IBS is offering three different Dual Battery Systems for various requirements and applications. The equipment BM3 and DBi have the same functionality. Their purpose is to serve in 4WD's, in service-cars and in Police- and Ambulance-vehicles.

Display of Battery Voltage (Energy Level)

The battery voltage of each battery is visible for 45 sec after pushing the display button.

LED indicators:

green: Batteries are in the safe working range
yellow: Check batteries
red: Batteries should be charged


The LED’s show the energy level if all loads are switched off.
12.6V = 100%
12.4V = 75%
12.2V = 50%
12.0V = 25%
11.0V = flashing and beeping indicates low battery situation


Display of Charge Voltage while charging


LED indicators:

red: >14.5V: Batteries will be overcharged, damage to batteries may occur.
yellow: >14.0V: Proper charge mode.
green: <14.0V: Save charge mode, no damage to batteries.


New bi-directional Automatic Battery Link

While the engine is running the Main and Aux batteries are linked together for parallel charging from the alternator (green LED linked is on). If the engine is stopped, the two batteries will be disconnected automatically with some delay. Appliances as fridges, lights, compressors, inverters are now safely fed from the Aux battery. Extra charge on Aux battery (Solar) is detected and batteries are linked (green LED linked is on).

Manual Battery “Link”

In an emergency situation (defective or empty Main Battery) or in case of higher power consumption the two batteries (Main & Aux) may be connected together by activating the link button (red LED manually linked is on) After a laps of time of 30 minutes (or immediately after activating the auto button), the system returns to the automatic mode. The Load Sharing Function with the manual battery link reduces the stress on alternator, wiring and the batteries in conjunction with the use of electrical winches. If high power consumption is needed from both batteries for longer time, actuate the link button again before the 30 minutes-timer expires, preventing from batteries separation. Avoid to activate the auto button under full load.