01
Customer and problem
- ChargeWindow is for residents whose building or site chooses the EV charging provider.
- ChargeWindow launches for England first and defaults to pounds and miles in the UK, US dollars and miles in the US, and euros and kilometres across continental European regions.
- It shows whole session cost when advertised energy rate excludes fixed, time, or idle fees.
02
Inputs and outputs
- Inputs: energy added, energy rate, fixed session fee, time and idle fees, and vehicle consumption.
- Outputs: session total, effective price per kWh, cost per 100 miles, and a comparison card.
- Formula: energy × rate + fixed session fee + time and idle fees.
03
Price and privacy
- Price is £29 once, with no subscription and no account.
- Calculation is deterministic. Calculator inputs stay in browser or mobile device.
04
Limits
- ChargeWindow does not supply live prices, charger availability, maps, vehicle data, receipt sync, or currency conversion.
- Provider app, charger, building notice, or contract remains source for current station-specific price and terms.