The difference between OCPP 1.6 and OCPP 2.0

What is OCPP

OCPP (Open Charge Point Protocol) is an open standard communication protocol between electric vehicle charging stations and central management systems. It enables remote management, monitoring, access control and billing.

Key Differences

OCPP 2.0 introduced major architectural changes and new functionality compared to the older OCPP 1.6 version. This includes support for ISO 15118 “Plug & Charge”, improved smart charging features and more scalable message handling.

Message Definitions

While OCPP 1.6 uses centralized message definitions, OCPP 2.0 utilizes a decentralized approach allowing custom extensions. This provides more implementation flexibility to meet specific user needs.

Transport Layer

OCPP 2.0 replaces SOAP/HTTP with a modernized JSON messaging structure over WebSocket transport for higher performance scalability.

Security

Security is enhanced in OCPP 2.0 by utilizing TLS encryption for all communications and integrating OAuth 2.0/OpenID Connect user authentication.

Smart Charging

OCPP 2.0 expands smart charging capabilities through additional meter values, charging schedules, local authorization lists and support for V2G bi-directional power flow.

Remote Triggering

Remote triggering of charging and other operations is easier in OCPP 2.0 with well-defined asynchronous action models compared to OCPP 1.6 polling requests.

Installation & Configuration

The installation and configuration process is streamlined in OCPP 2.0 by utilizing modern cross-platform technologies and approaches aligned with IoT best practices.

Backwards Compatibility

While OCPP 2.0 introduces many new capabilities, it offers a compatibility mode to still work with older OCPP 1.6 central systems during a transition period.

The Future

OCPP 2.0 provides a future-proof foundation for advanced functionality like autonomous charging, vehicle-to-grid integration, next-gen smart grids and laye the groundwork for anticipated OCPP 3.0.

FAQs

What are the main benefits of upgrading to OCPP 2.0?

Higher performance, better scalability, enhanced security, more advanced smart charging capabilities.

Is OCPP 2.0 fully backwards compatible?

A compatibility mode allows OCPP 2.0 systems to still work with OCPP 1.6 central

systems. Can existing charging stations be upgraded to OCPP 2.0?

Yes, for many stations a firmware or software upgrade can enable OCPP 2.0 support.

What happens if we keep using OCPP 1.6?

You miss out on major improvements but it will still work, however support and evolution for 1.6 is being phased out.

When should we transition fully to OCPP 2.0?

Most experts recommend transitioning as soon as feasible to leverage the benefits and ensure future compatibility.