Victron energy MultiPlus 800VA 48/800/9 Manuel page 115

APPENDIX C: charge algorithm
120%
100%
80%
Amps 60%
40%
20%
0%
Volts
64 32 16
64 32
15
60 30
60 30
14
56 28
56 28
13
52 26
52 26
12
48 24
44 22 11
48 24
40 20
10
Bulk
4-stage charging:
Bulk: Entered when charger is started. Constant current is applied until the gassing voltage is reached (14.4V 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 13,2V resp. 26,4V (for 12V and 24V
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).
Charge current
Charge voltage
Battery Safe
mode
20 x Bulk-hours or
Max. Absorption time
Absorption 1 day
Float
7 days:
7 days
Storage
1 hour Repeated Absorption
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Time
Time