The P1-port on your digital meter

What is the P1 port?

The P1 port is a plug connection on the digital meter that can be connected to an energy consumption manager, such as FlexiO. This allows energy consumption to be read quickly and accurately. More info on the website of Fluvius

https://partner.fluvius.be/nl/technische-documenten/gebruikerspoort-specificaties/p1-poort

Connection to the P1 port is required if you want FlexiO to participate in Grid Balancing.