Battery Charging - Xantrex FREEDOM HF 1000 Owner's Manual

Battery Charging

Battery charging is possible only when shore power is present and the
Freedom HF unit is connected to a battery (or battery bank).
The frequency of battery charging is determined by how much energy in the
battery is used up during inverting. Whenever the Freedom HF detects a
battery voltage that falls below 12.8 volts, the unit will begin charging the
battery, i.e., enter into bulk and absorption stages then settle in float stage. If
battery voltage does not reach 5 volts after 1 minute or 10 volts after
15 minutes as shown in the graph, the unit will terminate the charging
process and the error code  will show on the display screen.
Figure 4 below illustrates the three-stage charging process used to
maximize Freedom HF's charging efficiency.
24
Voltage
Bulk Absorption
Absorption V
Float V
10V
5V
5 hrs
1 min
8 hrs
15 min
Current
Bulk Absorption
Charge
Current
Maximum
Setting
Charge Current
Setting
Float
Current
Figure 4 Three-stage Charging Process
Table 3 illustrates the battery charging status as shown on the Status LED
and display screen.
NOTE:
If an external DC load is
Float connected to the
battery and it drains the
battery down to 12.8
Vdc, the charger will
start a new bulk stage.
Time
NOTE:
During the Float stage,
Float
the charger will provide
up to the maximum set
charge current to
compensate for an
external DC load on
demand.
Time
Freedom HF Owner's Guide