Photovoltaics

What is self-consumption of photovoltaic energy?
Self-consumption is the consumption by one or more consumers of electrical energy from a solar panel production system.

Is collective self-consumption possible?
Yes, collective self-consumption has been regulated, so that several consumers can be associated to the same generation plant, which will promote self-consumption in homeowners' communities. This possibility has been facilitated by the production facilities close to the consumption facilities and associated to them.

What legislation is applicable to photovoltaic self-consumption?
The applicable legislation is Royal Decree 244/2019 regulating the administrative, technical and economic conditions for self-consumption.

What is an off grid installation?
It is considered an isolated installation "the one in which there is no physical capacity for electrical connection to the transmission or distribution grid either directly or indirectly through its own or another's installation at any time. Installations disconnected from the grid by means of switching devices or equivalent shall not be considered isolated for the purposes of the application of this Royal Decree.”

Is the installation of panels profitable?
Yes, especially in regular homes. As long as you have energy demands that involve monthly electricity expenses of around 60 €, we will be facing a positive scenario where an installation can save up to 70% on our bill. In addition, we must take into account that there are aids, subsidies and bonuses such as:

• Personal income tax deductions for making energy efficiency improvements in the home.
• IBI reductions, in some cases up to 50%.
• Subsidies for self-consumption facilities.

What is surplus compensation?

Surplus is the electrical energy produced by the photovoltaic installation and not self-consumed.

Can surplus energy be sold?

Energy surpluses are not sold, they are traded. In each invoice, the payment of the surplus cannot exceed the amount of the term of the energy consumed from the network. This essentialy means that we will be able to return energy to the grid, and our supplier will be obliged to buy them from us, but we will only be able to reduce our bill up to €0.

Does the installation require maintenance?
A photovoltaic installation is not an installation that requires a lot of maintenance, but it is always convenient to carry out an annual revision of the inverter, as well as of the solar panels, where we will check that the operation is correct and we will carry out a general cleaning.

Do solar panels lose performance?
Solar panels have two types of warranty:

• Performance Warranty: The panels we install guarantee at least 90% of production after 10 years and 80% after 25 years.
• Product Warranty: Inverter and panels are guaranteed for 5 to 10 years.