Run the numbers
The calculator
Your fleet, your tariffs, your term. The result appears immediately, with no email required to see it. The email gate sits on the export, where it belongs.
ROI calculator
Your fleet
Total vehicles in scope.
Sets the device tier and price band.
Charging orchestration value scales with depots.
Pre-filled by vehicle type. Edit if you know better.
Pre-filled by region. Use your blended rate.
36-month terms carry the lower band.
Display only. Source figures are $ and £.
The capital decision
Assets under the replacement clause.
Default $100,000 per bus pack (brief §2.7).
The calendar date the clause fires on.
Share of packs measured as not needing replacement this cycle. 20% is the conservative case.
Use the currency toggle in operator mode. It applies to both modes. Verification figures are sourced in USD.
| Hardware + install (ZAPPP Pro, deployed) | - |
|---|---|
| Subscription ($30/veh/mo × fleet × term) | - |
Depot orchestration is quoted per depot and excluded from this estimate.
£14,000–£28,000 per bus over the lifecycle, scaled to your electric share. Shown as a range, because a point estimate would be a lie.
15–25% of energy spend (- over the term), from your kWh and tariff inputs.
Your numbers: 36-month term
The net position -Payback: - (conservative end of the range)
Cost vs savings
Fleet × pack cost. A calendar date, with no performance evidence.
Packs measured as not needing replacement this cycle.
$25/vehicle/month over 12 months, - of the capital decision it informs.
The verification case: 20% deferral
Return ratio -Conservative (20% deferral) on a 200-bus fleet returns 65:1.
The capital decision
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How we calculate this
Every assumption, labelled:
- Battery lifecycle exposure: £14,000–£28,000 per bus over 12 years, scaled to other vehicle types by pack size relative to a 300 kWh bus. (source: GoMetro fleet economics, brief §2.7)
- Charging inefficiency: 15–25% of energy spend, on the electric share of the fleet. (source: brief §2.7)
- Energy throughput: 0.2 pack-cycles per day per vehicle. Raise the pack size and tariff inputs to match your utilisation. (illustrative planning assumption)
- Hardware: Mini $125 / Box $249 / Pro $499 total deploy. (source: brief §2.5)
- Subscription bands: $5–$62 per vehicle per month by segment and term; 36-month terms carry the lower band. (source: brief §3, §7.13)
- Verification economics: $25/vehicle/month, 12-month programme; $100K pack; 200-bus reference returns 65:1 at 20% deferral. (source: EV-CAN + ZAPPP transaction brief)
- Currency conversion is static ($1 = £0.79 / €0.92 / R18.50). Illustrative assumptions, not live FX.
- Ranges are shown deliberately. Precision without evidence is marketing.