RATIOXA ENERGY · Decision tool
Energy cost calculator
Project consumption, unit price, base fee and annual price change.
5 inputsQuick comparisonSaved locally on this device.
DECISION PACK
Energy cost calculator
Created: 18/08/2026 · energy-cost@5.0
Important: Actual yield and consumption may differ from the assumptions.
Result · Why?
Close result — only €15,828 apart
This is a projection using your tariff, not a live price forecast.
Difference€15,828
First-year cost
Result robustness
Robust within tested range
The leading option remains ahead across the automatic ±10% input tests.
- PeriodApprox. change in result: €1,921
- Unit priceApprox. change in result: €1,421
- Annual consumptionApprox. change in result: €1,421
RATIOXA STORY
Your Decision Story
- 1
Cost over period: €17,436
- 2
First-year cost: €1,608
- 3
Both options leads in the base case.
Calculation Health
Quick estimate
Add more of your own values to strengthen the scenario.
- + Annual consumption
- + Unit price
- + Annual base fee
RATIOXA IMPACT MAP
What matters most?
Period€1,921
Unit price€1,421
Annual consumption€1,421
Annual base fee€162
Annual price change€144
Higher impact →Key insight
Your decision is most vulnerable to changes in Period.
This is a projection using your tariff, not a live price forecast.
SCENARIO RANGE · DETERMINISTIC
Stress-test this decision
Compare everything
Cost over periodFirst-year cost
Result value€17,436€1,608
Difference——
Average per month€145€1,608
Final year€1,887—
RATIOXA FLOW
Next useful steps
SCENARIO RANGE
Conservative · Base · Optimistic
Locked assumptions
TRUST CHECK
Fair Comparison Check
- ✓Same comparison horizon
- ✓Comparable cash flows
- ✓Residual values and balances included
- ✓Inputs are internally consistent
Not included in the model
- Contract terms, eligibility and taxes outside the entered values
- Personal risk tolerance and liquidity needs
- Professional legal, tax, finance or energy advice
Assumption freshness
Decision readiness
0/5 inputs replaced with your own or transferred values · 4 real-world details still worth checking
- ○ Have both alternatives been compared over the same period?
- ○ Are all one-off costs and fees confirmed?
- ○ Are resale value, remaining debt and end assets documented?
- ○ Have you tested a cautious range for uncertain assumptions?
TRANSPARENT MATH
Formula inspector
Calculation steps
- The unit price is escalated annually by the entered change.
Substitution with your values
Sum of displayed components A = 145.30 + 1886.59 = 2031.89Sum of displayed components B = 1608.00 = 1608.00Total: 17436.20 / 1608.00CURRENT CONTEXT
Relevant developments
A sourced update may affect one of your assumptions. RATIOXA never changes a value silently.
ENERGY
KfW heating-subsidy conditions changed on 21 July 2026
An outdated subsidy assumption can materially change heat-pump economics.
May affect: Subsidy amount · Heat-pump investmentImportant: Actual yield and consumption may differ from the assumptions.
WHAT-IF
Snapshot current scenario
IMPORTANT DOCUMENTS
Prepare the decision
● Saved locallyQUESTIONS TO ASK
Ask before you sign
- Which performance is guaranteed?
- Which maintenance and extra costs apply?
- Which assumptions does the economics calculation use?
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