# Appliance replacement payback calculator — AppliancePayback

Canonical: https://getecoback.com/en/workbench/appliancepayback.html
Language: en
Method version: 2026-09-19.2

Estimate replacement payback under three energy-price assumptions.

## How this tool works

Annual saved kWh = (old W − new W) × hours/day × days/year ÷ 1,000. Payback years = extra purchase cost ÷ annual saving. Price scenarios use 75%, 100% and 125% of your price.

## Input format

- Current average power (W): `oldwatts`
- Replacement average power (W): `newwatts`
- Operating hours per day: `hours`
- Operating days per year: `days`
- Extra purchase cost (your currency): `price`
- Electricity cost per kWh (same currency): `rate`
- Comparison period (years): `life`

## Reproducible example

All prefilled business examples are fictional. Replace them with your own checked inputs.

```json
{
  "columns": [
    "Energy-price scenario",
    "Price / kWh",
    "Annual energy saved (kWh)",
    "Annual saving",
    "Payback years",
    "Net after comparison period"
  ],
  "rows": [
    [
      "Lower price",
      "0.2250",
      "132.00",
      "29.70",
      "6.1",
      "57.60"
    ],
    [
      "Your price",
      "0.3000",
      "132.00",
      "39.60",
      "4.5",
      "136.80"
    ],
    [
      "Higher price",
      "0.3750",
      "132.00",
      "49.50",
      "3.6",
      "216.00"
    ]
  ]
}
```

## Limits and assumptions

Power is an average draw, not necessarily the label maximum. Operating hours and appliance lifetime are user assumptions. No inflation, financing or maintenance difference is included.

Negative savings mean the new appliance consumes more under these inputs.

Browser-based tools · Your inputs stay in this browser. No account, cloud backup or paid membership is provided.

[RFC 4180 — CSV format](https://www.rfc-editor.org/rfc/rfc4180)