Installation Manual

ChargeMaster Plus 12/75-3, 12/100-3, 24/40-3, 24/60-3 – User and Installation Manual
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5.4.1 Charge voltages
Bulk
Absorption
Float
AGM or
GEL
14.25 /
28.5
14.25 /
28.5
13.80 /
27.6
Flooded
14.25 /
28.5
14.25 /
28.5
13.25 /
26.5
Lithium-ion
14.25 /
28.5
14.25 /
28.5
13.50 /
27.0
5.4.2 Pre-float
The ChargeMaster Plus can automatically switch
each individual output from absorption to pre-
float stage. Pre-float ensures batteries that are
nearly full don’t receive the higher charge
voltage needed in the absorption stage. This
prevents over-charging, extending the lifespan of
the batteries.
5.4.3 Temperature compensated charging
By installing the battery temperature sensor, the
charge voltages are automatically adapted for
deviating temperatures.
Charge voltage (V)
Battery temperature (°C)
Figure 7: Temperature compensated charging
When the battery temperature is low, the charge
voltage increases. On the other hand, when the
battery temperature is high, the charge voltage
is decreased. Overcharge and gassing are
prevented this way. This will extend the life of
your batteries.
5.4.4 Flat battery support
The ChargeMaster Plus automatically detects a
flat battery and will initiate the flat battery charge
curve described in the following table.
UBat
Voltage
Output power
12V
24V
0.00V – 2.50V
0.00V – 5.00V
15%-30% of I
max
12V
24V
2.50V – 8.00V
5.00V – 16.00V
25% of I
max
12V
24V
8.00V – 10.00V
16.00V – 20.00V
linear from 25% -
100% of I
max
12V
24V
10.00V – 14.25V
20.00V – 28.50V
100% of I
max
12V
24V
>14.25
>28.50
Limited by P
max