New Charging Cycle - Alpha OutBack Power Radian Series Operator's Manual

Operation
Time limit: Float Time setting. The charger will go Silent once the timer has expired (if
another stage is not still in progress.) The Float timer is reset to its maximum amount whenever
the batteries decrease to the Re-Float Voltage setting.
NOTE : The Float timer begins running any time the battery voltage exceeds the Float Voltage
set point. This usually means that it begins running during the Bulk stage, once the battery
voltage rises above that level. Often the timer will expire before the bulk and absorption
stages are complete. (This will occur if the Float Time setting is less than the total of the bulk
and absorption stages.) The charger will not enter Refloat or Float but will go directly to Silent.
The charger only spends time in Float stage if the timer is still running.
To skip this step: Decreasing the Float Time setting to zero causes the inverter to enter
Silent as soon as the absorption stage is complete. The inverter will perform neither the
constant-current Refloat nor the constant-voltage Float.
Setting Float Voltage equal to the Absorb Voltage level causes the charger to proceed
through the normal three-stage cycle, but at a single voltage.
NOTE : Setting Float Time to 24/7 causes the charger remain in Float continuously so that the
Float timer no longer applies. (The charger also skips Bulk, Absorption, and Silent.) However,
the charger can begin a single three-stage charge if the criteria are met, after which it will return
to continuous Float.
Silent
Following the expiration of the Float timer, the unit enters (or re-enters) the Silent stage. The
unit remains connected to the AC source, but the charger is inactive.
The unit will continue cycling between Float and Silent for as long as the AC source is present.

New Charging Cycle

If the AC source is lost or disconnected, the unit will return to inverting mode if enabled. The
battery voltage will begin to decrease due to loads or natural loss. When the AC source is
restored, the inverter will return to the charging cycle.
Re-Bulk
If the battery voltage decreases due to discharge, the inverter will restart the cycle as soon as
the AC source is available, beginning at Bulk stage.
Voltage Used: Re-Bulk Voltage setting. The default set point is 49.6 Vdc.
If the batteries do not decrease to the Re-Bulk point, the charger will not enter the Bulk stage
and will return to its previous stage.
Absorption Timer
Time limit: Absorb Time setting. This is reset to its maximum amount whenever the battery
voltage decreases to the Re-Bulk Voltage setting. The reset occurs immediately, regardless of
the duration spent below this voltage.
If the battery voltage does not decrease to the Re-Bulk point, the Absorb Time setting will not
reset. It will retain any remaining time from the previous cycle. The Absorption stage will only
last for the duration of the remaining time.
The remaining charging steps proceed as described on the previous pages.
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