Calculator
How much you can save and when it pays back
Enter the building type, floor area and tariff. The estimate is a range, not a single figure: the real result depends on how the building’s systems are set up today.
Estimate
Savings per year
$12k–29k
5–12% of consumption · 86,800–208,320 kWh
- Payback
- 4–12 months
- Subscription, 31 metering points
- $465
- per month
- One-off costs
- $6,200
- Implementation, one-off: $5,000
- Gateways, 2, estimate: $1,200
An average day before and after, kW
- Today
- With Vatt, mid estimate
- Non-working hours
Consumption on an average day (annual ÷ 365): 4,756 kWh today, about 4,352 kWh with Vatt.
Where the savings come from
| Measure | Share | kWh per year | $ per year |
|---|---|---|---|
| Night and weekend base load | 1.5–4.0% | $3.6k–9.7k | |
| Climate following occupancy | 2.0–4.5% | $5k–11k | |
| Lighting by schedule and zone | 1–2% | $2.4k–4.9k | |
| No overlap of heating and cooling | 0.5–1.5% | $1.2k–3.6k |
How we calculate
- Consumption is estimated from floor area: 12,400 m² × 140 kWh/m² per year, a typical intensity for offices.
- Savings shares per measure are typical ranges for offices: night and weekend base load 1.5–4.0%; climate following occupancy 2.0–4.5%; lighting by schedule and zone 1–2%; no overlap of heating and cooling 0.5–1.5%.
- Schedule-related measures are multiplied by 1.00: you have 60 working hours a week against the usual 60. The longer a building stands empty, the bigger the potential.
- Metering points: 31 = floor area / 500 m², rounded up, + 6 (incomers, climate equipment, heat substation).
- Subscription uses the per-point tariffs. Implementation is $5,000 per building and covers up to 40 points; each additional point is $75. Gateways are 2 × $600, one per 16 points, rounded up.
- Payback = (implementation + gateways) / (monthly savings − monthly subscription).
- Tariff $0.14 per kWh. Use the price from your bill: savings in dollars scale with it linearly.
- The chart shows an average day (annual consumption ÷ 365) on the working-day profile with the mid savings estimate: schedule savings fall into non-working hours.
The estimate excludes lower capacity charges, reactive power penalties, heat and water. It is an estimate, not a promise: a month of monitoring gives the real picture.