> For the complete documentation index, see [llms.txt](https://docs.voltmasters.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.voltmasters.io/device-integrations/ev-chargers/sinexcel-dc-charger.md).

# Sinexcel DC Charger

Our EMS integrates with the Sinexcel DC charger range over Modbus-TCP. The integration allows charging sessions to be monitored and the charging power to be managed for use cases such as smart charging and load balancing.

{% hint style="info" %}
This manual assumes the charger has already been physically installed and commissioned. After these steps, the charger is ready for connection to our EMS.
{% endhint %}

### Supported devices

We support the Sinexcel DC charger range, addressed through a single Modbus-TCP integration:

* **CE 160 kW**
* **CE 240 kW**
* **UL 240 kW**
* **Integrated DC Charger** (compatible firmware)
* **Distributed DC Charger** (compatible firmware)

In the platform you can either select a specific model or select the series as a whole. The connection and control are identical; the charger reports its own model over Modbus.

### EMS functionality

With the current integration, our EMS enables:

* Monitoring of charging state, output power, voltage, current and metered energy per connector
* Per-connector power limiting (connector 1 and connector 2)
* Load balancing within the limit of the grid connection, together with the battery and PV
* Charging at the cheapest moments, including during negative prices

Additional functionality may be added over time as integration capabilities evolve.

{% hint style="warning" %}
Monitoring and per-connector power limiting are documented for **connector 1 and connector 2** only. Whole-charger power limiting requires a CCU version higher than `00.102.76`. Distributed chargers additionally require an M2 board firmware higher than `104.38` (boards without LAN port) or `200.36` (boards with LAN port).
{% endhint %}

## Configuring the charger

{% stepper %}
{% step %}

### Enable Modbus on the MCU

* On the charger screen, enter the password (default `080808`).
* Go to **Debug** → **Previous** → **Debug**.
* Select **Debug address 5** and enter the value **416**.
* The message **open modbus** appears on the screen.
* **Reboot the MCU** to apply the change.

{% hint style="info" %}
*Entering `416` again at the same place toggles Modbus off (**close modbus**). A reboot of the MCU is always required after enabling or disabling Modbus.*
{% endhint %}
{% endstep %}

{% step %}

### Note the IP address

* Enter the password (default `080808`) and go to **Setting** → **MCU**.
* Note the charger's IP address shown on the screen. Use a fixed IP address for the location.
* The Modbus-TCP port is **502**.
  {% endstep %}

{% step %}

### Set the model and serial number (optional)

* Go to **Setting** → **MCU** → **Feature** → **model** to set the charger model (for example `1160` for CE 160 kW, `1240` for CE 240 kW, `2240` for UL 240 kW).
* Go to **Setting** → **MCU** → **Feature** → **SN** to set the charger number.
  {% endstep %}

{% step %}

### Connect to the EMS

* Connect the charger to the same wired network (LAN) as the Voltmaster Controller, on the same subnet.
* Verify that the controller can reach the charger's IP address.
* Add the charger in the platform, selecting brand **Sinexcel** and the matching DC charger model.
  {% endstep %}
  {% endstepper %}

The charger is now successfully configured and ready for use with the EMS.

{% hint style="warning" %}
If a power limit was set over Modbus and Modbus is later disabled, the last configured power limit stays active. Before disabling Modbus, set the power limit back to the charger's nominal power to restore full power.
{% endhint %}


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