Home Computer Thermal solar panels, how to calculate how many you need

Thermal solar panels, how to calculate how many you need

I increasingly higher costs of the current and, obviously, the increasingly high bills have prompted thousands of consumers to evaluate the installation of solar panels.

The idea of ​​having a life more sustainable and which, at the same time, does save precious money There could be two excellent incentives to take this step but, before proceeding with the implementation of such a project, there are some premises to be made.

Installing a system, in fact, is not as easy as it seems and several things need to be evaluated: such as energy needs for the home on which the panels will be positioned, the geographical area and of course i installation costs.

Parameters that may or may not incentivize the purchase of solar panels and which, of course, are worth examining in detail.

How many solar panels do you need to power a house


A complicated discussion, of course, which must take into account various factors that could increase or decrease the number of solar panels to be purchased (and with it the final amount to be spent).

According to estimates, an average familycomposed of 3/4 people will need at least 15 panels for your home, but of course there are factors that can influence this statistic, such as, for example, the power e the efficiency of the panel (which we will see later) and how much energy it can produce, how much light it receives to the location where ei will be installed family consumptionnaturally.

Generally the energy requirements of a small/medium sized house (which correspond to the classic homes and/or apartments we are all used to) is of approximately 6 kWwhich generally requires 15/16 panels

It is an indicative figure and, although in line with what has been found by expert installers, it may vary based on the factors mentioned above.

Therefore it is advisable before proceeding with the purchase speak to an expert technician who, after having carried out an inspection and made all the necessary findings, will be able to indicate the most suitable solution for your home.

Solar panels, how to choose the most suitable ones


I solar panels are composed of a set of Photovoltaic cells who have the task of produce electricity Thank you to solar radiation.

There are different types of panels on the market and they are all based on silicon cell. To fully understand how this technology works, it is worth exploring the three main categories in detail.

I amorphous silicon panels they are the most cheap but also those more bulky and those with a lower energy efficiency.

Since this material is very flexiblethese panels are the ideal solution for those who need to cover a rather large surface that is not necessarily positioned in a straight line.

Being cheaper, they are also the ideal solution for those who want such a system but without spending exorbitant amounts.

Polycrystalline silicon panels they have a slightly higher yield compared to the other model but, clearly, the cost is also destined to rise.

They can be considered as a sort of “intermediate alternative” which guarantees decent returns and a price that is not too high.

Monocrystalline silicon panels they are those more efficientwhich guarantee a great yield and are, therefore, also ideal for those who have little space available (and would perhaps like a solar panel system to be placed on the balcony of the house).

Of course the construction price of such a system is much higher.

Alongside solar panels, it is also worth considering purchasing one accumulator which has the task, precisely, of storing the excess energy produced by the panel and using it when needed.

It is a real battery that guarantees energy even at night or on days where the sky is overcast.

Clearly these accumulators have a cost which is generally quite high and is around 5000 euros for each battery.

Installation costs


Feed your own home with solar energy can save a lot of moneyhowever it is also true that such a step requires a serious initial investment.

Installing a system that can meet a family’s energy consumption may not be as economical an undertaking as people think and may be prohibitive for many families.

Currently, according to various industry surveys, the average cost for a solar panel system domestic is approx 3-4 euro per watt, figures destined to rise if more valuable panels are chosen. Based on this figure, a 5/6 kilowatt system it would cost come on 20,000 you have 25,000 euros and maybe even something more.

A certainly not negligible amount which could be amortized over time, but which could be difficult to find at the moment.

To this we must also add any costs of the accumulators which, as just said, are definitely not negligible.

Of course solar energy is not just for wealthy people who can afford such sums and there are some government incentives which allow you to “amortize” the expense and obtain benefits and deductions over time.

Just as it is possible reinject the electricity produced into the gridwhich especially in the summer months could yield something, helping to defer the expense of the installation and recover the money invested.

However, things are not as straightforward as they seem and, often, the situation can seem controversial and unclear, like the question above how much energy is paid for sent back to the electricity grid, for example, or the one on the state contributions which, at least for the moment, appear to have been frozen by the Government until further notice.


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