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Intelligently connecting charging infrastructure for fleets

OCPP or API: Which communication solution is more secure, streamlined, and cost-effective for modern charging infrastructure?

Companies integrating charging infrastructure will, sooner or later, reach a point where it's no longer just about hardware. The crucial question becomes: How do the charging stations communicate with existing systems? And which architecture is more efficient, secure, and cost-effective in the long term?

In the industry, OCPP – the Open Charge Point Protocol – has been the standard for communication between charging stations and backends for years. At the same time, modern solutions are increasingly relying on direct API connections. Both approaches pursue the same goal: controlling, billing, and evaluating charging processes. However, the path to achieving this differs fundamentally.

OCPP: The established standard for stationary charging infrastructure

OCPP was developed to make charging stations from different manufacturers compatible with various backend systems. This openness is particularly important in public or semi-public charging networks: operators want to remain flexible and not be tied to a single system.
The stationary JUICE CHARGER me 3 directly supports OCPP. This allows the wallbox to communicate with both the native Juice backend and third-party systems. Functions such as station and user management, monitoring, and billing run conveniently via the Charger Dashboard.
For larger charging parks or publicly accessible infrastructure, OCPP offers clear advantages:

  • Cross-manufacturer compatibility
  • Integration into existing backend systems
  • Scalability for larger installations
  • Standardized communication

However, this architecture also entails additional effort. OCPP always requires a central backend as an intermediary instance. This needs to be operated, maintained, and secured. In addition, there are licensing costs, integration effort, and ongoing operating costs.

API connection: Direct, streamlined, and efficient

While OCPP was originally developed for interoperable public infrastructures, modern APIs pursue a different approach: direct communication between device and software system.
The JUICE BOOSTER 3 air deliberately dispenses with OCPP. The mobile charging station is managed via the j+ pilot app. There, electricity tariffs can be stored, charging processes documented, and charging data exported, among other things.
For fleet applications, a powerful API is also available. It enables the direct, automated, and secure transfer of all charging data into existing ERP, fleet, or billing solutions.
The decisive difference: No additional OCPP backend is necessary.
This results in several advantages:

  • Less system complexity
  • Lower infrastructure and operating costs
  • Direct integration into existing administration software
  • Faster implementation
  • Complete data sovereignty within the company

Especially in fleet management, efficiency is paramount. Companies want to process charging information automatically without having to operate additional platforms. A modern API fulfills precisely this purpose.

Security: Fewer interfaces, less attack surface

An often underestimated aspect is IT security. OCPP relies on a central backend through which all communication flows. However, an additional system layer increases complexity as well as integration effort, and thus also the demands on operation and IT security.
Meanwhile, the API architecture for Juice's fleet solution is based on modern security mechanisms and encrypted communication. Data is transferred directly and in a controlled manner between the charging station and the company system. Since all data can be processed internally, full data sovereignty remains with the company itself.
This not only reduces dependence on external platforms but also significantly simplifies compliance and data protection requirements.

When OCPP makes sense – and when it doesn't

OCPP remains sensible where hardware from different manufacturers, public access, or multiple operators are involved. For stationary charging infrastructure like the JUICE CHARGER me 3, the standard is therefore still an important and sensible option.
However, in many corporate applications, a classic OCPP setup is not necessary at all. Especially with mobile fleet solutions, the focus is not on public charging points, but on the efficient processing of charging data.
This is precisely where a direct API connection plays to its strengths.

Conclusion: Not every charging infrastructure needs OCPP

OCPP has significantly advanced electromobility and remains relevant for many applications. But modern fleet solutions often no longer require complex backend architecture. With a direct API connection, charging and billing data can be integrated automatically, securely, and efficiently into existing systems.
The JUICE CHARGER me 3 shows how flexibly OCPP can be used in stationary operating environments. The JUICE BOOSTER 3 air, on the other hand, demonstrates that a modern API architecture is a streamlined and secure solution for fleet applications in many cases.
In short: Not the standard, but the application determines how the charging infrastructure is integrated. This, in turn, dictates the appropriate communication architecture.

JUICE CHARGER me 3

The smart wallbox for networked charging at home and in companies – product page: https://juice.world/en/collections/juice-charger-me-3

JUICE BOOSTER 3 air

The compact, smart wallbox for safe charging on the go – product page: https://juice.world/en/collections/juice-booster-3-air

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