OCPI vs OCPP: A comprehensive guide to charge point protocols

The world of EV charging is driven by innovative technologies and smart solutions that make charging seamless and efficient. At the heart of this progress are two key protocols, defining how charging stations connect, communicate, and improve the charging experience for drivers.

OCPI and OCPP together create a powerful foundation for the EV charging ecosystem. Read the article and discover what makes OCPI and OCPP so essential and how they pave the way for sustainable and more connected mobility.

What is OCPI?

The Open Charge Point Interface (OCPI) is a protocol that links EV charging point operators (CPO) with service providers. OCPI enables data exchange between the hardware and software components of various CPOs and eMSPs, enabling electric vehicle drivers to move freely between charging networks. With OCPI, network operators can exchange information about bookings, transactions, location and charging records with each other. As a result, EV drivers gain access to any OCPI-compliant charging stations. Furthermore, OCPI can show customers real-time information on energy prices and availability.

Core features of OCPI

The most important OCPI features include:

• Real-time data – helps drivers quickly find available stations and provides real-time information about charger availability and energy cost.
• Charging session authorisation – network operators can manage bookings and authorise charging sessions.
• Platform monitoring – service providers and network operators can manage the network data.
• Transaction management – supports exchanging transaction data and billing of charging sessions.
• Roaming – peer-to-peer roaming allows direct access to charging sessions across multiple networks.
• Hub roaming enables interaction within a predefined network group, while blended roaming connects individual charging stations to various networks.

What is OCPP?

The Open Charge Point Protocol (OCPP) is a free and open communication protocol that allows software to interoperate with hardware as long as both are OCPP-compliant. OCPP is the vital element that enables a networked charging station to communicate with back-end systems managed by service providers.

OCPP integrates EV charging stations that belong to diverse manufacturers and administrators. Thus, network operators can choose hardware and software according to their preferences or price conditions, not only compatibility.

Key features of OCPP

What features characterise OCPP?

• Smart Charging – OCPP manages load by optimising energy consumption and sets prices dynamically, balancing demand with available network capacity.
• Plug and Charge – OCPP supports ISO 15118, a standard that facilitates secure communication between the EV and the charging station. This feature allows drivers to start charging automatically, without manual authentication or initiating a session through an app or card.
• Interoperability – the Open Charge Point Protocol provides seamless communication with a central back-end system so charging stations from different brands can work together.
• Scalability – network operators can easily scale infrastructure and add new charging points without being concerned about compatibility issues.
• Security – OCPP 2.0.1 includes advanced security functionalities to protect the EV charging ecosystem from cyber threats.

Why are OCPP and OCPI necessary in communication between charging stations?

The roles of OCPI and OCPP are supplemental in narrowing the communication gap in the EV industry. OCPI, like mobile roaming, is the basis for different EV charging networks’ interoperability. The functioning of OCPI allows for a seamless exchange of information about station locations, availability and prices. This way, users can select a suitable station, and the electric network is not overloaded.

Meanwhile, the OCPP establishes a uniform communication language between EV charging stations and their central management systems. This is essential to guarantee compatibility, increase operational efficiency and minimise the number of stations taken out of service.

OCPI and OCPP create an integrated and resilient network of EV charging infrastructure that is an essential element in the transition from fuel to electricity.

Similarities and differences between OCPI and OCPP protocols

Both OCPP and OCPI are crucial to the smooth operation of EV charging stations. However, the two charging protocols have different characteristics despite their similar names. Check out a brief comparative analysis of OCPI and OCPP standards. This chapter concludes with a convenient table to help you organise relevant information.

What do OCPP and OCPI have in common?

OCPI and OCPP are non-negligible in organising communication networks between different actors in the EV charging industry. Both protocols link station operators, network managers and service providers. With them, all the charging services can work together and integrate their services smoothly.

The Open Charge Point Interface and the Open Charge Point Protocol are also crucial for improving electric vehicle charging infrastructure. These protocols significantly contribute to charging optimisation, so EV drivers can freely embark on distant journeys without worrying about charging their cars.

OCPP vs OCPI: the differences

What should you remember about the differences between OCPP and OCPI? OCPI was created to enable interoperability and facilitate network roaming. It provides EV drivers with unhindered access to a wide charging network. In contrast, OCPP focuses on linking charging points and their central management systems. It highlights the need for strong station management and increased operational efficiency.

Benefits of using charging protocols in eMobility companies

What advantages of open protocols do the service providers value? Companies using OCPP pointed out the following features:

• optimisation of charging point management efficiency,
• supervision of charging stations,
• remote maintenance and implementation of updates,
• compatibility with equipment from various manufacturers.

What elements of OCPI help charge station operators in their daily work?

• charging management across different networks,
• easy connectivity between networks,
• real-time data exchange,
• compatibility across various charging infrastructures.

The impact of Open Charge Point Interface on charging experience

The OCPI protocol simplifies EV drivers’ access to charging networks without needing separate accounts or subscriptions. During their journey across the country, a driver can use any participating charging station nationwide, reducing stress and ensuring convenience across diverse locations.

OCPI also provides real-time data, which lets drivers plan the route efficiently. Dynamic pricing enables cost-effective and flexible charging options.

The role of Open Charge Point Protocol in managing EV charging infrastructure

OCPP enables seamless communication between EV chargers and Charge Point Management Systems (CPMS). This way, OCPP enhances charging station efficiency and reliability. The EV charging network is secure through advanced encryption and authentication methods that protect user data and prevent unauthorised access. It also supports anomaly detection to identify potential threats.

OCPP enables remote oversight of charging stations, providing insights into energy usage, charging patterns, and technical issues. Remote diagnostics reduce the need for on-site servicing and significantly cut maintenance costs. Firmware updates across components improve performance, fix vulnerabilities, and introduce new features. Updates are scheduled during low-usage periods, maintaining consistency and minimising service interruptions.

What challenges may you face during the implementation of the OCPP and OCPI protocols?

Integrating the OCPP and OCPI not only improves the management and communication between EV charging stations. It also brings the challenges of connecting heterogeneous systems and maintaining a consistent UI across different charging networks. Explore what you should consider when implementing these protocols in your charging business.

Data accuracy

In the OCPI protocol, you must ensure accuracy in sharing station locations, pricing details, and real-time statuses between operators. It is essential for ensuring the data effectiveness and speed.

System flexibility

When integrating different systems, you need to ensure that your infrastructure is flexible and easily scalable. For example, OCPP must support essential charging processes, advanced energy load balancing, and detailed diagnostic procedures while requiring robustness and uniformity regardless of hardware manufacturers or software versions.

UX consistency

Authentication protocols, payment transactions, and live feedback must be standardised in any network to ensure users do not encounter issues when using EV chargers.

Conclusion

OCPP and OCPI are the perfect duo for creating a smooth and reliable EV charging experience. Together, they help EV drivers, operators, and providers work seamlessly, making charging more convenient. At Happy Team, we’re passionate about building smart, sustainable mobility solutions. If you’re looking to take your EV charging infrastructure to the next level, let’s chat! Reach out to us – we’d love to help turn your ideas into future-ready products for the eMobility industry.