Solar self-consumption in Portugal: the complete 2026 guide
Hybrid Solar team · 18 June 2026 · 1 min read
What a UPAC (a self-consumption production unit) is, how selling surplus works and what has changed in Portuguese legislation this year.
What self-consumption is
Self-consumption means producing electricity where it is consumed. In Portugal, an installation of this kind is called a UPAC — short for the Portuguese term for a self-consumption production unit — and it can serve a home, a business or even an energy community.
Every kWh produced and consumed at home is a kWh you no longer buy from the grid. That is why instantaneous self-consumption is always more valuable than selling surplus.
Registration and legal requirements
Systems of up to 30 kW only require prior registration with the DGEG, the Portuguese energy authority — a simple process that the installer handles on the customer's behalf. Above that, a production licence is required.
Registration is essential in order to sell surplus and to keep your home insurance valid in the event of a claim related to the installation.
How much you really save
In a home with moderate daytime consumption, a 5 kWp system typically cuts the annual bill by between 50% and 70%. With a battery, it is possible to go beyond 85%.
The payback period is currently between 4 and 7 years, depending on the consumption profile, the orientation of the roof and the district.
