Pricing per kWh is an EV charging tariff model where the customer pays based on the energy delivered, measured in kilowatt-hours (kWh). The price is typically expressed as €/kWh (or local currency per kWh), making it similar to how electricity is priced for households and businesses.
Why Pricing per kWh Matters in EV Charging
Pricing per kWh is widely used because it is intuitive and generally seen as fair. It helps:
– Align cost with actual energy consumption (pay for what you use)
– Improve price transparency and comparability between charging sites
– Avoid penalizing slow-charging vehicles compared to time-based tariffs
– Support fleet reporting and cost allocation (energy per vehicle, route, depot)
– Provide a clear basis for revenue forecasting tied to delivered energy
How Pricing per kWh Works
A typical pricing-per-kWh session includes:
– The charger or meter records energy delivered during the session
– The CPMS applies the configured tariff (€/kWh) to the measured kWh
– Optional additional fees may be added (session fee, parking fee, idle fees)
– The receipt/invoice shows kWh delivered, €/kWh rate, and total cost
Metering and Compliance Considerations
Because pricing per kWh relies on measured energy, accuracy and legal metrology can matter:
– MID metering is commonly required or strongly preferred in the EU for billing-grade measurement
– Some markets require additional national approvals or sealing procedures
– Audit trails (meter start/end values, timestamps) support dispute handling and transparency
Common Tariff Structures Using €/kWh
Operators often combine per-kWh pricing with other components to manage utilization:
– Pure per-kWh: only energy-based cost
– Hybrid: €/kWh + a session fee
– Turnover control: €/kWh + idle fee policy after charging completes
– Time-of-use: different €/kWh rates for peak/off-peak tariffs
– Tiered pricing: price changes after a kWh threshold (less common)
Benefits
– Fair for vehicles with different charging speeds and battery sizes
– Easy for users to understand and compare
– Works well for fleets and carbon reporting (kWh → emissions factors)
– Compatible with smart charging (throttling changes time, not billed energy)
Limitations and Practical Considerations
– Regulatory restrictions can apply if metering is not compliant
– Per-kWh pricing alone may not prevent bay blocking; idle fees are often needed
– Requires reliable meter data transfer and secure storage for billing accuracy
– Pricing transparency is critical to avoid disputes, especially with dynamic tariffs
Related Glossary Terms
Per-kWh Billing
kWh-Based Billing
MID Metering
Charging Session Revenue
Idle Fee Policy
Idle Fees
Pay-as-you-go Charging
Pay-per-use Charging
Payment Gateway Integration
CPMS