Battery Charging - Xantrex Freedom HF 1000 Owner's Manual

Battery Charging

Voltage
Absorption
Voltage
Float Voltage
10V
5V
1 min
15 min
Current
Charge Current
Setting
Maximum
Charge Current
Setting
Float Current
Figure 4-1 Three-stage Charging Process
975-0390-01-01
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
a battery voltage that falls below 12.8 Vdc, 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 Vdc after 1 minute or 10 Vdc
after 15 minutes as shown in the graph, the unit will terminate the
charging process and the error code E12 will show on the display screen.
Figure 4-1 below illustrates the three-stage charging process used to
maximize Freedom
Bulk Stage Absorption Stage
5 hrs Max
8 hrs Max
Bulk Stage Absorption Stage
HF's charging efficiency.
Float Stage
Float Stage
Battery Charging
Freedom HF detects
NOTE:
If an external DC load is
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,
the charger will provide
up to the maximum set
charge current to
compensate for an
external DC load on
demand.
Time
4–11