User Manual
Functions
Page 15 of 22
Charging with constant voltage (U
1
phase, green LED flashes slowly)
In this phase the battery is fully charged. The voltage is kept constant at a
value of 14.4 V (standard value). As the charge of the battery increases, the
current decreases continuously and approaches a lower limit which
depends on the type and size of the battery. As soon as the value falls
below this or a safety time is exceeded, the charger switches to phase 3.
Charge retention with reduced voltage (U
2
phase, green LED illuminates)
In this phase, the charging voltage is reduced to 13.5 V (standard value) in
order to maintain the battery charge and counteract self-discharge. In this
phase, additionally connected consumers are supplied via the charger
without placing strain on the battery.
Load Reduction
The charger integrated in the G3 Combi automatically limits the charging
current when the total load (charging and output power) exceeds the rated
power.
Charging Current Limit
The charging current limit is pre-set at the factory according to
customer wishes.
The maximum charging current can be set using the potentiometer on the
top of the device. The table shows the recommended charging current in
relation to the battery capacity.
Charging
current
Capacity
15 A
75 Ah … 150 Ah
20 A
100 Ah … 200 Ah
25 A
100 Ah … 250 Ah
30 A
150 Ah … 300 Ah
40 A
200 Ah … 400 Ah
50 A
250 Ah … 500 Ah
60 A
300 Ah … 600 Ah
80 A
400 Ah … 800 Ah
120 A
600 Ah … 1200 Ah
