OCPP 1.6 vs OCPP 2.0.1 for EV Charging Network Operators

OCPP 1.6 vs OCPP 2.0.1 for EV Charging Network Operators: OCPP 2.0.1 is becoming the preferred option for new EV charging networks because it supports stronger security, advanced device management, smart charging, and future vehicle-grid services. OCPP 1.6 still works well for existing deployments, with millions of chargers using it worldwide since its release in 2015, but operators planning large-scale expansion should evaluate OCPP 2.0.1 for long-term compatibility.

Open Charge Point Protocol (OCPP) has become the standard communication method between EV chargers and charging management systems. Developed by the Open Charge Alliance (OCA), OCPP allows charging stations from different manufacturers to connect with backend platforms without relying on one supplier. Since OCPP 1.6 was released in 2015, it has been adopted by a large number of charging operators, with many public charging networks still using this version in 2024.

The wide adoption of OCPP 1.6 created a stable foundation for EV charging services, but charging networks have changed significantly. Early charging systems mainly focused on starting and stopping charging sessions, collecting meter data, and processing payments. Newer networks must support thousands of chargers, renewable energy integration, fleet charging, remote maintenance, and stronger cybersecurity requirements.

“OCPP 1.6 helped standardize basic charger communication, while OCPP 2.0.1 was developed for more complex charging environments.”

The difference between the two versions can be seen from their design approach. OCPP 1.6 uses a simpler message-based structure. Chargers send information such as charging status, energy consumption, and fault messages to the backend platform. This model works well for standard charging operations but provides fewer options when operators need detailed control of large charging networks.

OCPP 2.0.1 was officially released in 2020 and introduced a more advanced device management structure. Instead of treating a charger as a single unit, it allows operators to manage individual components, settings, and functions inside the charging equipment.

The improved device management in OCPP 2.0.1 changes how operators maintain charging networks. A large operator managing 10,000 charging points may receive thousands of status messages every day. With OCPP 1.6, identifying the exact source of a charger problem often requires additional diagnostics. OCPP 2.0.1 provides more detailed information about individual modules, allowing operators to identify equipment issues more accurately.

This difference becomes more important as charging networks continue growing. According to industry reports, global public EV charging points exceeded 4 million units in 2024, while commercial operators increasingly manage large distributed networks rather than individual charging locations.

“For a network with hundreds or thousands of chargers, detailed equipment information reduces the time needed for maintenance and service management.”

Smart charging is another area where OCPP 2.0.1 provides additional capabilities. Electricity demand from EV charging can create pressure on local power systems, especially when many vehicles charge at the same time. A charging station connected to a smart energy platform can adjust charging power based on electricity prices, grid conditions, and vehicle requirements.

OCPP 1.6 supports smart charging through charging profiles. Operators can set charging limits according to time periods, such as reducing charging speed during peak electricity hours. However, the system provides fewer options when managing complex charging scenarios involving multiple chargers or renewable energy sources.

OCPP 2.0.1 improves charging schedule management and supports more advanced energy coordination. For example, an electric fleet company operating 500 delivery vehicles can set different charging priorities according to departure schedules and available electricity capacity.

Security improvements are also an important difference between the two protocols. EV charging networks are connected systems that exchange operational data, payment information, and equipment status. As the number of connected chargers increases, operators require stronger protection methods.

OCPP 1.6 provides secure communication through methods such as HTTPS and WebSocket security. These functions remain useful for many existing charging networks. However, OCPP 2.0.1 introduced a more complete security framework with improved certificate handling and stronger authentication options.

OCPP 2.0.1 includes security improvements designed for large-scale charging networks expected to operate for many years.

The need for stronger security is growing as charging infrastructure becomes more connected. A 2023 report from the International Energy Agency showed that global electric car sales exceeded 14 million units in 2023, increasing demand for reliable charging infrastructure. More connected vehicles and chargers require better communication protection between hardware and software platforms.

Another major difference is support for future charging technologies. ISO 15118 communication enables functions such as Plug & Charge, where vehicles can authenticate automatically without using physical cards or mobile applications.

OCPP 1.6 was created before ISO 15118 became widely used, so integration often depends on additional solutions from equipment manufacturers. OCPP 2.0.1 was designed with future vehicle communication requirements in mind.

“As EV technology develops, charging networks need protocols that can support more than basic charging transactions.”

For operators building new charging infrastructure, software platforms also play an important role. Platforms such as the GDON AIoT charging platform combine charger communication, remote management, energy monitoring, and operational data services to support modern charging networks.

Migration from OCPP 1.6 to OCPP 2.0.1 requires careful planning. Many operators already have thousands of OCPP 1.6 chargers installed, and replacing all equipment at once may not be practical. Hardware compatibility, software updates, testing processes, and technical training all need to be considered.

A common approach is gradual migration. Operators continue running existing OCPP 1.6 chargers while installing new OCPP 2.0.1-compatible equipment for expansion projects. This method allows companies to improve network capabilities without replacing their entire infrastructure.

For small charging operators with limited equipment, OCPP 1.6 can still meet daily operational needs. The protocol supports basic charging services, remote control, and transaction management. Many existing public chargers will continue using OCPP 1.6 for years.

For companies developing new charging networks, OCPP 2.0.1 provides more options for future expansion. Fleet operators, highway charging providers, and energy companies are more likely to benefit from advanced device management, smart charging functions, and improved security features.

The selection between OCPP 1.6 and OCPP 2.0.1 depends on network size, business plans, and technology requirements. OCPP 1.6 remains a reliable choice for existing charging infrastructure, while OCPP 2.0.1 better matches the requirements of modern EV charging networks expected to support larger numbers of vehicles, chargers, and energy services in the coming years.