TriStar MPPT 600V Installation & Operation Manual

45TriStar MPPT 600V Operator’s Manual
Float Cancel Voltage
1:00 2:00 3:00 4:00 5:00 6:00
46.00 V
Bulk
Absorption
Float Cancel Voltage
time (hrs)
Float cancelled this charge cycle
Figure4-5.Floatcancelledchargingprole
If the battery bank discharges below 46.00 Volts the previous night, Float charging stage will be
cancelled for the next charge cycle. Figure 4-5 above illustrates this concept. At 0:00 hrs (dawn),
battery voltage is below the Float Cancel threshold voltage. The diagram shows where Float
stage would have occurred if Float was not cancelled.
Equalize Time-Out
1:00 2:00 3:00 4:00 5:00 6:00
Absorp. V
Bulk
Float
Equalize
Equalize timeout
time (hrs)
Equalize V
    Figure4-6.Equalizetime-outchargingprole
Thechargingproleingure4-6showsanEqualize Time-out event. The time-out timer begins
assoonasbatteryvoltageexceedstheAbsorptionvoltageset-point.Ifthereisinsufcientcharg-
ing current or system loads are too large, the battery voltage may not reach the Equalize set-
point. Equalize Time-out is a safety feature that prevents high battery voltage for extended peri-
ods of time which may damage the battery.