What Is ISO 15118?
ISO 15118 is the international standard defining the digital communication interface between an EV and an EV charging station. It adds a high-level communication (HLC) layer enabling: Plug and Charge (PnC) — automatic authentication with no RFID needed; Smart Charging / V2G — dynamic power negotiation based on grid signals; Secure TLS communication; and Signed meter values for billing compliance.
ISO 15118-2 vs. ISO 15118-20
ISO 15118-2 is the currently mandatory version for Europe and North America, covering AC and DC smart charging with basic Plug and Charge. ISO 15118-20 is the next-generation standard adding V2G bidirectional charging and advanced smart charging — future-proofing your product.
DIN 70121: Still Required in 2025?
Yes. DIN 70121 is the German-originated predecessor still required because millions of European EVs only implement DIN 70121, and European DC charger conformance testing still mandates it. A complete ISO 15118 solution for DC fast chargers must support both DIN 70121 and ISO 15118-2 simultaneously.
OCPP + ISO 15118 Integration
ISO 15118 Plug and Charge uses a PKI certificate chain requiring your OCPP 2.0.1 backend to implement ISO 15118 certificate management messages, connect to the Contract Certificate Pool (e.g., Hubject), deliver contract certificates to chargers, and handle certificate rotation.
Share Charging ISO 15118 Solution Package
- SECC QC PLC Module: TÜV + DEKRA pre-certified, ISO 15118-2/20 + DIN 70121
- Complete ISO 15118 Communication Stack: STM32 MCU, OTA firmware updates
- Plug and Charge PKI Support: Certificate provisioning workflow included
- OCPP 2.0.1 Module: Ready for ISO 15118 integration with major EV roaming networks
Contact us: zhaishuoyun@share-charging.com | WhatsApp: +8615253120062
