Description
Apply a supplied price-index ratio to an opening tariff.
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.
Apply a supplied price-index ratio to an opening tariff.
When to use this tool
Use Tariff Inflation Index Step when you already have openingTariff, previousIndex, currentIndex and need to apply a supplied price-index ratio to an opening tariff.
How to use the tool and how it works
- Enter openingTariff, previousIndex, currentIndex. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read indexedTariff, change. Use the output convention below.
Require previousIndex and currentIndex positive/finite; indexedTariff=openingTariff*(currentIndex/previousIndex), change=indexed-opening.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| openingTariff | Opening Tariff | Required. Finite number. |
| previousIndex | Previous Index | Required. Finite number; strictly above 0. |
| currentIndex | Current Index | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| indexedTariff | openingTariff*(currentIndex/previousIndex); index bases must be comparable. | Required. Finite number. |
| change | Change | Required. Finite number. |
{
"input": {
"openingTariff": 50,
"previousIndex": 100,
"currentIndex": 110
},
"output": {
"indexedTariff": 55.00000000000001,
"change": 5.000000000000007
}
}Limitations and assumptions
- Opening tariff may be signed. Indices must be comparable; no contractual lag, cap, rounding or actual tariff adjustment is selected.
- 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.
- Pension Benefit Indexation Period
Apply a supplied indexation rate to an opening pension benefit.