the highest yields and are recognized by their black color. Polycrystallines have a simpler and faster production process. For this reason, its cost, as well as its performance, is lower compared to monocrystalline panels. However, on a practical level, the differences between the two variants are not so excessive, especially in the case of domestic installations and the two options are of excellent quality. Polycrystalline panels can have different colors and are usually blue or purple in color.

The figure shows the difference between monocrystalline solar panels (left) and polycrystalline solar panels (right).

Finally, the panels with amorphous silicon are of the type with the lowest performance and the lowest cost: they do not use silicon crystals like the two previous types, but silicon powder. This makes its structure flexible, an aspect that can be useful when installing a system. Due to their lower efficiency, they occupy a larger surface area than poly and monocrystalline systems. They can be effective in case of high temperatures.

The benefits of solar panels.

Becoming part of the world of renewable energies implies innumerable advantages that affect both the family and the environment in which we live. Photovoltaic energy produces clean energy without CO2 emissions and reduces our dependence on the price of alternative raw materials in the market. They also lead to a tangible lightening of bills and allow us to save money that we can then use for other purposes. In addition to this, the value of a house equipped with a photovoltaic system increases and this represents a strength in view of a possible future sale.

Solar panels produce clean energy that can also be used by  heat pumps: the  combination of these two systems helps you get renewable energy in the home and use renewable energy.

Thermal solar panels

There is often confusion between photovoltaic systems and solar collectors, also known as solar thermal panels. Although both exploit the sun, the latter are used for the production of hot water and space heating. Solar thermal panels are mainly of two types:

  • glazed floors;
  • With vacuum tube.

The former have the advantage of being less expensive and are particularly common in Italy. The latter, on the other hand, offer greater performance and, therefore, are a bit more expensive.

Discover the cost of solar panels adapted to your home.