TriStar MPPT 600V Installation & Operation Manual

44
Operation
Absorption Extension
1:00 2:00 3:00 4:00 5:00 6:00
50.00 V
Bulk
Extended
Absorption
FloatAbsorption
Absorption Extension Voltage
time (hrs)
Figure4-3.Absorptionextensionchargingprole.
If battery voltage discharges below 50.00 Volts the previous night, Absorption charging will be
extendedonthenextchargecycleasshowningure4-3above.30minuteswillbeaddedtothe
normal Absorption duration.
Float Time-Out
1:00 2:00 3:00 4:00 5:00 6:00
Float V
Bulk
Float
Sub-
Float
Absorption
Absorption
60 mins.
below Float
time (hrs)
Bulk
    Figure4-4.Floatexittime-outchargingprole
After entering Float stage, the controller will only exit Float if the battery voltage remains below
Floatvoltagefor60cumulativeminutes.Ingure4-4,asystemloadturnsonat4:00hrswhen
the controller is in Float stage, runs for one hour, and turns off at 5:00 hrs. The load current draw
is larger than the charge current, causing battery voltage to drop below Float voltage for 60 min-
utes. After the load turns off, the controller returns to Bulk charging and then Absorption stage
onceagain.Inthisexample,aloadrunscontinuouslyfor60min.However,becausetheFloat
exit timer is cumulative, multiple momentary load events that pull the battery voltage below Float
voltage for a combined 60 minutes duration will also force an exit from the Float stage.