Connection
(Please consult the connection plan for your device!)
LiFePO4 Batteries:
Installation: The sensor must have a good thermal contact to the inside
temperature of the battery. Thus, it should be attached to the negative pole
of the battery, because in case of LiFePO4 batteries, in most of the cases,
this is the cooler side (the temperature at the side of the positive pole is
often falsified by exhaust heat of internal fuses and electronic systems for
cell equalization etc.)
Effect: In case of abnormal battery temperatures, such as <-20°C, >50°C,
the charging voltage will be reduced strongly to safety charging voltage,
approx. 12.80V, for battery protection, and the maximum charging current
rate will be halved. Safety mode, LED „MPP“ is flashing (SCD 12 :
„Charge“). Any charging data being recorded hitherto will be kept in
memory.
Battery charging is then interrupted but the supply of consumers being
possibly connected will be continued by the solar controller until the battery
temperature is in the admissible range. After that, automatic charging will
be resumed.
Below 0°C, the charging current will be reduced very strongly for battery
protection, and longer charging times can be expected.
The solar controller automatically recognizes if the sensor is missing, cable
breakage or short-circuit of the sensor lines, as well as invalid measuring
values. In that case, it will switch automatically to the usual charging voltage
rates of 20°C / 25°C recommended by battery manufacturers.
5. Solar Display (Optional)
The VOLTIMA solar controller has a connection to display the following
values: battery voltage, charging current, charging capacity, stored
capacity and energy (V, A, W, Ah, Wh).
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