Tap-to-pay is a contactless payment method that lets an EV driver pay for charging by tapping a contactless bank card or mobile wallet (such as NFC-enabled phone or watch) on a payment reader. In EV charging, tap-to-pay is typically provided through a payment terminal integrated with the charger or installed as a separate device in the charging kiosk/cabinet.
Tap-to-pay is also commonly referred to as contactless card payment or NFC card payment.
Why Tap-to-Pay Matters in Public EV Charging
Tap-to-pay improves accessibility and conversion because it reduces friction for drivers who don’t want to download an app or create an account:
– Enables ad-hoc charging without subscriptions
– Reduces barriers for tourists and occasional users
– Supports compliance expectations for easy public payment access (market-dependent)
– Increases charger utilization by simplifying the payment journey
– Reduces customer support load caused by app onboarding issues
For high-traffic sites such as supermarket EV charging and urban hubs, simple card payment can significantly improve user experience.
How Tap-to-Pay Works at a Charger
A typical tap-to-pay workflow includes:
– Driver taps a card/phone on the reader
– The terminal authorizes payment (often a pre-authorization)
– The charging session starts and energy is delivered
– The session cost is calculated (usually per-kWh billing, sometimes time-based fees)
– The final amount is captured and a receipt may be provided digitally
The exact flow depends on local payment rules, tariff design, and backend integration.
Tap-to-Pay vs RFID and App Payments
Tap-to-pay is different from other common charging authentication methods:
– RFID identifies a user account for billing through the CPO/eMSP system
– App payments require onboarding and are account-based
– Tap-to-pay uses a bank card/mobile wallet for immediate payment without a charging account
Many public networks offer multiple methods to maximize accessibility.
Technical and Operational Considerations
Implementing tap-to-pay typically requires:
– A compliant payment terminal and merchant acquiring setup
– Strong data security practices and payment compliance (PCI DSS)
– Reliable connectivity for authorization and settlement (Ethernet/LTE)
– Clear pricing display and customer information (especially for public use)
– Processes for refunds, chargebacks, and receipt delivery
– Physical security and tamper resistance for the payment reader
Tap-to-pay terminals also need ongoing monitoring to ensure availability and to reduce failed payment attempts.
Benefits and Limitations
Key benefits include:
– Fast, familiar user experience for drivers
– Wider accessibility for ad-hoc public charging
– Reduced reliance on apps and roaming accounts
– Potentially higher utilization at destination sites
Limitations to consider:
– Added hardware cost and maintenance requirements
– Payment transaction fees and merchant account complexity
– Vulnerability to vandalism in public environments without robust housing
– Offline scenarios can prevent authorizations if connectivity is poor
Related Glossary Terms
Payment Terminals
Payment Gateway Integration
Per-kWh Billing
Pay-as-you-go Charging
PCI DSS
NFC Reader
Tamper Detection
OCPP