AC charging controllers for charging stations and home charging stations

Take a look at how versatile and flexible using CHARX control modular for various applications can be: Simply combine the alignable control modules as required. This way you can tailor the system precisely to your application – from a single home charger to a parking garage. The plug-and-play-capable modules are supplied with power via the DIN rail bus connector and are automatically detected in the local network. This significantly reduces the wiring and configuration effort.

By supporting all common communication protocols such as ISO 15118, OCPP, Modbus/TCP, MQTT, and REST, your charging points communicate in a smart and secure way with connected vehicles as well as with backend, building, and grid control systems. Convenient and dynamic load management for your charging park can be implemented in a variety of ways, e.g., through current value definition via Modbus/TCP. With the help of a WLAN USB adapter, you can use the charging controller as a WLAN client or WLAN access point, which enables the wireless use of existing interfaces and simplifies commissioning. You can configure the controller modules and control your charging park conveniently in your web browser via web-based management (WBM). Remote access and remote maintenance are also possible via OpenVPN and an MQTT bridge.

CHARX control modular meets all requirements for charging that is compliant with calibration laws. The new calibration law concept also considerably simplifies the implementation and certification of your calibration law solution: The charging controller serves as an interface between the signing energy meter (measuring capsule) and the OCPP backend. It forwards the data relevant to calibration law in OCMF format (Open Charge Metering Format), but does not process it. This eliminates the need for complex software tests on the controller, which significantly shortens the certification process. Updates to the controller software do not jeopardize the validity of the calibration law certificate, which saves you the trouble of recertification. In addition, our solution is not tied to a specific energy meter model – this allows you to design your charging solution flexibly. The OCMF-capable MID energy meters Iskra WM3M4C, Bauer BSM-WS36A, and EMH iML e-moc are currently supported. Other models can be added on request.

New EU regulations and directives are placing increasing requirements on the IT security of charging infrastructure: The Radio Equipment Directive (RED) in accordance with EN 18031 is mandatory as of August 2025. It calls for the protection of charging points with wireless connections such as RFID, WLAN, or cellular communication against unauthorized access. This affects smart and app-controlled home chargers, for example. The Cyber Resilience Act (CRA) will supplement this with comprehensive security requirements for networked devices from December 2027. Charging points are therefore considered digital products. The manufacturers of these must ensure security updates, vulnerability management, and CE marking. But don’t worry, we keep your charging controller compliant and secure with regular and free security updates to minimize the risk of cyberattacks and tampering. You build your charging station – we make sure it operates securely.

When you choose an AC charging controller from Phoenix Contact, you can rest assured that the hardware platform is of high quality, durable, and already designed for the applications of the future, including support for vehicle communication in accordance with ISO 15118. The controller software, on the other hand, is continuously being refined and adapted to changing market requirements. Functions such as vehicle-to-grid (V2G), vehicle-to-home (V2H), plug-and-charge (PnC), and OCPP 2.0.1 are retrofitted via free software updates.