OCPP 2.0.1 can support secure offline token validation for RFID-enabled EV chargers without cloud connectivity, but it does not inherently maintain ISO 15118 compliance for EVSEs that require it. The protocol allows for local token validation through its built-in authorization mechanisms, but ISO 15118 compliance requires secure communication with the vehicle and a certified secure element, which typically needs cloud or local certificate management.
How offline token validation works in OCPP 2.0.1
OCPP 2.0.1 introduces enhanced local authorization capabilities, including support for local token validation using secure storage and cryptographic functions. This allows chargers to validate RFID tokens without requiring constant cloud connectivity. The protocol supports offline authorization through local databases and secure key management, enabling operations in environments with limited or no internet access.
However, this functionality is limited to token-based authorization and does not cover the full scope of ISO 15118, which includes secure communication with the vehicle, cryptographic handshakes, and secure element management. For ISO 15118 compliance, additional hardware and software components are required, such as a secure element and certified communication protocols.
What this means for EV charging infrastructure deployment
For fleet operators or infrastructure providers deploying chargers in remote or low-connectivity areas, OCPP 2.0.1’s offline token validation is a practical solution for managing access. It ensures that charging sessions can begin and end without relying on real-time cloud validation, improving operational resilience.
However, for applications requiring ISO 15118 compliance—such as DC fast charging with vehicle-to-grid (V2G) capabilities—operators must ensure that their chargers include certified secure elements and support for the required communication protocols. This often means integrating additional hardware or software solutions beyond OCPP 2.0.1 alone.
Related Reading
For more on related topics, see: OCPP 2.0.1 vs ISO 15118: Session Management and Authentication.
Further reading: EV Charging Software Features | Tecell CMS (UnityCharge) – OCPP, Billing, Mobile
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