Do you have a bi-hourly meter and are wondering about its impact on your photovoltaic system?
In the case of an installation linked to a meter that runs back wards (in the Walloon region for installations of -10kVA), two situations may arise:
Your installation produces less than your annual consumption on your day meter. In this case, there's no point in changing your two-hour meter. The balance on your Jour meter will be positive at the end of the year, meaning that you will have benefited from 100% of the green electricity you produced. What's more, you'll still benefit from a reduced rate for the Night phase of your meter.
Your installation produces more than your annual consumption on your day meter. In this case, the balance on your day meter will be negative at the end of the year, earning you nothing. What's more, your Night meter will always count your consumption positively, with no transfer between the two meters. It's in your interest to install a single-hour meter..
In the case of a meter that does not run in reverse (in the Brussels and Flemish regions for -10kVA installations and in the Brussels, Walloon and Flemish regions for +10kVA installations) :
Your meter is working properly. That is, it will turn positive if you consume electricity from the grid (when your panels produce less than you consume). But it will never turn negative when you inject electricity into the grid. This electricity will be sold to your energy supplier at a lower price than the electricity purchase price. So it's in your interest to keep a two-hour meter to benefit from the reduced rates of the Night meter. Since your panels don't produce when the sun is down, you'll be using electricity from the grid in any case.
SIBELGA, the Brussels electricity grid operator, is now mandatorily installing the new digital meters in the Brussels region.
