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How many solar panels do I need?

Claudia Pardo

4 min read

ÍNDICE

Do you want to generate your own clean energy and save on your electricity bill? In this article we explain how to calculate how many solar panels you need for your home, depending on its size, consumption habits and roof characteristics.

Installing solar panels is an increasingly popular option for generating clean energy and saving on your electricity bill. However, before making the decision to install solar panels, it is important to know how many are needed to cover the needs of your home.

What factors need to be taken into account when calculating how many solar panels I need?

Before calculating how many solar panels are needed, you may be wondering what permits do I need for the installation of solar panels? The permits required for the installation of solar panels vary depending on the location of the installation and the power of the installation.

In general, the following permits are required:

  • Building permit: this is a municipal permit that authorises the carrying out of works on a property. Solar panel installations are usually considered to be minor works, so the licence is usually a simplified procedure.
  • Grid access and connection permit: this permit is granted by the electricity distribution company to connect the solar panel installation to the electricity grid.
  • Authorisation from the community of owners: if the installation is carried out in a residential building, it is necessary to have the authorisation of the community of owners.

To calculate how many solar panels you need for your home, the following factors must be taken into account:

  • Size: Larger homes tend to need more solar panels. This is because they consume more electricity. In the case of a 200 m² house, the average consumption is considered to be 10,000 kWh per year. For example, a 200 m² house usually needs between 8 and 12 solar panels. This corresponds to an output of between 2.4 and 3.6 kWp.
  • Consumption habits: Houses with high electricity consumption such as those with a swimming pool, electric heating or several electrical appliances tend to need more solar panels than those with low consumption.

For example, a 150 m² house with a swimming pool and electric heating may need between 9 and 12 solar panels.

  • Roof characteristics: the roof should be large enough to accommodate the solar panels, and it should be south-facing and at an appropriate pitch. If the roof does not meet these requirements, you may need more solar panels to compensate for less sun exposure.

How many solar panels do I need for a 200 m² house?

If you are thinking of installing solar panels on your 200 m² house, it is important to know how many panels you need to cover your energy needs. In general, this type of house usually needs between 8 and 12 of them. This equates to an output of between 2.4 and 3.6 kWp.

The number of panels you need will depend on several factors, such as the size of your home, your consumption habits and the characteristics of your roof.

How many solar panels do I need for a 150 m² house?

If you are thinking of installing solar panels on your 150 m² house, it is important to know how many panels you need to cover your energy needs. In general, a 150 m² house usually needs between 6 and 9 solar panels. This equates to an output of between 1.8 and 2.7 kWp.

The number of solar panels you need will depend on several factors, such as the size of your home, your consumption habits and the characteristics of your roof. In the case of a 150 m² house, the average consumption is considered to be 7,500 kWh per year.

What types of solar panels exist?

When deciding which solar panels we need to install, it is advisable to know the types that are on the market. This will surely give you an idea of how much money to invest and which one is the most suitable for your energy consumption.

There are two main types of solar panels:

  • Monocrystalline solar panels: these are the most efficient, but also the most expensive.
  • Polycrystalline solar panels: they are less efficient than monocrystalline panels, but also cheaper.

How do I calculate how many solar panels I need?

To calculate how many solar panels you need for your home, you can use an online solar calculator. These calculators take into account the factors mentioned above to give you a rough estimate of how many solar panels you need.

However, the best way to calculate how many solar panels you need is to request a personalised study from a solar panel installation company. These professionals will be happy to advise you and answer any questions you may have, according to your needs.

This study will take into account all the specific factors of your home to provide you with an accurate estimate of the amount of solar panels you require. Don’t be left in any doubt! It is advisable to be as informed as possible before starting the installation of solar panels.

Table of the number of solar panels required per square metre

Size of house (m2)Number of solar panels
502-3
1004-6
1506-9
2008-12
25010-15
30012-18

Table of the number of solar panels required per yearly consumption

Annual consumption (kWh)Number of solar panels
1.5002 – 4
2.000 – 4.0004 – 6
4.000 – 6.0007- 9
6.000 – 8.00010 – 15
8.000 – 10.00016 – 20

Are you ready to install solar panels?

Solar panels are an excellent option for generating clean energy and saving on your electricity bill. If you are thinking of installing them in your home, don’t hesitate. It is an investment that will save you money and help protect the environment.

In addition, it is important that you follow the advice we have given you to calculate the number of solar panels you need. This way, you can make sure that your installation is right for your needs and that you will be able to enjoy all the benefits of solar energy.

We hope you have found the information useful to find out how many solar panels you need for your home.

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