Fronius Energy Package, Operating Instructions Manual, Page: 26 / 148

Emergency power mode
Prerequisites for
emergency
power mode In order to use the hybrid inverter's emergency power function, the following
prerequisites must be fulfilled:
- Correct cabling of the emergency power system in the electrical installation
(see document "Fronius Energy Package - Examples of emergency power
switchover").
- The Fronius Smart Meter must be installed at the feed-in point and con-
figured.
- Latest firmware on the inverter - if required, perform a firmware update.
- The emergency power sticker provided with the inverter must be attached to
the electrical distributor.
- Select Alternative (emergency power) setup in the CONFIG menu on the in-
verter (see Installation Instructions).
- Change the required settings in the emergency power area in the IO mapping
menu (Fronius system monitoring web page → Settings → IO mapping →
Emergency power).
- Set the emergency power to "Auto" in the system overview (Fronius system
monitoring web page → Settings → System overview → Emergency power op-
erating mode).
If there are additional inverters in the system, these should be installed outside
of the emergency power circuit, but within that for the Fronius Smart Meter, see
Operating mode - Inverter plus battery, additional inverter and emergency
power function
on page 24 .
NOTE! Emergency power mode is not possible with the batteries from the LG
Chem ResuH series.
Transitioning
from feeding en-
ergy into the grid
to backup power
mode 1 . The public grid is monitored by the inverter's internal grid and system pro-
tection unit and by the Fronius Smart Meter connected to it.
2 . The public grid fails or specific grid parameters are dropped below or ex-
ceeded.
3 . The inverter carries out the measures necessary according to the country
standard and then switches off.
4 . The inverter starts backup power mode after a checking period.
5 . All loads in the household that are in the backup power circuit are supplied
by the battery and the PV modules. The remaining loads are not supplied
with power and are safely isolated.
Transitioning
from backup
power mode to
feeding energy
into the grid
1
.
The inverter is operating in backup power mode.
2 . The public grid is functioning correctly again.
3 . The Fronius Smart Meter monitors the grid parameters on the public grid
and passes this information to the inverter.
4 . The stability of the returned public grid is determined by checking the meas-
ured values of the Fronius Smart Meter.
5 . The inverter ends backup power mode.
6 . All circuits are reconnected to the public grid and are supplied by the grid.
7 . The inverter can start feeding energy into the grid again after performing the
grid checks required by the relevant standard.
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