30 | Frequently Asked Questions
5 FREQUENTLY ASKED QUESTIONS
The BCDC Core Input turns ON at 12.9 V (12 V) and OFF at 12.7 V (11.9 V), but you say it
operates down to 9 V, explain?
The BCDC Core Input will turn OFF for a split second every 100 seconds to measure the unloaded
voltage at the battery. When the BCDC Core Input turns off, it is not drawing any load from the
start battery. No load means that there is no voltage drop over the cable run. This allows the BCDC
Core Input to measure the actual battery voltage, or the voltage at the battery. If this actual battery
voltage is below 12.7 V (11.9 V), the BCDC Core Input will turn OFF. At any other time during the
charging process if the voltage at the BCDC Core Input drops below 9 V, the BCDC Core Input will
turn OFF.
How does the BCDC Core Input charge an Auxiliary battery at 14 V when it
only gets 9 V in?
The BCDC Core Input can act as both a reducer and a booster, so it can operate from a voltage
of above, equal to or below the desired output voltage. The unit is also microprocessor controlled
allowing it to output a REDARC proprietary charging algorithm independent of the input. This allows
the unit to charge specific to the battery type even if the input voltage is low due to voltage drop.
Where should I mount the BCDC Core Input Unit?
The BCDC Core Input should be mounted as close as possible to the battery being charged
(generally called the Auxiliary or House battery). If the BCDC Core Input is to be mounted into a
Caravan or Camper, near or in the battery compartment is generally the best position. It is also
a good idea to mount the BCDC Core Input to a metal surface if possible to ensure optimal heat
dissipation, though this is not crucial.
What does the charger do if the temperature around it rises above its operating
temperature?
As the temperature of the BCDC Core Input rises above a certain level the current capacity of the
output is decreased gradually in order protect both the battery and the BCDC Core Input unit.
If I use the BCDC Core Input to charge my auxiliary battery do I still need to install a
battery isolator?
The BCDC Core Input incorporates the functionality of a battery isolator, it will turn ON and start
charging when it senses that the vehicle has started and similarly it will turn OFF when the vehicle is
turned OFF.
Summary of Contents for BCDCN1225
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