Question 1

What does this calculator estimate?

Accepted Answer

The calculator estimates annual and monthly capacity-related costs for Belgium, Netherlands, and Luxembourg. For Belgium: peak demand (kW) and region. For Luxembourg: reference capacity and annual consumption. For Netherlands: connection class and customer segment. Tariff data comes from published DSO rates-actual invoices may differ.

Question 2

Are the tariff coefficients accurate?

Accepted Answer

Coefficients are sourced from published tariff data (Fluvius, ORES, Sibelga, Resa for Belgium; Creos for Luxembourg; ACM and regional DSOs for Netherlands). Actual rates vary by DSO, tariff year, and contract. Check your DSO's published tariffs or your latest invoice for exact rates.

Question 3

What is a 15-minute peak?

Accepted Answer

Your 15-minute peak is the highest average power (kW) you drew in any single 15-minute interval during the billing period. Digital meters record this automatically. This peak determines your capacity charge for the month.

Question 4

How can I lower my capacity costs?

Accepted Answer

Reduce peak concentration by staggering heavy loads (HVAC, compressors, EV charging) so they don't all run in the same 15-minute window. Read our guide on reducing peak demand charges for practical steps.

Question 5

Where can I get my actual peak data?

Accepted Answer

Your DSO (Fluvius, ORES, Sibelga, or Resa) provides interval data. You can request the 15-minute curve from their portal or customer service. Use it to verify invoice peaks and to plan load staggering.

Capacity Tariff Calculator

Estimated capacity cost

Method disclaimer

FormulaHow the estimate is computed

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