Public charging is priced on one of three bases: per kilowatt-hour of energy delivered, per minute connected, or a flat fee per session. The choice is not cosmetic. Each basis needs different metering, treats fast and slow cars differently, and fits different dwell patterns — so the operator picks a basis its chargers can meter honestly and drivers can understand in advance. No price levels are quoted here: levels are each operator’s own arithmetic.
Key Takeaways
- Per kWh prices energy, per minute prices time, per session prices the connection — each needs different metering.
- Per-minute pricing charges slow-charging cars more for the same energy; per-kWh removes that lottery where rules and metering allow.
- Per-kWh legality and metering accuracy are market rules — confirm them before the basis is chosen.
- Billing lives on the platform; the charger meters and reports. No price level here is a recommendation.
The Three Bases Side by Side
| Basis | What the metering must do | The fairness question it raises | Where it fits |
|---|---|---|---|
| Per kWh | Meter energy per session accurately; report it to the billing platform | Easiest to defend: two cars taking the same energy pay the same, whatever their speed | Destination and public sites where energy metering is in place and energy is the honest measure |
| Per minute | Meter time; the platform applies the rate to connected minutes | A minute buys different energy in different cars — a slow-charging car pays more for the same energy | Sites where bay time is the scarce resource and turnover matters more than energy precision |
| Per session (flat fee) | Record the session; no per-unit metering drives the price | Perfectly predictable, but blunt: a short top-up and a long charge pay the same | Controlled-access, bundled-parking or membership settings where simplicity beats precision |
| Idle fee (a component, not a basis) | Detect charge completion; apply the fee as a platform setting, with notice to the driver | Fair only if drivers are told before the session and can act on it — its purpose is releasing the bay, not revenue | Busy sites, where a finished car blocking the charger is the real cost |
Fairness Is a Metering Question Before It Is a Price Question
The per-minute problem is physical. Level 2 runs at 7–19 kW in U.S. DOT’s typical bands, set by the car as much as the charger; DC charging tapers as the battery fills. So the same paid minute delivers very different energy to different drivers. Per-kWh pricing removes that lottery — the driver buys energy, and slow sessions simply take longer — but it stands on the metering: energy must be measured and reported per session, a hardware-and-platform fact to confirm for the exact model. Operators also vary a basis by time of day — see time-of-use tariffs and scheduling. The driver-side view is in our guide to how much charging stations charge.
The Rules Check Comes Before the Basis
Whether an operator may bill per kWh at all, and the metering accuracy such a bill must stand on, are set by the market’s rules, which vary. Treat both as pre-launch confirmations — with your utility or regulator, and in your platform’s terms. A basis you are not permitted to use, or cannot meter to the required standard, is not a pricing strategy. Funded sites carry conditions: U.S. NEVI stations must accept contactless card payment with no membership required, under 23 CFR Part 680 — an access floor every structure sits on.
What the Hardware Has to Report
Pricing runs on the platform; the charger meters, identifies the driver and reports the session. In the EVDANCE range, the EV-AC03201T dual-connector AC station states OCPP 1.6J and RFID access — what a pricing platform pairs with — and its touchscreen is a display, not a payment terminal. The EV-RHDC30K-L is compact DC at 22 kW with OCPP 1.6J, priced by its operator on the energy or minutes it delivers. No EVDANCE listing states a billing platform — billing is the operator’s arrangement. Pricing questions for a planned network start from our commercial charging page or contact us.
Frequently Asked Questions
Which basis earns an operator the most?
There is no universal answer to quote. Earnings follow utilisation, dwell and your own electricity and site costs — measure them from your platform’s session records after a trial period, and reprice from evidence.
Can bases be combined — energy plus an idle fee, for example?
Yes: a per-kWh or per-minute basis with an idle component after charging completes is a common shape. Each element must be displayed before the session starts, with metering or detection behind it.
Why do per-minute prices upset some drivers?
Because charging speed varies by car and battery state. Two drivers paying for the same minutes can receive very different energy, and the slower one pays more per unit received. Per-kWh pricing is the structural answer where rules and metering allow it.
Related Reading
- How Much Do EV Charging Stations Charge? Pricing Models Explained
- Do EV Charging Stations Cost Money? Free vs Paid Charging Explained
- Smart Charging and Time-of-Use Tariffs: How Scheduling Cuts EV Charging Costs
