ELAUSYS / INV-KNX-SMA
SMA KNX Gateway
The INV-KNX-SMA connects compatible SMA solar inverters to your KNX installation via Modbus TCP. Bring solar production data—and battery and grid measurements where supported—into your KNX visualisation and automation, using a local network connection without a cloud service.
The product
Designed for your installation.
Connect your SMA inverter to KNX
The Elausys INV-KNX-SMA makes inverter measurements available as KNX group objects. View solar production alongside other building information in HyperVisu or another KNX visualisation, and use the data in your energy-management logic.
The gateway communicates with the inverter over the local Ethernet network. An internet connection or cloud service is not required for this communication.
Monitor production, battery storage, and grid exchange
Access solar power output, energy yield, and electrical measurements reported by your inverter.
On supported hybrid installations, the gateway also provides battery information such as state of charge and charging or discharging power. Grid import/export power is available when the inverter exposes the required measurements from compatible metering equipment.
The available data depends on the inverter model, firmware, selected communication profile, and installation.
Use energy data in KNX automation
The gateway includes 64 configurable logic functions, including logic gates, sequences, calendar triggers, and mathematical operations.
For example, use measured grid export to enable water heating through a suitable KNX actuator, or display battery charge level on a KNX visualisation. The connected equipment and configured logic determine how the installation responds.
Measurements update at a configurable interval of 1–255 minutes.
Compatibility and installation
The gateway supports compatible models in the SMA Sunny Boy, Sunny Tripower, and Sunny Tripower Smart Energy ranges. The inverter’s Modbus TCP interface must be available and enabled.
Installation requires a KNX bus connection, Ethernet access to the inverter, and an external 12–30 VDC power supply. KNX parameters are configured in ETS5 or ETS6; network settings are configured through the gateway’s web interface.
Check the documentation for the communication profile and firmware required by your inverter.
Specifications
- Reference
- INV-KNX-SMA
- Manufacturer
- ELAUSYS
| Parameter | Specification |
|---|---|
| Product reference | INV-KNX-SMA |
| Supported inverter ranges | Compatible SMA Sunny Boy, Sunny Tripower, and Sunny Tripower Smart Energy models |
| Inverter connection | Modbus TCP over Ethernet, RJ45 |
| Communication profiles | SMA native profile; SunSpec profile for supported legacy installations |
| KNX measurements | Power, energy, voltage, current, frequency, and other available inverter measurements |
| PV monitoring | Voltage and current for up to 2 PV strings |
| Battery monitoring | Supported hybrid installations; available values depend on profile and inverter |
| Grid monitoring | Import/export power where supported; requires compatible metering equipment |
| Data polling interval | 1–255 minutes |
| Logic functions | 64 |
| AC network configuration | Single-phase or three-phase |
| External power supply | 12–30 VDC |
| KNX bus current | <16 mA at 29 VDC |
| Isolation | Galvanic isolation from the KNX bus |
| Mounting | DIN rail, 2-module width |
| Operating temperature | +5 to +45 °C |
| Configuration | ETS5 / ETS6; web interface for network settings |
Key features
- Connect compatible SMA solar inverters to KNX over Ethernet
- Monitor solar power production and energy yield
- Access battery and grid import/export data on supported installations
- Use 64 built-in logic functions for KNX automation
- Communicate locally without a cloud service or internet connection
- Configure in ETS5 or ETS6
- Compact 2-module DIN-rail housing
Documents & support
PDFInverter Gateway DatasheetProduct document · Opens in a new tabPDFQuick-Start-GuideProduct document · Opens in a new tabPDFSafety-and-Regulatory-Notice-ENProduct document · Opens in a new tabBrowse product supportFAQ
Frequently Asked Questions
Which SMA inverters are compatible?
Compatible models in the Sunny Boy, Sunny Tripower, and Sunny Tripower Smart Energy ranges are supported. Compatibility depends on the inverter’s Modbus interface and firmware. Check the documentation for your exact model before ordering.
Can I monitor a battery?
Yes, on supported hybrid installations using the SMA native communication profile. Available measurements include battery state of charge, charging or discharging power, and accumulated charge/discharge energy. Availability depends on the inverter and firmware.
Can I measure electricity imported from or exported to the grid?
Yes, where the inverter exposes the required grid-metering data through the supported SMA native profile. This requires compatible metering equipment, such as an SMA Energy Meter or Sunny Home Manager, configured within the SMA installation. The gateway reads this information from the inverter.
Can it switch appliances when surplus solar energy is available?
The gateway can provide measurements and KNX logic for this purpose. Switching or enabling the appliance requires a suitable KNX actuator or compatible control interface. Surplus-based operation also requires grid-exchange measurements and correctly configured logic.
Does it need an internet connection or Sunny Home Manager?
An internet connection is not required for communication between the gateway and inverter. A Sunny Home Manager is not required for basic inverter monitoring. Additional metering equipment is needed for grid import/export measurements.
What do I need to install it?
A KNX installation, Ethernet connectivity to a compatible SMA inverter, an external 12–30 VDC power supply, and ETS5 or ETS6 for configuration. Modbus TCP must be enabled on the inverter.