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4 .2 Standard Battery Charging Programs
The W4B-120C provides 8 standard battery charging algorithms (programs) that
are selected with the DIP switches. These standard algorithms are suitable for
lead-acid batteries ranging from sealed (gel, AGM, maintenance free) to flooded
to L-16 cells and Ni-cad etc.
The table below summarizes the major parameters of the standard charging algorithms.
Note that all the voltages are for 12V systems (24V = 2X, 48V = 4X)
A. Battery Type
– These are generic lead-acid and Ni-cad battery types. See Section 8.0 for
more information about battery types and appropriate battery charging.
B. BULK Voltage
–This is the PWM Absorption stage with constant voltage charging.
The “PWM voltage” is the maximum battery voltage that will be held constant. As the
battery becomes more charged, the charging current tapers down until the battery is
fully charged.
C. Float Voltage
–When the battery is fully charged, the charging voltage will be reduced to
13.4 volts for all battery types.
D. Equalization Voltage
–During an equalization cycle, the charging voltage will be held
constant at this voltage.
All values are 25ºC (77ºF) .
A
B
C
D
E
DIP
Equalize
Switches
Battery Type
Bulk
Float
Equalize
Time
(4-5-6)
Voltage
Voltage
Voltage
(hours)
off-off-off
1 – Sealed
14.0
13.4
None
-
off-off-on
2 – Sealed
14.1
13.4
14.2
1
off-on-off
3 - Sealed
14.3
13.4
14.4
2
off-on-on
4 - Flooded
14.4
13.4
15.1
3
on-off-off
5 - Flooded
14.6
13.4
15.3
3
on-off-on
6 - Flooded
14.8
13.4
15.3
3
on-on-off
7 - L-16
15.0
13.4
15.3
3
on-on-on
8-NiCad
16.0
14.5
None
-
Table 4 .2 Standard Battery Charging Programs
