Having an actual case, I found it weird that I could not get any information that my system is currently running in emergency-power mode.
No combination of states and errors or sensor values seem to indicate that there is "no working mains connection" available and the entire system is running forced autonomous mode, either on PV, battery or a combination.
The Fronius solar.web app however does report this specifically, so I suspect there is a sensor that allows reading that state.
There is a Backup Controller 3PN-35A installed that does the automatic fail over switching which might get queried for that.
Having an actual case, I found it weird that I could not get any information that my system is currently running in emergency-power mode.
No combination of states and errors or sensor values seem to indicate that there is "no working mains connection" available and the entire system is running forced autonomous mode, either on PV, battery or a combination.
The Fronius solar.web app however does report this specifically, so I suspect there is a sensor that allows reading that state.
There is a Backup Controller 3PN-35A installed that does the automatic fail over switching which might get queried for that.