Fronius Energy Package, Operating Instructions Manual, Page: 27 / 148

Restrictions in
backup power
mode In backup power mode, some electrical appliances cannot function properly as
the starting currents are too high (e.g. fridges and freezers). It is recommended
to switch off non-essential loads during backup power mode.
Switching from grid-connected operation to backup power mode takes a little
while. For this reason, the battery system with backup power function cannot be
used as an uninterruptible power supply, for example for computers.
If no energy is available from the battery or the PV modules during backup
power mode, this mode is automatically ended, irrespective of whether power is
available from the public grid or not.
Fronius Solar Battery: If sufficient energy becomes available from the PV mod-
ules once again, backup power mode starts again automatically.
BYD Battery-Box Premium: The system must be restarted manually as soon as
sufficient energy from the PV modules or the public grid is available again. For
the correct power-up sequence, see chapter
BYD Battery-Box Premium on page
34 .
If consumption is too high, backup power mode is interrupted and status code
"143 - Backup power overload" appears. The maximum power in backup power
mode according to the technical data must be observed!
Backup power
and energy sav-
ing mode If the inverter is operating in backup power mode, energy saving mode is auto-
matically active. Under the following conditions, the battery and the inverter are
switched to energy saving mode after a waiting time of 8 - 12 minutes:
- The battery is discharged to the minimum state of charge and no energy is
coming from the PV modules.
- The inverter is in an error state that is not acknowledged automatically (e.g.
multiple overload).
- The inverter is set to energy saving mode (standby mode) using the display
setting.
If the battery and inverter are in energy saving mode, the system is reactivated
by the following actions (applies only for Fronius Solar Battery):
- Enough energy is available from the PV modules.
- The public grid is functioning again.
- The battery's POWER switch is switched off and on.
More information on energy saving mode can be found in chapter Energy saving
mode on page 29
Fronius Ohmpi-
lot and backup
power mode The Fronius Ohmpilot is not suitable for backup power mode. If a Fronius Ohmpi-
lot is used, it should be installed outside of the backup power circuit (see
Oper-
ating mode - Inverter plus battery, Ohmpilot and emergency power function on
page 23 ).
NOTE!
Risk from an active Ohmpilot in backup power mode.
This may result in loss of the backup power supply.
▶
Never turn on boost mode on the Ohmpilot.
▶
Switch off the automatic circuit breaker on the Fronius Ohmpilot (if fitted).
▶
Before a power outage occurs, any function that would exceed the power
limits in backup power mode must be disabled.
27
EN