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Charging Algorithms
C–2 445-0089-01-01
Charge Algorithms
Table C-1 summarizes the voltage and current setpoints for the charging
algorithms. These voltage setpoints are applied for a battery temperature of 20°C.
To determine the voltage setpoints at other temperatures, apply the temperature
coefficient as follows:
For example, generic gel float voltage at 50° will be
V
T
X
V
20
°
TC T
X
20
°
–
( ) ×
1000
------------------------------------------
+ =
V
50
°
13.8V
27
mV
°
C
---------
50
°
20
°
–
( ) ×
–
1000
-----------------------------------------------------
13.0V = + =
Table C-1 Charge Algorithms
Charge
Algorithm Comment Temp Coeff. Bulk / Absorption
Float
*
Equalize
Max V Max I Max V Max V
(MV/°C) (V)
(%C)
** (V) (V)
1 Generic Flooded –27 14.4 30 13.5 17.5
2 Generic Gel –27 14.2 25 13.8 ***
3 Generic AGM –21 14.3 30 13.45 ***
4 Generic PB–Ca –27 15.5 30 13.5 17.5
5 –27 14.1 25 13 17.5
6 –27 14.2 25 13.5
***
7 –30 14.5 25 13.5 17.5
8 –30 15.3 25 14.3 17.5
9 –30 14.4 30 13.5 17.5
10 –30 14.15 30 13.5 14.2
11 –27 14.4 30 13.8
***
12 –21 15.5 25 13.75 16
13 –21 14.8 25 13.6 15.5
14 –27 15 200 13.7
***
15 –21.66 14.2 12.5 13.7 16.5
16 –21.66 14 10 13.5 16.5
17 –27 16 20 13.5 17.5
18 –16 14.2 20 13.2 15.5
19 –15 14.7 200 13.5 17.5
20 –15 13.5 200 13.5 17.5
21 –27 14.6 20 13.5 17.5
*
The charger delivers maximum available current to power the DC loads: it is not limited by battery size.
**
See “Max Current (%C)” in your manual.
***
The algorithms marked *** do not permit Equalize.