Self-consumption in passive houses and its benefits

Autoconsumo Passivhaus

Self-consumption in passive houses and its benefits

Today, we live immersed in a constantly changing society, increasingly aware of the care of nature, due to this, mechanisms are sought to try to reduce the use of non-renewable energies.

This series of changes encompasses all vital aspects, including housing, both the way it is built, and the way in which the necessary supplies for its normal operation are obtained.

Next, we will comment on some of the advantages obtained thanks to solar self-consumption applied to a passive house, whose main characteristic is a lower energy demand compared to a traditional home.


What are passive houses and what benefits do they offer?

This concept encompasses those homes built with the aim of maintaining ideal environmental conditions internally, while reducing energy demand by 70-90%.

The conditions that must be presented are:

-Effective thermal insulation, which prevents the transfer of temperature from the outside.

-Absence of thermal bridges, thus avoiding temperature leaks.

-Minimum air filtration inside the house, eliminating those entrances that are not necessary.

-Aerothermal energy and heating that help to recover internal heat.

-Windows and doors of the highest quality, which facilitate a stable internal temperature.

-Use and exploitation of sunlight, as well as the heat emitted by people and household appliances.

-Temperature control thanks to software.


Advantages of opting for self-consumption at home

More and more people are choosing renewable energies over the years, this change is due to various reasons, although the most common are generally two:

-A growing awareness of the environment and its care, the need to evolve towards a sustainable society, based on renewable energy, trying to eliminate the carbon footprint and reducing social energy demand.

-Obtain savings on household bills. Especially in recent months, where we have seen that the price of energy has suffered a large increase.


This is why self-consumption is becoming a solution for users when they seek to reduce their bills.

The easiest way for a home to get the necessary energy is through electrical self-consumption.

Which is defined as obtaining electricity for own consumption in a renewable way, to achieve this, the installation of solar panels in the home is chosen.



Photovoltaic self-consumption

 In solar self-consumption, the sun's radiation is used to generate electricity, thanks to the use of photovoltaic panels, which, in addition to producing enough energy for the house in question, can produce surplus energy already transformed, which can be discharged on the general distribution network.


These systems are composed of:

 Solar panels, as light collectors, accumulators that store the transformed energy, regulators that prevent voltage surges and inverters that transform it into electric current suitable for use.

The systems are connected to the general network, so that, when this installation is in operation, generating energy, it is consumed directly and at times when the installation is not working, the energy will be supplied by the general network.

In addition to the fact that, in recent years, what is known as self-consumption with surpluses has been applied, where the energy that is produced in the installation and is not consumed is transferred to the network, obtaining some compensation for it on the bill.


Is there a real saving when installing solar panels?

 With the installation of solar panels, we can save around 50-70% of the bill, for this, we must calculate, as precisely as possible, the number of solar panels that will be necessary in each case. The most important aspects to take into account are:


-The geographical location where the installation will be located and its respective size.

-The amount of energy that will be demanded by each house.

-In the case of staying connected to the network, which is not always necessary, pay attention to the contracted rate; you must compare between the different companies, both the price of the energy consumed, and the price of the energy that is generated by installation.


It is true that the installation involves a high initial investment, but the fact of opting for self-consumption will mean savings from the outset that will facilitate the amortization of the installation.

In addition to the fact that measures are currently being promoted that facilitate implementation by saving up to 50% of installation costs, these benefits are provided by the autonomous communities, through their request.