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Charging Current Setting: Bulk Stage (bUL), Absorption to Float Stage (AbS)
Model
24V 3000W
50A, 40A, 30A, 20A, 10A (Default: 50A)
24V 2000W
40A, 30A, 20A, 10A, 5A (Default: 40A)
• Consult the battery manufacturer when choosing the Bulk Stage charging current of the battery bank. For a
sealed lead acid battery, the rule of thumb for the maximum charging current is 1/5 of battery capacity.
• The Absorption to Float stage current determines the transition from Absorption stage to Float stage. If an
external DC load is connected to the battery bank, a higher current setting is recommended to compensate for
the extra current drawn from the external DC load.
• In order to avoid the tripping of the external AC Source Branch Breaker, when high powered AC loads are
connected to the AC Output, the charging current will automatically be reduced so that the total AC Input
current (AC Output Current + AC Charger Current) is maintained below the set values of the AC Input Circuit
Breaker (Cbr). See more details in AC Source Circuit Breaker Function.
Note: When the battery charging process starts, the unit will first measure the battery voltage, if it senses the battery
voltage is below 19V, the charger current is automatically reduced to < 12.5A. It will resume back to the set charger
current when the battery is charge to above 19V for 15 minutes. See more details on section Understanding on Unit
Error code (E01 and E11).
Battery Temperature Setting 'bTM' (voltage adjustment from 25°C setting)
No Battery Temperature Sensor (BTS) installed
There are three settings (Low, Normal, High) available for battery temperature setting.
• Setting to 'Low' temperature will compensate the charging voltage by +1.35 on GEL and Flooded battery
type and +1.05V on AGM battery type.
• Setting to 'Nor' will have no change to the selected charging voltage.
Setting to 'HI' temperature will compensate the charging voltage by -0.54V on GEL and Flooded battery
type and -0.42V on AGM battery type.
Optional Battery Temperature Sensor (BTS) Installed
• If the temperature measured by the BTS is below 25°C, the charging voltage will be compensated with
+0.054V per °C on GEL and Flooded battery or +0.042V per °C on AGM battery.
• If the temperature measured by the BTS is above 25°C, the charging voltage will be compensated with
-0.054V per °C on GEL and Flooded battery or -0.042V per °C on AGM battery.
There is no voltage adjustment compensation when battery type of Lithium, Program or Power Supply is selected.
Flooded Battery Equalization Setting:
Equalization setting can only be set on Flooded batteries. Before the equalization begins, the unit will automatically
fully charge the battery first, followed by one hour of equalization. Consult and follow the instruction provided
by the battery manufacturer when performing the equalization process.
• Select 'Eq' under 'Bulk/Absorption Voltage' (AbS Voltage) setting.
• The unit will start a full flooded battery charging cycle first before the Equalization begins. The Equalization
Voltage is set to 31.6V and current is limited to 1/10 of the set Bulk Stage Charging Current.
• Display will show 'Equ' and the battery voltage during the Equalization period.
• The unit cannot determine when to terminate the equalization of the battery. A one-hour timeout is set as
a safety feature and requires the user to continually re-activate it as necessary after checking the batteries
manually.
• To terminate the Equalization process, change and save the battery type to other types like AGM, GEL etc.
and then change and save it back to the Flooded type battery.
WhisperPower Inverter / Battery Charger
Bulk Stage
Absorption to Float Stage
8A, 6A, 5A, 3A, 2A (Default: 5A)
6A, 5A, 4A, 3A, 2A (Default: 4A)
25
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