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7.4. Four-stage charge algorithm
charge stage
Description
Bulk
Entered when charger is started. Constant current is applied until the gassing voltage is reached (14,4 V
resp. 28.8V, temperature compensated).
Battery safe
If, in order to quickly charge a battery, a high charge current in combination with a high absorption voltage
has been chosen, the Multi will prevent damage due to excessive gassing by automatically limiting the
rate of voltage increase once the gassing voltage has been reached. The Battery Safe period is part of
the calculated absorption time.
Absorption
A constant voltage period to fully charge the battery. The absorption time is equal to 20x bulk time or the
set maximum absorption time, whichever comes first.
Float
Float voltage is applied to keep the battery fully charged and to protect it against self-discharge.
Storage
After one day of Float charge the charger switches to storage. This is 13,2 V resp. 26,4 V (for 12 V and
24 V charger). This will limit water loss to a minimum. After an adjustable time (default = 7 days) the
charger will enter Repeated Absorption for an adjustable time (default = 1 hour).
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MultiPlus
Technical data
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