Description
Calculate a supplied demand-charge term above a billed floor.
Energy prices and charges depend on energy units, demand units, standing-charge days, tariff periods and settlement sign conventions. Purchased-energy losses differ from delivered-energy fractions, and signed prices can produce negative monetary terms. Nominal battery cost allocations are supplied scenarios rather than physical aging forecasts.
Calculate a supplied demand-charge term above a billed floor.
When to use this tool
Use Demand Charge Peak Interval Cost when you already have measuredPeakKilowatts, billedDemandFloorKilowatts, ratePerKilowatt and need to calculate a supplied demand-charge term above a billed floor.
How to use the tool and how it works
- Enter measuredPeakKilowatts, billedDemandFloorKilowatts, ratePerKilowatt. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read billedKilowatts, demandCharge. Use the output convention below.
Require nonnegative peak kW, billed-floor kW and currency/kW rate; billed=max(peak,floor), charge=billed*rate.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| measuredPeakKilowatts | Measured Peak Kilowatts | Required. Finite number; minimum 0. |
| billedDemandFloorKilowatts | Billed Demand Floor Kilowatts | Required. Finite number; minimum 0. |
| ratePerKilowatt | Currency/kW demand rate, not currency/kWh energy rate. | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| billedKilowatts | Billed Kilowatts | Required. Finite number. |
| demandCharge | Demand Charge | Required. Finite number. |
{
"input": {
"measuredPeakKilowatts": 80,
"billedDemandFloorKilowatts": 100,
"ratePerKilowatt": 5
},
"output": {
"billedKilowatts": 100,
"demandCharge": 500
}
}Limitations and assumptions
- The tool does not derive the measured peak, enforce an interval definition, apply a ratchet or calculate an energy charge in kWh.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Reconcile the actual meter series, tariff, contract and billing definitions for an account or market question. Use a complete cash-flow or physical-energy model when needed; a single block overlap, index ratio or supplied settlement term cannot establish actual charges or performance.
References
Similar or alternative tools
- Tariff Standing Charge Day Count
Calculate a supplied daily standing-charge total.
- Tariff Block Marginal Charge
Calculate added usage falling inside one supplied tariff block.