CombiMaster 230V Series
– User and Installation Manual
21
Figure 6: 3-step charge algorithm. See section 8.2 for detailed information.
The
BULK
phase is followed by the
ABSORPTION
phase. Absorption charging starts when the voltage on the batteries has
reached the
BULK
voltage and ends when the battery is completely full. Battery voltage remains constant throughout this stage,
and the charge current depends on the degree to which the battery was initially discharged, the battery type, the ambient
temperature, etc. This stage lasts for 4 hours maximum. Once the battery is 100% full, the CombiMaster automatically
switches over to the
FLOAT
phase.
Connected DC loads are powered directly by the charger. If the load exceeds the charger capacity, the required additional
power comes from the battery, which will be progressively discharged until the charger automatically switches back to the bulk
phase. Once consumption decreases, the charger goes back to normal operation of the 3-step+ charge system.
Connected to the CombiMaster, the batteries can be left unattended for weeks or months. One hour every 14 days the charger
automatically switches to
ABSORPTION
to keep the battery running properly and prolong its life span. The 3-step+ charge system
is also safe for all the connected equipment.
WARNING
The MLI charging voltages on this charger fit the Mastervolt Li-ion (MLI) batteries but do not necessarily fit other Li-
ion batteries! Always follow the instructions provided by the battery manufacturer!
6.4
Temperature compensated charging
By installing the battery temperature sensor sensor (for Lead
Acid batteries only), the charge voltages are automatically
adapted for deviating temperatures.
When the battery temperature is low, the charge voltage
increases. On the other hand, when the battery temperature is
high, the charge voltage is decreased. Overcharge and gassing
are prevented this way. This will extend the life of your batteries.
Figure 7: Temperature compensated charging