> 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/pv-inverters/sma/data-manager.md).

# Data Manager

The SMA Data Manager aggregates the inverters of a plant behind a single connection. Our EMS reads the plant's combined production and applies plant-level active-power curtailment through the Data Manager instead of addressing each inverter individually.

### Supported devices

* **SMA Data Manager M** (EDMM-10)
* **SMA Data Manager M Lite** (EDMM-10.A)
* **SMA Data Manager L** (EDML-10)

### EMS functionality

* Monitoring of aggregated PV production across all connected inverters
* Plant-level active-power curtailment where supported (negative-price capping, fixed injection limit, zero injection)
* Integration of PV production into broader energy-management strategies

### Configuration

1. Connect your computer to the same LAN as the SMA Data Manager and open its IP address in a browser.
2. Log in as **Installer**.
3. Enable the **Modbus TCP server** (port 502) so the EMS can read the plant and send setpoints.
4. Make sure Modbus and grid-management mode are enabled on the aggregated inverters as well, otherwise curtailment cannot take effect.

{% hint style="info" %}
The Data Manager reports the combined production and forwards the EMS's active-power limit to its inverters. For inverters connected directly, without a Data Manager, see [Sunny Boy / Sunny Tripower](/device-integrations/pv-inverters/sma/sunny-boy-sunny-tripower.md).
{% endhint %}

{% hint style="warning" %}
Enter the plant's installed PV capacity when adding the device. The Data Manager applies the EMS limit as a percentage of that capacity, so an incorrect value leads to incorrect curtailment.
{% endhint %}


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