Flanders Annual Rolling - Full year simulation showing 12-month rolling average for Flemish billing
Analysis: What Does This Simulation Prove?
What this proves: Flanders calculates your annual capacity fee based on the average of your monthly
peaks over 12 months. A single bad month (high peak) affects your bill for an entire year. This simulation runs for 13 months
to show how peaks from month 1 eventually roll off the average. The first month has intentionally high peaks (8 kW from EV charging),
while subsequent months have lower peaks (3.5 kW). Watch how the rolling average starts high but gradually decreases as the
high-peak month ages out. After 12 months, the original high peak drops from the average, demonstrating the rolling nature
of Flemish billing.
Current Month Peak
3.9 kW
Highest 15-min interval
Est. Annual Cost*
€194
Capacity tariff portion
Est. Monthly Cost*
€16
Per month average
Why No Savings? This simulation has no battery configured. The capaciteitstarief node outputs a
current limit signal, but without a battery to discharge, there's nothing to cover the difference when
consumption exceeds the limit. The grid must supply all power, so peaks cannot be reduced.
What This Shows: The system correctly tracks your highest 15-minute peak during the month.
Your current peak of 3.9 kW
results in an estimated annual capacity fee of €194.
To Actually Reduce Peaks: You need a battery that can discharge during high-consumption moments.
For example, reducing an 11 kW EV charging peak to 5 kW could save approximately
€300/year on your capacity tariff.
| Current Month Peak |
Date/Time |
Power (kW) |
| Highest Peak |
2025-01-01 17:00 |
8.00 |
*Estimated using Flemish capacity tariff rate of ~€50/kW/year. Actual rates vary by provider.