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16
Charging Logic
Alternator Type
Cut-in Cut-off
Starting Battery Voltage
Smart Alternator
Traditional Alternator
＞13.2V, for 15 seconds ＜12.7V
＞12.0V, for 15 seconds ＜11.5V
Connect alternator with starting battery and service battery (No solar panel, or night time)1.
The DCDC battery charger will connect or disconnect the service battery according to
the starting battery voltage.
1.1
The DCDC will stop charging if the alternator input voltage is higher than 16.5V, and
recover to charge when the voltage is lower than 15.5V.
1.2
The maximum alternator charging for the DCDC30 is 30A and the DCDC50 is 50A. 1.3
The solar input charges the service battery as priority. If the service battery voltage is
lower than the boost voltage setting, solar panel will only charge the service battery.
2.1
Solar charging will be triggered if the PV input voltage is higher than 15V for 10 seconds.2.4
The maximum solar charging for the DCDC30 is 30A and the DCDC50 is 50A. 2.6
After charging the starting battery for 1 minute, it will disconnect for 30 seconds and
check the starting battery voltage. It will continue to charge starting battery if the voltage
is lower than 12.7V and will stop charging if the voltage is higher than 13.2V.
2.3
If the service battery is in float charge stage, the starting battery will be charged at the same
time. The charging voltage is limited at 13.8V. The charging amperage is limited at 25A.
2.2
The DCDC will always take as much power from the solar panel as it can before
supplementing that power from alternator input, up to the rated charging current.
3.1
If the MPPT charging current from solar input is not able to keep the service battery at
constant voltage charge stage, alternator will cut in to charge the service battery. In
this case, the maximum dual input charging will be limited to 50% from each source.
3.3
If the solar input power is able to keep the service battery at constant voltage charge
stage, alternator wouldn’t charge the service battery.
3.2
The DCDC will stop charging if the PV input voltage is higher than 25.5V, and recover
to charge when the voltage is lower than 24.5V.
2.5
Connect solar panel, starting battery and service battery (Engine not running).
2.
Connect solar panel, alternator with starting battery and service battery.3.
Solar Panel Input
Dual Input (Alternator/Solar)
Alternator Input
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