RFID charging cards are contactless cards (or key fobs) used to identify and authorize an EV driver at a charging station. By tapping the card on an RFID reader, the driver can start and sometimes stop a charging session without using a mobile app. The card contains a unique RFID identifier (token) that the charging platform associates with a specific user, contract, fleet account, or roaming provider.
RFID charging cards are common across public networks, workplaces, fleet depots, and multi-tenant residential sites because they are fast, familiar, and easy to manage at scale.
How RFID Charging Cards Work
A typical usage flow looks like this:
– The driver taps the RFID card on the charger
– The charger reads the RFID token and sends an authorization request via OCPP
– The backend validates whether the token is allowed (and which tariff applies)
– If accepted, charging starts and the session is linked to that token for billing and reporting
– Session data is stored as a charge detail record (CDR), including energy (kWh), timestamps, and costs
If the site has unreliable connectivity, chargers may use a local authorization list (offline whitelist) to allow known cards even when the backend is temporarily unreachable.
Why RFID Charging Cards Matter
RFID cards enable practical charging operations in many real-world scenarios:
– Fast “tap-and-charge” access for repeat users
– Clear accountability for billing by driver, tenant, employee, or fleet vehicle
– Reduced friction compared to app-only authentication (especially for visitors and fleets)
– Supports roaming when cards are issued by an eMSP and validated through OCPI
– Works well for controlled-access sites (gated parking, depots, staff-only areas)
Types of RFID Charging Cards in EV Charging
Different cards exist depending on who issues them and how they are used:
– Operator-issued cards
– Issued by the CPO to its own customers and linked to specific tariffs or subscriptions
– Roaming / eMSP cards
– Issued by an eMSP and accepted across multiple networks via roaming agreements
– Fleet cards
– Linked to fleet accounts, cost centers, vehicle IDs, or driver policies
– Tenant / workplace cards
– Assigned to residents or employees for access control and billing allocation
Key Operational Considerations
Managing RFID cards at scale involves:
– Token lifecycle management: issuing, activating, suspending, replacing lost cards
– Access rules: which sites/chargers the card can use, time windows, and limits
– Tariff assignment: public vs employee vs resident pricing, discounts, and subscriptions
– Security: preventing misuse, blocking stolen cards, auditing suspicious activity
– Offline fallback: keeping local whitelists updated to avoid failed authorizations
– Support and UX: clear signage, consistent reader placement, and fast response times
RFID Cards vs Other Authentication Methods
RFID charging cards are often combined with other methods:
– RFID: best for repeat, controlled-access users
– QR/app: flexible for guests and ad-hoc access
– Bank card (contactless): convenient for public “walk-up” charging (where supported)
– Plug & Charge: automatic authentication using ISO 15118 (vehicle and charger support required)
Many sites support multiple methods to maximize accessibility and reduce support workload.
Related Glossary Terms
RFID authentication
RFID billing
RFID reader
Local authorization list
OCPP
OCPI
Roaming
Charge detail records (CDRs)
kWh-based billing
Plug & Charge
ISO 15118