4.2.10 Control Keyboard
By using the tact switches underneath the LCD screen, the factory set values can be configured to the
user’s custom requirement. Freely programmable values can only be changed within a pre-set window.
These minimum-maximum values are selected in a way that even extreme adjustments do not lead to
severe damage to the lead batteries.
However, the operating elements are not protected or locked with a child-proof lock (code). For this and
many other safety reasons, we would highly recommend that you make the System-Manager as well as
the battery room inaccessible to children
4.2.11 System Voltage
The System-Manager adjusts itself automatically to 12 or 24 V system. For this it is necessary that the
battery of the proper voltage is connected to the System-Manager first.
There are two variants of the System-Manager: one for the system voltages of 12/24V and another 48V
version. The 12/24V System-Manager only adjusts itself for system voltages below 30 V. For 48 V
systems you will need another model with more voltage-stable components. Please have a look at the
marks on the case for information if your System-Manager fits the desired system voltage.
5 Indication Of Status
5.1 LC-Display
The two-line display indicates all present system values in short form on the top line, and the values are
without units (Volt, Amp, etc) due to a lack of space. Here as a reminder: the meaning of the first display
line:
State of charge
SOC
battery voltage
Bat
charging currents
IN
discharge currents
OUT
The second line constantly changes its information. All values and system information are indicated
alpha-numerically. The following displays can only be seen during regular operation (not while
programming).
SOC means “state of charge” and indicates how much remaining capacity the battery still
has. The SOC is never 100% as due to technical reasons it is easier to indicate a two-
digit number.
U Bat: Since the voltage drop between System-Manager and battery can be calculated
without sensor wires, this display shows the battery’s actual voltage at the battery poles,
and not the voltage at the System-Manager’s connection terminals.
I_in is the sum of the charging currents flowing into the battery. It is composed of the
solar module current running through the System-Manager and the charging current of
further charging generators that are directly connected to the battery via an optional external HS200
current sensor . If no shunts are used, I_in indicates only the solar charging current.
I_out is the sum of discharge currents flowing out of the battery and is composed of the
load current running through the System-Manager and the discharge current of loads
that are directly connected to the battery via an external HS200 current sensor.
I_mod is the charging current produced by the solar modules. It is less than the short
circuit current (which is not displayable anyway). When the voltage of the battery is
getting near the final charge voltage(see example), the module current I_mod is substantially higher than
the charge current (I_in). ”I_in“ will be regulated by the System-Manager in order to protect the battery
from being overcharged.
I_accu is the balance of all charging and discharging currents. As long as the charging
current is higher than the discharging current, the value is positive, in the opposite case,
it is negative.
Messages such as “over-temperature“, “load current“, “low voltage“ and “over voltage“
are warning signs The System-Manager automatically takes steps in order to protect
itself, the battery and the loads. After the error condition ceases to exist, the System-Manager resumes
normal function.
The System-Manager can determine night time from the solar module current. The
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