Xantrex Technology PH1800 - Manual (Page 52)

Specifications
A–4 975-0288-01-01
Float Stage In the Float stage, the constant voltage mode limited to 13.7 Vdc. An 8-
hour timer is started at this point.
If, during the 8-hour timer, the current rises to 6 A, the unit transitions
back to the Bulk Stage and starts over.
If the unit stays at 4A or less for the 8 hour timer, it will transition to
Standby Mode.
Standby Mode In the Standby Mode, the Charger is OFF but monitors the battery
voltage. If battery voltage drops below
12.5 Vdc, the unit will start a new
Bulk stage.
Figure A-1 Three-Stage Charging Process
Voltage
Bulk
Stage
Absorption
Stage Float Stage
Standby
(Stop Mode)
Current
Maximum
Charge
Amps
Setting
14.2 Vdc
13.7 Vdc
40 A or
10 A
4 A
12.5 Vdc
Time
4 A
12.5 Vdc
Time
6 A
If the current rises to 6A
during the Float period, the
Charger will start the whole
cycle back at the Bulk Stage.
4 hours
(Maximum)
If the voltage drops to 12.5 Vdc
while in Standby, the Charger
will start a new Bulk Stage.
8 hours
4 hours
(Maximum)
8 hours
Current
40 A or
10 A
Maximum
Charge
Amps
Setting