Outback Power Systems GFX1448E Benutzerhandbuch

900-0112-01-00 Rev B  

21

 

 

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.  If the batteries drop below the Rebulk voltage (see below), 
the inverter will restart the cycle, beginning at Bulk stage.  (See the triangle symbol 

 in Figure 6.)  

If the batteries do not drop below Rebulk, the charger will not enter the Bulk stage and will return to 
its previous stage. 

When entering the second stage, Absorption, the charger will not necessarily run through its full 
duration.  The timer will count down whatever time remains from the previous cycle, or whatever time 
it has accumulated since then.   

The Absorption timer does not reset to its maximum like the Float timer does.  Instead, the timer 
counts upward (gaining time) whenever the battery voltage drops below the Rebulk point.  This 
means that the Absorption period may not always be the same, depending on how much time it 
has acquired. 

In a 12-volt system, the Rebulk voltage is 12.2 Vdc.  (All voltages in this section are given for a 12-volt 
system.)  This is a fixed setting and cannot be changed.  For as long as the inverter remains below this 
voltage, the Absorption timer will gain an equal amount of time.  This dictates the duration of the 
Absorption stage.  Note that in

 

Figure 6 the duration of time spent below the Rebulk voltage is the 

same as the subsequent Absorption period  (as shown by the small arrows). 

If the battery voltage drops below 12.0 Vdc (in a 12-volt system), the timer increments (counts 
upward) at double the normal rate.  For example, if the batteries spent 8 minutes below this voltage, 
16 minutes would be added to the Absorption timer.  Similarly, if the battery voltage drops below 
11.8 Vdc (in a 12-volt system), the timer increments at quadruple the normal rate. 

The Absorption timer continues this behavior even if the charger is still on.  For example, if the charger 
is in Float stage and there is a significant battery drain, the charger may not be able to maintain the 
batteries at the Float voltage.  Once the batteries fall below the Rebulk point, the Absorption timer will 
begin accumulating time.  (However, the accumulation will be minor, as this will also cause the 
charger to re-enter the Bulk stage.) 

The timer will stop incrementing when it reaches the absorb time limit or Absorb Time setting.  This is 
the maximum duration of the Absorption stage.  This means that regardless of the voltage, the timer 

Absorption Set Point 

Sell RE Set Point 

Float Set Point 

Refloat Set Point 

Rebulk Point