The new calibration-law-compliant wallbox: The DaheimLader Business PRO
- DaheimLaden
- 3 days ago
- 4 min read
As demand for public charging infrastructure continues to grow, requirements for secure and reliable billing, connectivity, and future readiness are increasing as well.
The calibration-law-compliant DaheimLader Business PRO EV charger was developed specifically for these use cases — a professional AC charging solution that meets the highest accuracy requirements of the German Measurement and Calibration Act, making it suitable for public locations as well as businesses, commercial sites, fleets, and residential complexes. The key highlights of the DaheimLader Business PRO EV charger are:
Full system compliance with German calibration law (Eichrecht)
BiDi Ready: Thanks to the integrated PLC module, the requirements of ISO 15118-20 are fulfilled – the EV charger is therefore prepared for bidirectional charging
OCPP backend included: No monthly base fees – benefit from simple payment options, roaming integration, and monitoring
Calibration law compliance: Legally secure billing in public charging
The calibration-law compliance of the DaheimLader Business PRO ensures that the energy delivered during charging can be legally measured and billed.
Whenever electricity is supplied to or sold to third parties, the requirements of the German Measurement and Calibration Act apply. The calibration-law-compliant electricity meter integrated in the DaheimLader Business PRO, together with the compliance of the entire system, ensures precise, tamper-proof, and transparent recording of charging sessions for the user.
Through the tamper-proof processing of measurement data, the EV charger provides the necessary legal basis for transparent billing models, integration into roaming and payment systems, and the economically scalable operation of professional charging infrastructure.
PLC Module & ISO 15118-20: Prepared for the AFIR regulation and bidirectional charging
The DaheimLader Business PRO EV charger meets the requirements of ISO 15118-20, an international standard that defines standardized and secure communication between electric vehicles and charging infrastructure, forming the foundation for the next generation of intelligent charging.
For operators of public charging infrastructure, compliance with this standard is increasingly becoming the norm and – also in the context of the European AFIR regulation (Alternative Fuels Infrastructure Regulation) – is expected to become a mandatory standard for public AC and DC charging points in the future.
The standard forms the technical foundation for features such as:
Plug & Charge: Enables the automatic start of a charging session immediately after connecting the charging cable, without the need for an RFID card or app, as the vehicle authenticates itself via encrypted certificates.
Bidirectional charging (V2H/V2G): ISO 15118-20 is the key prerequisite for future applications such as bidirectional charging (Vehicle-to-Grid or Vehicle-to-Home) and prepares charging infrastructure today for upcoming energy system requirements.
PLC communication: Enables comprehensive and secure data exchange between the vehicle, the charging point, and the backend. The DaheimLader Business PRO EV charger includes an integrated PLC module, enabling standards-compliant, encrypted communication.
Roaming capability: Optionally visible in charging apps and accessible to all users
The calibration-law-compliant EV charger can be integrated into roaming networks and, if desired, displayed in charging apps. This turns a charging point into publicly accessible infrastructure without the need to develop your own app or backend solution. For this purpose, you can use our Click2Charge backend without any subscription fees.
Operators benefit from:
Multiple payment methods: credit card, Apple Pay, Google Pay, roaming fleet cards
Automated user billing and invoicing
Flexible pricing options, including the ability to implement dynamic electricity pricing
Payouts directly to the operator’s bank account
Monitoring of charging stations
and much more.
Cybersecurity and connectivity: Developed for professional IT environments
Especially in commercial applications, IT and data security are crucial factors. The calibration-law-compliant DaheimLader Business PRO EV charger was therefore developed from the ground up with a hardened software and communication architecture and meets the current European cybersecurity requirements according to EN 18031 (RED Directive). Certification of the cybersecurity requirements was carried out by TÜV Rheinland.
The security architecture protects both the charging infrastructure and connected corporate networks from unauthorized access, manipulation, and data misuse.
Key security features include:
Protected communication interfaces with encrypted data transmission to backend systems
Protection against unauthorized remote control and manipulation of charging parameters
Secure firmware update mechanisms for long-term cyber resilience
Privacy-compliant processing of charging and usage data in accordance with current EU regulations
Network hardening to prevent the EV charger from being used as an entry point into corporate IT systems
Powerful and robust in everyday operation
As with all DaheimLader products, the Business PRO EV charger is designed with high-quality and durable construction. The technical specifications clearly show that the Business PRO has been consistently developed for professional use:
Hardened glass front & metal housing
Up to 22 kW charging power (32 A)
Type 2 charging socket for connecting your own charging cable
Three-phase connection with the innovative DaheimLader DockingStation
IP65 protection rating for indoor and outdoor use
Operating temperature from −30 °C to +55 °C
Integrated residual current detection (AC 30 mA / DC 6 mA)
Functions such as PV surplus charging and cloud-based load management can also be integrated.
Easy installation thanks to the DaheimLader DockingStation
A special installation concept is the DockingStation: after the electrical installation is completed, the EV charger is simply mounted onto the docking station – one click is all it takes.
This simplifies:
Installation and maintenance
Replacement or servicing
Scalable rollouts across multiple charging points
Conclusion: The DaheimLader Business PRO is the calibration-law-compliant EV charger for public charging locations
The DaheimLader Business PRO combines:
Calibration-law-compliant energy measurement
Roaming integration
Flexible payment models
Modern cybersecurity architecture
ISO 15118-20 readiness for AFIR and bidirectional charging
Comprehensive backend and system integration without subscription fees
This makes it the ideal solution for anyone who wants to build an economically viable charging infrastructure today – without the need for costly upgrades tomorrow.
