3.1.2 Temperature Compensation Of Final Charge Voltage
As the battery temperature increases, the
acid/lead
battery’s optimal final load voltage decreases.
A constant
final charge voltage leads to uncontrolled
gassing in
the case of higher battery temperatures, and
undercharging in case of low temperatures.
The
temperature compensation software algorithm
automatically
decreases the final charge voltage at higher
temperatures
and increases them at lower ones. The
temperature
compensation system with the sensor
integrated in
the System-Manager influences all three
overcharge
thresholds.
The integrated sensor makes maintenance
and
installation easier and can be properly used
under the
following circumstances:
•
System-Manager and battery must
be
in the same room
-20
-40
-10
-14
-0
32
10
50
20
68
30
86
40
104
50
122
13,2
13,5
13,8
14,1
14,4
14,7
15,0
[°C]
[°F]
2,20
2,25
2,30
2,35
2,40
2,45
2,50
[°C]
[°F]
2,35
2,40
2,45
2,55
•
the System-Manager’s own
warming-up is compensated by substantial calculations. However, even if the sensor was outside the System-
Manager, the room temperature itself only corresponds to the battery pole temperature, so actual electrolyte
temperature inside the battery may be actually different by a bigger margin of error.
•
However, an external sensor can be installed if the most accurate sensing is desired.
3.1.3 Boost Charging (Lead&Sealed) And Equalisation Charging (Only Lead)
For this charging cycle, the System-Manager increases the battery charge voltage for a certain period of time after the
battery has fallen below a certain voltage. The Boost Charge countdown is only activated when the desired battery
voltage has been reached. This is the reason why it is important to pay attention to the fact that the solar module will be
able give out sufficient charge energy with the corresponding final voltages.
If the Boost Charge voltage level is too high in comparison with the module voltage (reduced by
wire losses) the countdown may never be started and your battery is therefore charged at a
higher voltage with no time control.
Equalising charge works similar to the above Boost Charging but is at an even higher voltage. Using equalisation
charging is only possible and can only then be programmed if the battery has been configured to be of liquid electrolyte
type. It is activated when the battery falls below a certain voltage
3.1.4 Automatic Monthly Mixture Of Electrolyte
Batteries that are shallow cycled will never trigger the equalisation cycle, so an automatic function has been added so the
final charge voltage is increased for a limited time every month. In this case, either Boost or Equalise charging is
activated depending on the electrolyte configuration. This function prevents harmful acid layering which occurs especially
after remaining a long time at a certain charge status.
3.1.5 Display
The display scrolls every 3
rd
second. Pressing once the OK button stops the scrolling at the actuell window. Pressing
this key will start the scrolling again.
The LCD works correctly only within the operating temperature range specified by the manufacturer. When this
temperature range is exceeded, disturbances may occur which prevent reading the display. The display will return to
normal when the operating temperature range is again reached. The storing temperature range, however, must not be
exceeded or permanent damage may occur.
3.1.6 Overdischarge Protection
Overdischarging leads to sulphation and as result a loss of your battery’s capacity. The overdischarge protection feature
disconnects the loads if the battery is becoming too discharged and re-connects them after sufficient re-charging. The
loads can also be manually switched on/off, so the System-Manager can be used as a main DC load disconnect switch.
System-Manager TAROM | 716148
page 6
V09_45A
