MENNEKES AMTRON® 4You 300
Monitor and control MENNEKES AMTRON 4You 300 EV charging station via Modbus RTU
Template for the MENNEKES AMTRON 4You 300 EV charging station via Modbus RTU. Reads voltage, current, power, temperature, session energy, and EVSE state. Controls charging current, charging release, solar charging mode, and dynamic phase switching.
- Protocol
- Modbus RTU
- Connection
- RS485, 57600 baud
- Registers
- 55, read and write
- Brand
- MENNEKES
- Key readings
- Voltage L1 to L3 · Current L1 to L3 · Power L1 to L3 and Overall · EVSE State · Charged Energy Session and Total · Temperature
- Available commands
- Charging Current Energy Manager · Charging Release Energy Manager · Solar Charging Mode · Requested Phases
- Compatible models
- AMTRON 4You 300
- Last updated
Registers (55)
53 read, 7 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| 53_Voltage L1 | V | Read | |||
| 54_Voltage L2 | V | Read | |||
| 55_Voltage L3 | V | Read | |||
| 50_Current L1 | A | Read | |||
| 52_Current L3 | A | Read | |||
| 51_Current L2 | A | Read | |||
| 56_Power L1 | W | Read | |||
| 57_Power L2 | W | Read | |||
| 58_Power L3 | W | Read | |||
| 59_Power Overall | W | Read | |||
| 10_EVSE State | Read | ||||
| 71_Charged Energy Session | kWh | Read | |||
| 72_Duration Session | s | Read | |||
| 01_Modbus Version | Read | ||||
| 20_SignaledCurrent | A | Read | |||
| 60_Maximal EVSE Current | A | Read | |||
| 11_Authorization Status | Read | ||||
| 12_Downgrade | Read | ||||
| 13_Phase Rotation | Read | ||||
| 30_Downgrade Current | A | Read | |||
| 31_Charging Current Energy Manager | A | Read and write | |||
| 32_Max Current House (DIP) | A | Read | |||
| 33_Max Current EVSE | A | Read | |||
| 34_Phase Switching Mode | Read | ||||
| 70_Max Current Session | A | Read | |||
| 82_Cable Lock | Read | ||||
| 83_Solar Charging Mode | Read and write | ||||
| 84_Requested Phases | Read and write | ||||
| 85_Charging Release Energy Manager | Read and write | ||||
| 86_Lock EVSE | Read and write | ||||
| 90_Active Error Code | Read | ||||
| 18_CP State | Read | ||||
| 36_Phase Options HW | Read | ||||
| 37_Cable Lock | Read | ||||
| 38_Master Lost Fallback Current | Read | ||||
| 39_Grid Imbalance | Read | ||||
| 40_Grid Imbalance Threshold | A | Read | |||
| 41_Grid Phases Connected | Read | ||||
| 42_Authorization | Read | ||||
| 44_Phase Switching Pause | s | Read | |||
| 43_Solar Supported Charging Current | A | Read | |||
| 67_Temperature | °C | Read | |||
| 73_Detected EV Phases | count | Read | |||
| 91_Master Lost Fallback State | Read | ||||
| 92_Switched Phases | Read | ||||
| 100_Charged Energy Total | kWh | Read | |||
| 101_Charging Sessions Total | count | Read | |||
| 61_Phase Rotation | Read | ||||
| 62_Connected Phases | Read | ||||
| 63_Phase Usage Solar Charging | Read | ||||
| 64_Fallback Current Master Lost | A | Read | |||
| 65_Solar Charging Active | Read | ||||
| 66_Phase Switching Pause | s | Read | |||
| 80_Heartbeat 0x55AA | Write | ||||
| 87_System Restart | Write |
Loading registers…
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If a device is not in the library yet, we build the template for free as soon as we have the register data.
Use cases
- Monitor real-time charging power and session energy on a live dashboard for each customer site.
- Create an alert when EVSE state indicates a fault or when the wallbox temperature exceeds a safe threshold.
- Log cumulative charged energy per station to generate monthly consumption reports for billing.
- Control solar-optimized charging by adjusting charging current and phase switching based on PV surplus.
- Remotely enable or disable charging via the charging release register for access management.
- Track per-phase voltage and current to detect load imbalance across multiple installations.
Installation
Connect the ModbusCloud Gateway to the MENNEKES AMTRON 4You 300 RS-485 terminals using a twisted-pair cable with correct A/B polarity.
Set DIP switches 4, 5, and 7 of bank S1 on the wallbox to ON and restart the wallbox to enable solar-controlled Modbus satellite mode.
Configure the gateway serial port to match the wallbox defaults: 57600 baud, 8 data bits, 2 stop bits, Modbus address 50.
If dynamic phase switching is required, connect the MENNEKES configuration cable and enable the option in the MENNEKES configuration tool before commissioning.
Import the MENNEKES AMTRON 4You 300 template in the ModbusCloud portal and assign it to the correct gateway and Modbus address.
Verify that readings such as voltage, current, and EVSE state appear on the ModbusCloud dashboard.
Things to watch for
The wallbox does not respond to Modbus commands. What should I check?
Verify that DIP switches 4, 5, and 7 on bank S1 are set to ON and that the wallbox has been restarted afterward. Also confirm the baud rate is set to 57600 with 2 stop bits, and that the Modbus address matches (default 50).
Charging stops unexpectedly after a few seconds of external control.
The heartbeat register at address 3328 must receive the value 0x55AA at least every 10 seconds. If this cyclic write is interrupted, the wallbox reverts to standalone mode. ModbusCloud writes registers at most once per minute, so it cannot keep up this heartbeat. Controlling this wallbox through ModbusCloud is therefore not possible, while reading its values works.
Dynamic phase switching does not work even though I send the requested phases command.
Phase switching must first be activated via the MENNEKES configuration cable and configuration tool. Without this activation, the wallbox ignores phase switch requests over Modbus. This feature is only available on the 11 kW variant.
What firmware version is required for Modbus RTU support?
The wallbox firmware must be at least version 2.0 (March 2024). MENNEKES recommends using the latest version of the configuration tool (v2.2) to update firmware. The current wallbox firmware is v2.2 (July 2025).
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