Fronius
The Fronius integration polls a Fronius
Prerequisites
You should either set a static IP or assign a static DHCP lease for the Fronius device, or alternatively access it through the local DNS name if your network is configured accordingly. For Gen24 devices (delivered with Firmware >= 1.14.1) make sure to activate “Solar API” in the inverters web interface.
Configuration
To add the Fronius integration to your Home Assistant instance, use this My button:
Fronius can be auto-discovered by Home Assistant. If an instance was found, it will be shown as Discovered. You can then set it up right away.
Manual configuration steps
If it wasn’t discovered automatically, don’t worry! You can set up a manual integration entry:
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Browse to your Home Assistant instance.
-
In the bottom right corner, select the
Add Integration button. -
From the list, select Fronius.
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Follow the instructions on screen to complete the setup.
Monitored data
Each device adds a set of sensors to Home Assistant.
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SolarNet device
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Logger information
General information about the Fronius Datalogger. Not available on “Gen24” devices. Updated every hour.
- Serial number, software and hardware platforms
- Current price of energy consumed and returned to grid and the CO₂ factor as set in the Dataloggers settings
-
Power flow
Cumulative data of the SolarNet system. Updated every 10 seconds.
- Energy produced on the current day, year and total produced energy
- Power fed to the grid (if positive) or consumed from the grid (if negative)
- Power load as a generator (if positive) or consumer (if negative)
- Battery charging power (if positive) or discharging power (if negative) and information about backup or standby mode
- Photovoltaic production
- Current relative self-consumption of produced energy
- Current relative autonomy
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Inverter
Energy produced on the current day, year and total produced energy, power, current, voltage, frequency and status for an individual inverter. Updated every minute.
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Meter
Detailed information about power, current and voltage, if supported split among the phases. Updated every minute.
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Ohmpilot
Detailed information about energy, power, and temperature of your Ohmpilots. Updated every minute.
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Storage
Detailed information about current, voltage, state, cycle count, capacity and more about installed batteries. Updated every minute.
Note that some data (like photovoltaic production) is only provided by the Fronius device when non-zero. When the integration is added at night, there might be no sensors added providing photovoltaic related data. Entities will be added on sunrise, when the Fronius devices begin to provide more data.
When an endpoint is not responding correctly the update interval will increase to 10 minutes (3 minutes for power flow) until valid data is received again. This reduces the amount of requests to Fronius devices using night mode (shutdown when no PV power is produced).
Energy dashboard
- For “Solar production”:
- If no battery is connected to an inverter: Add each inverters
Energy total
entity. - If a battery is connected to an inverter: Use Riemann sum over
Power photovoltaics
entity (from yourSolarNet
device).
- If no battery is connected to an inverter: Add each inverters
-
“Battery systems” energy values aren’t supported directly by the API. Use Riemann sum to integrate
Power battery charge
andPower battery discharge
into energy values (kWh). - For “Devices” use the Ohmpilots
Energy consumed
entity.
The energy meter integrated with Fronius devices can be installed (and configured) in two different installation positions: “feed in path” (grid interconnection point) or “consumption path”.
Feed in path meter
Recommended energy dashboard configuration for meter location in feed in path:
- For “Grid consumption” use the meters
Energy real consumed
entity. - For “Return to grid” use the meters
Energy real produced
entity.
Consumption path meter
Recommended energy dashboard configuration for meter location in consumption path:
- Use Riemann sum to integrate
Power grid import
andPower grid export
entities into energy values (kWh). - Use these energy entities for
Grid consumption
andReturn to grid
in the energy dashboard configuration.
Note
Fronius often provides firmware updates for the datamanager interfaces and the devices in their system, it’s recommended to check and apply them regularly. This integration relies on functionality present in rather recent firmware.