Solar panels for hot water and heating they are spreading in residential homes, especially in recent years. On the one hand they allow a considerable saving on electricity and gas energy bills and on the other they support the concept of eco-sustainability, exploiting a natural and renewable energy source such as the sun. Individuals are now aware that with their small contribution they can contribute to the care and protection of the environment.
The most recent buildings, such as condominiums or single-family villas, but also offices and schools, demonstrate how to resort to solar thermal panels for heating more and more often, creating modern and dynamic buildings that boast better energy classes of the past, thanks to the presence of alternative energy systems compared to the classic heating system completely entrusted to the boiler, for example, which guarantee high-performance and eco-sustainable buildings.
Solar panels for hot water and heating are called solar thermal panels or solar collectors. Many European countries are investing massively in thermal solar panels, such as Germany or Austria, although they benefit from lower insolation levels than Italy, which instead has very high insolation levels (on average 1.500 kWh / m2 every year).
Discover all the advantages of solar panels for hot water and heating for your home
Solar thermal panels they are modern and efficient systems used for the production of hot water to be used for the most disparate uses, from industrial ones to domestic ones. They are the fruit of continuous technological evolution, today more attentive than ever to energy saving and respect for the environment. They have many advantages that can be easily listed:
- heat sanitary water without the use of electricity or gas, determining a significant saving on energy bills;
- they do not require the installation of the electric water heater and the gas boiler to obtain hot water for all domestic uses;
- they are highly performing, which means security of the heating system and efficiency in energy performance, which are unrivaled;
- they use and transform solar energy that is clean and inexhaustible, into thermal energy;
- they do not pollute, since their operation is not based on the combustion of substances that, inevitably, would release waste materials to be disposed of, toxic gases and polluting particles in the atmosphere;
- contribute to the reduction of fossil fuel consumption, notoriously sources of exhaustible energy and still in use, such as oil;
- increase the economic value of a home, since they improve the energy performance, which is usually documented through a special certificate called Energy Performance Attestation;
- guarantee the possibility of enjoying government grants, tax breaks and incentives for their installation;
- allow access to subsidized loans for purchase and installation.
The thermodynamic solar
The continuous search for alternative energy sources and the improvement of the systems that still exist today have allowed the development of the traditional ones solar thermal panels for heating radiators, and the creation of even more innovative and efficient systems called thermodynamic solar. It is a technology dedicated to the production of domestic hot water in homes, extremely efficient and efficient.
The thermodynamic solar they adapt perfectly to any surface, which is why they can be easily installed in various environments and conditions such as terraces, gardens, roofs and balconies. Their ease of use is facilitated by their relatively low weight, which does not exceed 8 Kg and therefore does not require supporting masonry work. Thermodynamic solar panels contribute to reducing the costs incurred for the energy of an average family of around 70%, thanks to the possibility of integrating with the primary heating system.
To amplify its performance and increase its efficiency, it is advisable to place it alongside radiant panel heating systems, such as floor or ceiling. The added value that a solar thermodynamic it consists of the ability to heat water in any condition, even when it rains and even during the night. The latter represents a great step forward compared to the limits of the past, which could often discourage potential customers. It is good to separate the thermodynamic at low temperatures, usually used for domestic purposes, from the thermodynamic at high temperatures which is purely intended for industrial uses.
Solar panels agree
Solar thermal for heating is worthwhile, and this is a statement that can easily be confirmed not only in the most recent studies, but above all in the experience of those who make use of the benefits and advantages of this heating system. Although its diffusion is documented in the most modern buildings, it is noted that even the renovations of houses already in use, are concentrating on complete energy restructuring.
The advantages are certainly numerous, first of all the saving related to their use. The bills will be lighter and, without doubt, the houses will be more protected from the winter cold, with hot water always available. Another big boost to the complete energy restructuring the financial law approved by the Italian Government, otherwise called the Budget Law, which it has provided, has given it over the past two years incentives and tax breaks for those who make their homes more energy efficient.
Complete energy restructuring
This expression indicates one of the interventions that can be included in the broader category of the energy requalification, which includes the necessary interventions for improve energy performance of an existing house. These interventions allow the home to obtain a better energy class. The energy redevelopment includes 3 types of interventions that affect energy efficiency and are:
- thermal insulation that protects the home from temperature exchange with the outside, consequently using less energy;
- optimizing the heating system, providing for possible weak points such as the absence of regulation systems or replacing an old boiler with a condensation boiler;
- energy production through various systems, such as photovoltaic panels, solar thermal systems.
What to do when doing an energy renovation
When proceeding with one complete energy restructuring, by installing a solar thermal, the first thing to do is to contact professionals in the sector. It will be necessary to ask for the advice of an engineer or architect regularly enrolled in the register, or of a company in the sector that has its own professionals. For save as much as possible, it is advisable to get more than a quote, to compare them and choose with absolute serenity the best solution, in relation to the best quality-price ratio.
Today they are a valid alternative to the classic methods i online quotes, quick, cheap, they allow you not to move from home. It should be kept in mind that design is essential, we will need to calculate energy needs, taking into account the size of the house and the needs related to the number of members of the family unit. Precise calculations will allow us to understand the necessary surface to be installed, to obtain an efficient and performing system.
For example, a professional will know if it is appropriate to install natural circulation systems compared to those a forced circulation. It is correct to say that the solar thermal heating is convenient, however it is more complicated to translate this saving into exact economic terms, since much depends on family habits, on the frequency with which household appliances such as washing machines or dishwashers are used, or how many showers are made. Approximately it can be said that the saving is between the 120-200 annual cubic meters of methane per person, with a reduction of carbon dioxide of 220-420 kg per person per year.
So not only saving but also less environmental impact. To what has been said above, the costs that irremediably weigh on the weight of consumption but that consumption are not, first of all VAT, must be added. The great efficiency of the solar thermal for heating water is recorded above all in the period from April to October, when they are able to satisfy more than 90% of the total hot water needs of the house, completely forgetting the boiler and water heater, reducing the waste that they also produce.
Solar thermal panels prices
The market of thermal solar panels is in continuous and rapid growth, thanks to a series of elements among which savings that generate on electricity and gas bills, greater sensitivity towards i global energy problems and a major respect for the environment, which makes it increasingly lean towards clean alternative energy systems and therefore sustainable. This rapid rise is contributing greatly to cutting prices, making this technology affordable. But let's see the prices.
Taking into account all the variables referred to in the previous paragraph, it can be stated that for a family of 2 / 3 people living in Turin, a cost of around € 1.300,00 including VAT is sufficient, for a complete kit including n.1 panel solar, a fiberglass container from 150 lt, the antifreeze liquid to be poured into the circuit, and an iron support for assembly, for the sole production of hot water.
If you also want to add the heating system, then the expense goes up but not by much. In general, for small systems with the same installed surface, the recommended choice also from an economic point of view could fall on a natural circulation system, with flat glazed panels, whose cost per square meter, including all the components could be around the 400 / 1.000,00 €.
Facilities and incentives
The Italian State gives the opportunity to benefit from special tax breaks, in the case of building renovations that include the improvement of energy performance. Is called Ecobonus the mechanism that in these cases grants the 75% tax relief on the expenses incurred within 31 December 2017, both on its own home and on the common parts of a condominium.
In the case of the installation of solar panels not only for the production of hot water for domestic or industrial uses, but also for the coverage of hot water needs in sports facilities such as swimming pools, or shelters and care homes, schools and universities, the maximum value of the deduction is equal to € 60.000,00. In the case of improvement of the energy performance the maximum deduction is € 40.000,00.
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