Etrel Wallbox
Controls and monitors Etrel EV wallbox charging via Modbus TCP.
This template connects Etrel Inch Home and Inch Pro wallboxes to ModbusCloud via Modbus TCP. It reads charging status, per-phase voltage, current, active power, energy consumption, and session data. It also allows setting target current, phase configuration, charger time, and charger restart.
- Protocol
- Modbus TCP
- Connection
- Ethernet, Modbus TCP
- Registers
- 21, read and write
- Brand
- Etrel
- Key readings
- Charging Status · L-N Voltage L1 to L3 · Current L1 to L3 · Active Power L1 to L3 and Total · Power Factor · Session Energy and Duration
- Available commands
- Target Current · EV Max Phase Current · Charger Set Time · Charger Restart
- Compatible models
- Etrel Inch Home · Etrel Inch Pro
- Last updated
Registers (21)
19 read, 7 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| Charging Status | Read | ||||
| Measured vehicle number of phase | Read and write | ||||
| EV max phase current | A | Read and write | |||
| Target current | A | Read and write | |||
| Frequency | Hz | Read | |||
| L-N Voltage (L1) | V | Read and write | |||
| L-N Voltage (L2) | V | Read and write | |||
| L-N Voltage (L3) | V | Read | |||
| Current L1 | A | Read | |||
| Current L2 | A | Read | |||
| Current L3 | A | Read | |||
| Active Power L1 | kW | Read | |||
| Active Power L2 | kW | Read | |||
| Active Power L3 | kW | Read | |||
| Active Power Total | kW | Read | |||
| Power Factor | Read | ||||
| Total imported active energy in running session | kWh | Read | |||
| Running Session Duration | s | Read | |||
| Running Session departure time | s | Read | |||
| Charger Set time | s | Write | |||
| Charger Restart | Write |
Loading registers…
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Use cases
- Monitor real-time charging status and per-phase power consumption on a live ModbusCloud dashboard.
- Log session energy and duration data over time to generate monthly charging reports for customers.
- Set target charging current remotely to implement basic load management during peak hours.
- Create an alert when charging status changes unexpectedly or a phase voltage drops below threshold.
- Restart the charger remotely via ModbusCloud after a fault without requiring a site visit.
- Track power factor and per-phase current to identify potential wiring or load balancing issues.
Installation
Connect the ModbusCloud Gateway to the same local network as the Etrel wallbox.
Ensure Modbus TCP is enabled on the Etrel wallbox and note its IP address and Modbus TCP port.
Verify the firmware version on the Etrel wallbox, as byte order for 32-bit floating values changed in v1.0.2.
In the ModbusCloud portal, import the Etrel Wallbox template and configure the IP address and port of the wallbox.
Confirm that live readings such as charging status, voltage, and current appear correctly on the dashboard.
If readings appear incorrect, check that the template version matches the wallbox firmware version regarding byte order.
Things to watch for
Voltage or power readings appear as very large or very small incorrect numbers. What is wrong?
The register byte order for 32-bit floating point values changed in Etrel firmware v1.0.2. Ensure your wallbox firmware version and your ModbusCloud template version match. A byte order mismatch causes garbled float values.
Can I adjust the charging current remotely?
Yes. The target current and EV max phase current registers are writable. You can set these values from ModbusCloud to control the charging rate dynamically.
Which Etrel models are supported by this template?
The template is compatible with the Etrel Inch Home and Etrel Inch Pro. Both models use the same Modbus TCP register map.
The gateway cannot connect to the wallbox over Modbus TCP. What should I check?
Verify that the wallbox and the ModbusCloud gateway are on the same network or VLAN. Confirm that Modbus TCP is enabled in the wallbox settings and that the correct IP address and port are configured in the template.
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