Description
outputUnitCost = inputEnergyPrice/roundtripEfficiency+outputOtherCost.
Energy price comparisons require consistent delivered or input energy units, efficiency, calorific basis and reporting period. Dividing by efficiency increases the input needed for a delivered unit; nominal price differences alone need not represent a saving.
outputUnitCost = inputEnergyPrice/roundtripEfficiency+outputOtherCost.
When to use this tool
Use Storage Roundtrip Cost Term when checking one supplied energy-price normalization or cost contribution.
How to use the tool and how it works
- Enter inputEnergyPrice, roundtripEfficiency, outputOtherCost. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read outputUnitCost. Use the output convention below.
Require roundtripEfficiency in (0,1]. outputUnitCost = inputEnergyPrice/roundtripEfficiency+outputOtherCost. Both terms must use the same currency per delivered-energy unit after the efficiency adjustment.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| inputEnergyPrice | Input Energy Price | Required. Finite number. |
| roundtripEfficiency | Roundtrip Efficiency | Required. Finite number; maximum 1; strictly above 0. |
| outputOtherCost | Additional currency per delivered-energy unit, added after the input-price efficiency adjustment. | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| outputUnitCost | Output Unit Cost | Required. Finite number. |
{
"input": {
"inputEnergyPrice": 40,
"roundtripEfficiency": 0.8,
"outputOtherCost": 5
},
"output": {
"outputUnitCost": 55
}
}Limitations and assumptions
- Signed prices are accepted. This constant unit-cost term omits capacity costs, degradation, timing and operating constraints unless included in supplied costs.
- 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
Use the full tariff, operating profile and cost boundary when assessing real bills, investments or load-shifting decisions.
References
Similar or alternative tools
- Storage Degradation Cost One Cycle Term
costPerCycle = (replacementCost-residualValue)/lifetimeCycles; costPerMwh divides that by dischargedMwhPerCycle.
- Dispatch Cost Adder Component
chargedEnergy = energy/(1-lossFraction) when grossUpLosses is true, otherwise energy; costAdder = chargedEnergy*suppliedAdderPerEnergy.