Figure 9 Repeated Charging - Outback FXR2012A Operator's Manual

Cycle 3
AC Loss
Bulk
Absorption
Set Point
Float
Set Point
Re-Bulk
Set Point
Absorption Absorption
timer resets
timer runs
Inverter now charging to a new set point
Inverter has reached the charging set point

Figure 9 Repeated Charging (3


Prior to the beginning of Cycle 3, the AC source was lost. The battery voltage decreased below the level of
the Re-Bulk set point. Whenever this occurs, the Absorption timer resets to its maximum amount.

In Figure 9, Cycle 3 begins when the AC source is restored again. The charger begins a new cycle by
entering Bulk stage. When it enters Absorption, the timer runs until it is interrupted by a loss of AC power.

Following Cycle 3, the voltage does not decrease below Re-Bulk. The Absorption timer retains the
remaining time from Cycle 3.

Cycle 4 begins when the AC source is restored again. The charger enters Bulk stage and proceeds to
Absorption. This stage does not last for the full duration of the Absorb Time setting. The timer uses up the
remaining time from Cycle 3. Absorption ends when the timer expires.
In this example, the duration was also longer than the Float Time setting. Because the Float timer began
running near the beginning of Cycle 3 and also Cycle 4 (when the batteries exceeded the Float Voltage
setting), the Float Time has also expired. The charger does not enter Refloat or Float and goes Silent.
During the Silent period, AC is lost again. The battery voltage decreases until it reaches the Re-Bulk set
point, prompting a new charge cycle. The Absorption timer resets to its maximum amount.

When Cycle 5 begins, the charger proceeds through the Bulk stage and then the Absorption stage. At the
end of Cycle 5, the Float Time has expired, so the charger goes Silent.
900-0167-01-00 Rev A
AC Loss
Abs.
Bulk
(part) (remaining time)
Inverter completed charging; the previous set point is no longer in use
Inverter waiting to charge when AC restored; the previous set point is still in use
Inverter waiting to charge when AC restored; a new set point is in use
Cycle 4
AC Loss
Absorption Silent
Absorption
Absorption
timer runs
timer
resets
rd th
, 4 , and 5
Operation
Cycle 5
Bulk Absorption
Absorption
timer runs
(complete)
th
Cycles)
Silent
39