Product Manual

The Sterling Battery-to-Battery Charger will charge your extra battery bank about 5 times faster and will put
about 50% extra power into them compared to conventional charging technology. It will also increase the life of
your batteries by de-sulphating them. The charger can be programmed for all major types of batteries. I.e.
open or sealed lead-acid batteries, gel and AGM batteries, all of which will be charged with their recommended
charge characteristics.
Fast and easy installation. Simply connect the unit to your starter battery and your aux battery as per the
illustration on page 2.
No extra connections to the alternator and no extra wiring for a split charge system required.
Battery bank positive leads are insulated. Engine starter battery is always well maintained.
Several battery-to-battery chargers can be used in parallel for higher output power or multiple battery
banks.
No voltage rise on the alternator or the starter battery, thus no problems with the engine management
system.
No warranty issues as the alternator and the main electrical system remains untouched.
The Sterling Battery-to-Battery Charger constantly monitors the engine start battery. When the
starter battery voltage exceeds13.3 volts (which is usually the case when it is being charged) the charger
will activate itself. It will then start its charging operation during which the starter battery voltage will be
pulled down to no less than 13 volts. This enables the engine battery to still receive sufficient charge and
ensures that the alternator works at its full potential. The unit takes the 13 volts from the starter battery into
the control box and boosts it up to a maximum of 15.0 volts (depending on what battery type has been
selected) at the output. This will charge the secondary bank of batteries to their full capacity. The charger
then automatically calculates the optimum absorption time and keeps the voltage at absorption level until
the batteries are fully charged. After that, the system will maintain the batteries at a lower float voltage,
while always ensuring that the engine starter battery has priority.
Install the charger like any other high power battery charger. It can be mounted in any orientation or direction.
Do not install the unit on carpeted, upholstered, vinyl or varnished surfaces.
Fit it as close to the primary (starter) batteries as possible.
Product Advantages
How it works.
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INSTALLATION
1)
Use the magnetic switch to program the battery type according to the
with fuses. If the cables are cut ensure fuses are added, there is no warranty if the fuses are
removed. Fit in a cool and well ventilated place.
Install the unit as per the wiring diagram. Do not cut the cables as they come pre-wired
Manual or automatic activation.
Program the battery type into the unit:
There are 2 ways to activate this product
1) Automatic, 95% of installations can take advantage of the automatic activation, the unit will activate itself
when it senses an input voltage in excess of about 13.3 volts ( the engine is running ) and switches itself off at
13.0 volts ( the engine has been switched off ), the 2 small wires need not be installed for this installation.
2) Manual activation, there may be some unique installations where the auto activation is not desired and the
unit needs to be activated or deactivated by a direct command, i.e. ‘on’ and ‘off’ via a switch or other signal. In
this case the extra wiring must be completed to supply the signal to activate the unit. Cables 1 and 2 (as per the
installation guide must be installed, the unit will simply work when there is 12 to 15 volts on the cable and stop
when the feed is removed). Still the voltage restrictions apply (> 13.3V)
Select the battery type you require from the list below and printed on the label.