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6.1.2 Battery Operation / Autonomy Operation
The mains is not within the required tolerance range or has
failed. In this case power is supplied to the inverter from the
charged battery without interruption. The power supply to the
loads is therefore also ensured in the event of a mains failure.
This drains the capacity of the battery and it is discharged. This
status is signalled by the battery symbol (LED Battery) lighting
up, as well as an intermittent acoustic signal every 4 seconds
and every second before switching off. This can be suppressed
by pressing the “Alarm off” button. With decreasing battery
capacity the alarm is activated automatically. Depending on the
expansion level, age and condition of the battery and in
particular on the load to be supplied, the standby time can vary
from a few minutes to several hours.
The inverter is switched off if the battery voltage drops below
a factory-set minimum voltage value.
Never store the unit in this condition! The discharged battery
system should be recharged within a week at the latest.
When the voltage and frequency are within the tolerance
range once more, the inverter and the battery charger switch
back on automatically. The inverter then continues supplying
the inverter and the battery charger takes over charging the
battery.