Clear Definition
Plug & Charge, also called PnC, is an automatic charging authentication function based on ISO 15118. With Plug & Charge, the driver only needs to plug the charging connector into the vehicle. The EV and charging station automatically complete identification, authentication, and charging authorization.
In traditional charging, the user may need an RFID card, mobile app, QR code, or manual payment. With Plug & Charge, the vehicle itself can become the secure identity carrier.
CharIN describes Plug & Charge as an important ISO 15118 feature involving secure communication, certificates, TLS, and digital signatures.
Application Scenarios
Plug & Charge is suitable for:
Application Description
Public DC fast charging Improves driver experience
Highway charging network Reduces operation complexity
Fleet charging Simplifies vehicle authorization
Premium EV charging Creates a seamless charging experience
ISO 15118 charging stations Enables automatic contract-based authentication
Technical Flow
A simplified Plug & Charge process:
Driver plugs the charging connector into the EV.
EVCC and SECC establish ISO 15118 communication.
Secure communication channel is created.
Vehicle certificate is checked.
Charging contract information is verified.
Charging station or backend authorizes the session.
Charging starts automatically.
Billing information is handled through the backend system.
Charging session ends and records are uploaded.
Product Relationship Diagram
EV Contract Certificate
|
v
EVCC
|
| ISO 15118 Plug & Charge
v
SECC
|
v
Charging Station Controller
|
v
OCPP Backend / CPO Platform / Payment System
Plug & Charge vs RFID / App
Item Plug & Charge RFID Card Mobile App
User action Plug in only Swipe card Scan or operate app
Authentication Vehicle certificate Card ID User account
User experience Best Simple Depends on network/app
Technical complexity High Low Medium
Backend requirement High Medium Medium
Standard relation ISO 15118 OCPP / local system OCPP / payment system
Standard Protocol Explanation
Plug & Charge usually requires coordination between:
ISO 15118 communication
EVCC and SECC certificate handling
TLS secure communication
Contract certificate management
Charging station backend
OCPP platform
CPO / eMSP business system
FAQ
Q1: Does Plug & Charge mean free charging?
No. Plug & Charge only automates authentication and authorization. Billing still depends on the charging operator and service provider.
Q2: Is Plug & Charge only for DC charging?
No. ISO 15118 can be used for both AC and DC charging, depending on the system design and market requirements.
Q3: Can every EV use Plug & Charge?
No. The EV, charging station, SECC, backend platform, and certificate system must all support it.
Share Charging Project Capability
Share Charging can help customers evaluate whether Plug & Charge is necessary for their charging station project. For CCS2 DC fast charging projects, we can support:
ISO 15118 communication design
SECC selection and integration
OCPP platform matching
Charging authorization process planning
Plug & Charge technical feasibility analysis
Testing support with compatible vehicles or simulators
