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Photovoltaic installation

Self-consumption can reduce the electricity bill by up to 80%.


In recent years, the installation of solar photovoltaic systems for self-consumption has become popular, leading to more and more small solar photovoltaic systems solutions for self-consumption being installed, simplifying the installation process (you can get more information in our article on self-consumption) and allowing to guarantee a better remuneration of the energy produced.

If the energy produced is not sold to the grid, how do I get better remuneration?

Photovoltaic panels produce electricity, roughly, between 8 am and 5 pm, this also coincides with the periods when the cost of electricity you consume in your home is more expensive. By checking on tariffs the tariff regulated on a bi-hourly basis, you can see that the energy consumed in these periods is paid at 0.19 € / kWh, that is, if you have installed a photovoltaic panel that allows you to reduce the purchase of energy from the grid in these periods, it will be equivalent to selling the energy produced by the system to the electricity grid at the same price.

Consumo de energia

Um T2 com 3 pessoas tem uma fatura de eletricidade média de 60 €/mês.

Kit Autoconsumo 1000W

A aquisição de um kit de autoconsumo de 1000 W representa um investimento de, cerca de, 1200 € e permite reduzir o consumo de energia em casa durante o dia.


A instalação do kit fotovoltaico para autoconsumo, numa fatura anual de 720 €, pode reduzir a sua fatura de energia em 285 €/ano.

Other tips
  1. Seek the support of a professional to help you through the process and ensure that you choose the solution that suits your needs.
  2. Consult more than one supplier. Ask for several quotes and select the one that best responds to your needs and with the best installation conditions.
  3. Confirm that the proposed equipment is certified according to the European Standards in force.
  4. Look for a guarantee for your equipment (10 years in materials and labor, 90% of the minimum rated power for 10 years and 80% of that for 20 years).
  5. Carry out periodic maintenance to solar photovoltaic systems (removing dust and debris from the panels, checking for shading and damage to them, checking the fixing structure and the connections to the inverter and meter).
Case study

A typical family with 3 people living in a T2 has an average annual electricity consumption of 3,000 kWh (2,000 kWh / year in empty and 1,000 kWh / year in empty), which is equivalent to a monthly bill of 60 € ( considering the values ​​of the regulated tariff on a bi-hourly basis with a daily cycle).

The installation of a photovoltaic kit for self-consumption with an installed capacity of 1,000 Wp, occupying an area of ​​7.5 m2 oriented to the south and with a slope close to the local latitude, allows an average annual production of 1,500 kWh / year.

This kit represents an investment of € 1,200 and an annual saving of € 285 in energy, corresponding to a reduction of € 24 in your monthly bill, which represents a payback period of 4 to 5 years.

The energy generated by the system corresponds to the annual energy consumed by domestic equipment, such as:

  • Fridge;
  • Washingmachine
  • Dishwasher

Installing a photovoltaic system will make your home more efficient and could increase your energy class.



For greater savings, you must ensure that the highest consumptions occur during the photovoltaic panel’s energy production period while consuming as much energy as possible.

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