General; Prerequisites For Backup Power Mode; Transitioning From Feeding Energy Into The Grid To Backup Power Mode; Transitioning From Backup Power Mode To Feeding Energy Into The Grid - Fronius Primo GEN24 3.6 Operating Instructions Manual

General

Prerequisites for IMPORTANT!
backup power
If several backup power variants are available, please note that only one backup
mode power variant may be installed and configured.
In order to use the inverter's backup power function, the following prerequisites
must be fulfilled:
-
-
-
-
-
-
-
Transitioning 1.
from feeding en-
ergy into the grid 2.
to backup power
mode
3.
4.
5.
Transitioning 1.
from backup 2.
power mode to
3.
feeding energy
into the grid
4.
5.
6.
7.
The inverter must support the backup power variant – Full Backup (see
chapter Function overview
A battery suitable for backup power use must be installed and configured.
Correct cabling of the backup power system in the electrical installation or
usage of a switch box from Enwitec (see chapter
Full Backup backup power changeover
page 189).
Mount and configure the Fronius Smart Meter at the feed-in point.
warning notice for the backup power supply
Attach a
us.com/en/search-page, item number: 42,0409,0275) on the electrical dis-
tributor.
Apply the necessary settings in the
"Functions and pins" → "Backup power" menu area and activate backup
power.
Follow the backup power checklist
page, item number: 42,0426,0365) step by step and confirm.
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.
The public grid fails or specific grid parameters are dropped below or ex-
ceeded.
The inverter carries out the measures necessary according to the country
standard and then switches off.
The inverter starts backup power mode after a checking period.
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.
The inverter is operating in backup power mode.
The public grid is functioning correctly again.
The Fronius Smart Meter monitors the grid parameters on the public grid
and passes this information to the inverter.
The stability of the returned public grid is determined by checking the meas-
ured values of the Fronius Smart Meter.
The inverter ends backup power mode.
All circuits are reconnected to the public grid and are supplied by the grid.
The inverter can start feeding energy into the grid again after performing the
grid checks required by the relevant standard.
on page 15).
Components for automatic
on page 163
"Devices and system components"
(https://www.fronius.com/en/search-
or Circuit diagrams on
(https://www.froni-
→
45