Steca Xtender
Installation and Operating Instructions 723.932 Xtender V0.511 Seite 20
The charge cycle, programmed by default,
as shown in the example described in the
figure opposite, runs automatically.
The line (28) indicates the development of
the battery voltage.
The lower line (29) indicates the battery
current (input and output).
The cycle starts with a continuous current
charge (a) adjusted by default according
to the configuration {1138}. If the ambient
temperature is increased or the ventilation
blocked, the current may be reduced and
become lower than the selected current.
Once the absorption voltage {1156) is
reached, the cycle passes to voltage
adjustment mode (d), known as the absorption phase, the duration of which is set by the
configuration {1157}. The minimum interval between two absorption cycles is limited by the
configuration {1161).
{1140}
{1156}
{1138}
{1159}

ade

28

29

ACin=OK
Cycle de charge simplifié, sans limitation de
courant d'entrée
At the expiry of the absorption time, or if the absorption current is lower than the configuration
{1159}, the voltage is set to a lower value {1140}. This phase (e) is known as the maintenance or
“floating” phase.
Given the limiting function for the input current (see the following p. 21), it is perfectly normal for
the charge current to be lower than the selected current if the limit of the AC input current {1107}
is reached (b). In this event the AC IN indicator (45) flashes.
If the “smart boost” function is activated {1126} and the power required by the consumer exceeds
the power of the source, the battery will be discharged (c) despite the presence of the grid or the
generator. In this case the LED “charge” (4) goes out. The consumers must ensure that they
have average consumption that is less than the power of the source (generator or public grid) in
order to avoid a complete discharge of the battery. These situations are set out in the figure
below.
ACin=OK
abcadec ade

{1156}

{1140}

In 0

Out

{1143}

{1138}

2829
Fig 3a
Charge cycle example with input current limitation "smart boost”