This integration is specifically for German users under the rules of EnWG Paragraph 14a, which allows grid operators to temporarily limit power consumption of controllable loads during peak periods.
This guide will help you configure your SmartgridOne Controller to integrate with the SmartMeterGateway (SMGW) for Paragraph 14a compliance in Germany.
| Device Type | Variants | Supported |
|---|---|---|
| Storage Devices | Charging Only | ⚠️ |
| EV Chargers | All | ✅ |
| Heatpumps | ||
| Cooling Devices | ❌ |
The Paragraph 14a integration enables your system to respond to grid management signals from your distribution system operator (DSO). When the grid is under strain, your SmartMeterGateway will send a signal to your SmartgridOne Controller, which will temporarily limit the power consumption of connected devices to 4.2kW by default.
The setup consists of two main parts:
Log in to the commissioning interface.
Go to the "Devices" tab and click "Start device wizard".
Based on your controller type, follow one of these paths:
For Standard Controllers:
For Lite Controllers:
Complete the device wizard by following the on-screen prompts:
For detailed instructions on adding a device, see our Adding a Device guide.
Navigate to and select "Paragraph 14a" from the available external signals.
Configure the Paragraph 14a integration:
Complete the wizard by clicking "Save" or "Finish".
You should now see the Paragraph 14a signal added to your external signals list.
The §14a formula is used to calculate the allowed grid import limit for all controllable devices. The limit differs based on the number of devices, and it can be affected by total nominal power per device type.
When a §14a signal is received:
External Signal Priority The §14a signal has priority over local control modes and external signals. When active, it will limit power to controllables and then the local moode will have effect.
Direct control is not implemented, as this allows the grid operator to send device-specific setpoints (or limits). This does not require the use of an EMS.
EMS Control is enforced by calculating the consumption limit for all controllable devices on each individual location. The overall limit is dependent on the type an number of devices behind the grid meter.
The following formula is used to determine the limit per site:
If the sum of the grid connection power of heatpumps or coolers is larger than 11kW, we use the following formula:
The number of devices is counted as follows:
The simultaneity factor is determined using the following table.
| Number of Devices | GZF |
|---|---|
| 1 | 1 |
| 2 | 0.8 |
| 3 | 0.75 |
| 4 | 0.7 |
| 5 | 0.65 |
| 6 | 0.6 |
| 7 | 0.55 |
| 8 | 0.5 |
| 9+ | 0.45 |
In addition to the controllable consumption limit, the following formula is used to set the overall grid limit, to compensate for production power:
An installation with five heatpumps of 2kW each is activated, and three batteries of 2kW.
An installation with five heatpumps of 3kW each, an EV charger of 10kW and a battery of 7kW is activated.
An installation with five heatpumps of 3kW each is activated, and PV is producing 2kW.
The controllable consumption limit is 8kW, and the net limit is 6kW.
An installation with five heatpumps of 3kW each is activated, there is 4kW uncontrollable load and PV is producing 2kW.
The controllable consumption limit is 6kW, and the net limit is 8kW.
An installation with five heatpumps of 3kW each is activated, there is 2kW uncontrollable load and PV is producing 4kW.
The controllable consumption limit is 8kW, and the net limit is 4kW (we are taking 6kW from the grid for controllable loads and injecting 2kW).