The Open Charge Point Protocol (OCPP)

The Open Charge Point Protocol (OCPP)

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The Open Charge Point Protocol (OCPP) is a standardized communication protocol designed to facilitate interoperability between electric vehicle (EV) charging stations and central management systems. It was developed in 2009 by the Open Charge Alliance to ensure seamless communication across different EV charging networks.

OCPP enables EV charging stations to exchange information with management systems, such as availability, usage status, billing data, and diagnostic details. This ensures compatibility between various charging stations and software platforms, making it easier for EV drivers to access charging services without worrying about compatibility issues.

The protocol also supports advanced features like smart charging, which optimizes energy usage and integrates with utility programs. Its open nature encourages innovation, reduces development costs, and promotes competition among manufacturers and service providers.

If you’re exploring EV charging development, OCPP is a key component to consider for creating scalable and user-friendly charging solutions.

Versions Overview:

  • OCPP 1.6: This version is widely used and supports smart charging, remote start/stop, diagnostics, and firmware management. It operates over WebSocket or SOAP.
  • OCPP 2.0 and 2.0.1: These versions introduce advanced capabilities like device management, extended security measures (PKI for authentication), and support for ISO 15118, which facilitates Plug and Charge features. They also add functionality for better transaction handling and reporting.

Technical Architecture:

OCPP defines communication between two entities:

  • The protocol uses message exchange formats (request-response pattern) for operations like authorizing users, starting/stopping sessions, retrieving diagnostics, etc.

Applications in Development:

  • Interoperability: Ensuring different charging hardware and software communicate seamlessly.
  • Smart Charging: Optimizing power usage based on grid capacity and energy pricing.
  • Scalability: Supporting large networks of charging stations.
  • Security: Implementing secure authentication and encrypted communication.
  • Future-Ready Features: Compatibility with standards like ISO 15118 for automated services (e.g., Plug and Charge).

If you are an EV company or charging infrastructure developer, OCPP should be part of your development strategy. Sunstream embedded development group can support in your strategy to make OCPP implemented in your products. Reach out to us to discuss this in detail.