OutBack Power FXR2012A - Figure 6 Repeated Charging (1 St and 2 Nd Cycles)

Operation
34 900-0167-01-01 Rev A
Figure 6 Repeated Charging (1
st
and 2
nd
Cycles)
Example of Multiple Cycles

In Figure 6 (Cycle 1), the charger initially completes Absorption. When the Absorption timer expires,
the cha
rger goes Silent until battery voltage decreases to the
Re-Float
setting. The Float time
r is
reset to its maximum. The
charger proceeds through Refloat and Float until it is interrupted by
a loss
of AC powe
r.

Cycle 2 begins when the AC source is restored. During the AC loss, the battery voltage did not
decrea
se to the
Re-Float
setting, so
Float Time
retains the remainder of the previous cycle.
The
cha
rger returns to Refloat and proceeds through the Float stage. Cycle 2 completes the Floa
t stage
whe
n its timer expires. It then goes Sile
nt.
Note that in Cycle 1,
Abso
rb Time
had expired. It was not reset afterward and retained a “rem
aining
run time” of
zero. The Bulk and Absorb stages do not occur on subsequent cycl
es until the timer
read
s something other than
zero.

This graph is continued in Figure 7. During the Silent period AC is lost again. The battery voltage
decrea
ses until it reaches the Re-Bulk set point. This causes the charger to prepare a new three-
stage cycle from the beginning, but it cannot do so until the AC source is restored
.
Voltage
Absorption
Set Poin
t
Float
Set Point
Re-Float
Set Point
Time
AC Loss
Absorption
tim
e
r r
u
n
s
Cycle 1
Cycle 2
Float timer
r
ese
t
s
Float timer runs
(pa
rt
)
Float timer runs
Inverter now charging to a new
set point
Inverter has reached the charging
set point
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
Refloat
Absorption
Float
Silent
Refloat
Float
Silent