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What is the best roof to install solar panels?

Self-consumption is becoming a reality in Spain, as it is one of the European countries with the most hours of sunshine per year.

What is the best roof to install solar panels?

For this reason, many people wonder what type of roof is the most suitable for installing solar panels.

What should you take into account to install solar panels on your roof?

There are many doubts about which is the perfect roof to place solar panels, since depending on its characteristics it can generate more or less  solar energy .

Next, we explain the keys to understanding whether or not it is feasible to install solar panels on your roof.

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1. Orientation

Now we will talk about which is the best orientation for your solar panels .

The houses that receive more irradiation are those that are  oriented towards the south  (azimuthal angle 180º), as well as to the southeast and southwest.

If this possibility does not exist, the  solar panels  can be oriented  towards the east or west , although production can decrease by 20% compared to a house facing south.

Another type of terrain that allows a better position, such as the  garden or the roof , can also be used, but it should never face north.

To find out more precisely the orientation of your home, you can search for your property on  Google Maps  and use the compass to find out if it is facing south.

2. State 

It is important  to assess the state of the roof before carrying out the solar installation , in case it is necessary to make any repairs.

It should be noted that solar panels have a useful life of up to 25 years, but they do not have to damage the roof if their installation is carried out correctly.

3. Shadow

Shade affects the performance of the photovoltaic installation , either totally or partially, for example because of a tree or a chimney that covers part of the house.

In order to obtain the maximum from solar radiation, it is essential to have the advice of a professional and experienced company that can anticipate this type of problem and provide the best solution.

4. Angle

The best types of roofs have a 30 to 40 degree pitch . And it is that if the angle is less than 12 degrees it will be difficult to clean them naturally and remove remains of leaves or dust.

In Spain, the most common inclination is between 20 and 35 degrees, a positive characteristic that favors the performance of photovoltaic panels.

5. Size

The more space you have on your roof, the more options you will have to install your solar panels, since  for each kW you need about 10  square meters of space.

6. Material 

Photovoltaic panels can be installed on any surface, but there are materials that are more recommended than others, so it is important to know them if you are going to build your home and you have in mind to use this renewable energy.

The covers must be stable, rigid and flat to hold the solar panels correctly, which is why  metal or slate  are the most recommended.

And if you don’t have a roof, where can you put the solar panels?

If you do not have a roof for solar panels or this is not the most suitable, there are other possibilities to make your home more sustainable.

You can place solar panels on facades, on the ground, on elevated structures, etc. In addition, if you live in a  community of neighbors , you can also take advantage of a reduction in your electricity bill by agreeing to an installation on the roof, as stated in  article 17.1 of Royal Decree 244/2019 , of April 5.

How many solar panels do you need in your home?

The number of solar panels that a house or apartment building needs can vary in each case, but the most common is to install between 4 and 18 modules.


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