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OCPP is an open communication standard for electric vehicle charging stations and charging station management systems. OCPP defines how charging stations and central management systems exchange information, thereby achieving interoperability between hardware and software from different manufacturers.
The OCPP versions include OCPP 1.2, OCPP 1.5, OCPP 1.6, OCPP 2.0, OCPP 2.0.1, and OCPP 2.1. OCPP 1.6 is still widely deployed, while OCPP 2.0.1 and OCPP 2.1 support advanced use cases such as intelligent charging, security, and energy management.
The Open Charging Point Protocol (OCPP) consists of two main components: a charging station and a central management system. This protocol specifies the message flow for operations such as charging start and stop, authorization, metering data reporting, and firmware updates.
Key Advantages
The main advantages of OCPP include interoperability, cost reduction, scalability, improved security, and supplier independence.
With the support of the Open Charging Alliance, utility companies, manufacturers, and software suppliers, the adoption of OCPP has reached a global scale. To comply with the OCPP standard, charging stations and management platforms must support certified protocol implementations.
Open Charging Point Interface (OCPI) is complementary to OCPP, but has different functions. OCPI focuses on roaming and data exchange between service providers, while OCPP enables communication between charging stations and the backend.
What are the versions of OCPP?
The versions of OCPP include OCPP 1.2, OCPP 1.5, OCPP 1.6, OCPP 2.0, OCPP 2.0.1, and OCPP 2.1. Each OCPP version extends the functionality of the protocol to meet the growing demand of the electric vehicle charging market. OCPP 1.2 and 1.5 introduced the first interoperable communication standard. OCPP 1.6 has become the most widely used version. OCPP 2.0.1 and OCPP 2.1 provide advanced features for energy management, diagnosis, and safety.
How does OCPP operate?
The working principle of OCPP is to use standardized messages to achieve communication between charging stations and central systems. OCPP standardizes the communication between electric vehicle chargers (charging stations) and backend systems, ensuring the interoperability of the entire electric vehicle charging ecosystem.
The following list explains the working principle of OCPP by describing the core components and systems involved in communication.
This server is usually hosted in the cloud and serves as the central node for charging stations to send and receive messages. The OCPP server handles requests such as session authorization, meter readings, and firmware updates.
The charging station communicates with the server using OCPP messages. It reports status, receives start and stop commands, and shares transaction data. The charger relies on this protocol to ensure compatibility with different backend systems.
The operator is responsible for managing the charging infrastructure. Through OCPP, CPO monitors the performance of charging stations, processes user authentication, and manages billing for the entire network.
CPMS is a backend software that connects to charging stations through OCPP servers. The Charging Station Management System (CPMS) provides operators with dashboard, analysis, and remote control functions to ensure efficient network operation.
This gateway or API acts as a bridge to connect systems that do not support OCPP. OCPP gateway or API converts data formats to enable third-party services and applications to interact with chargers and management systems that comply with OCPP standards.
Post time: Sep-21-2026
