BB1224120
Input / starter
battery 12V
Domestic / House
Output Battery
V
24
Lead Acid or Lithium
SIMPLE WIRING DIAGRAM
STERLING
POWER
Basic installation diagram
Here, we hope to provide a very
basic installation diagram for the
vast majority of installers to
follow.
If a process is not mentioned
here, the chances are that it is
not a pre-requesite to get the
BB1224120 to function.
The default charging profile is a
standard sealed lead acid
charging profile of 28.8V and
26.6V float.
If you wish to charge a lithium
battery, please see overleaf.
Charging modes
In default mode, the BB needs to
see 13.5V on the input terminal
to begin charging the output
battery. When the input then
drops below 12.8V the BB will
stop charging.
12V ignition signal, required for
Euro 6 / Smart alternator use.
Ignition gives a binary on / off
style signal to control the
BB1224120. Connect ignition
cable to ‘ign’ connector If ignition
.
signal has been applied to the
BB the BB shall remain
dependent up a live ignition to
operate. Do a factory reset to
restore BB to default settings.
Vibration sensor mode. This
requires you to switch the
Vibration sensor switch on. If the
unit detects a vibration event the
BB shall turn on and begin
charging.
Factory reset - hold
Select button for 15
seconds
Recommended installation
orientation
The BB1224120 can be mounted
in any orientation. However, if
the area is prone to getting wet
or damp, we recommend the first
or second install.
*Label rendered for clarity,
.
PRODUCT INFORMATION
Air Flow
Air Flow
150A
fuse
80A
fuse
35mm2 / 2AWG cable
16mm2 / 6AWG cable
12V ignition signal (optional)
Alternator
If prone to getting damp,
this mounting option may
result in pooling of water at the bottom
35mm2 / 2AWG cable
common negative
nothing to change in the setup.
Simply plug cables in and start engine.
More detailed information overleaf.
sterling-power.com
RoHS
compliant
Online full instruction manual PDF
12V to 24V Battery to Battery Charger
120A input | 60A output
BB1224120
Input voltage
Charger on - 13.5 -> 16V
Charger off - <12.8V
Input v ign feed.
Charger on - 11.6V -> 16V
Charger off - <11V
Input v vib. sense.
Charger on - 11.6V -> 16V
Charger off - <11V
Charging modes
input
output
Reverse Charging Feature -
There is nothing to setup with regards the reverse charging feature. Provided there is over 26.4V/27.0V on the leisure
battery (lead / lithium) and the starter battery is below 13V the BB shall allow approximately ~40A to flow back to the
starter battery up to about 13.4V (float voltage). It simply allows the starter battery to remain topped up when there is
surplus energy in the domestic battery. This feature will NOT drain your domestic battery - it simply takes surplus.
Once your alternator / engine turns on or you provide the BB with an ignition signal the BB reverts to normal charging
of the leisure battery. To remove this feature, see overleaf.
temperature sensor - optional fit
sterling-power-usa.com
For Negatives
PLEASE USE DIRECT CABLING
DO NOT USE CHASSIS POINTS
Temperature sensor included - optional fit.
- Allows for temp voltage compensation for
lead acid batteries. No temp comp. for
lithium.
- 0 Deg C trip for charging lithium.
- High temperature trip protection.
- connect to negative terminal of domestic
battery.
BB1224120
12V - 24V
12V 120A input | 24V 60A output
Battery to Battery Charger
bidirectional
