Supply voltage 4 - 16V
System voltage 12V
Measuring range (sense wire blue) 8 - 16V
Display range (battery voltage) 11.0V - 12.8V
Alarm level main and aux 12.0V
Display range (charge) 13.0V - 14.5V
Consumption monitor 1mA
Consumption max. display active (30 sec) 20mA
Isolator link-on/off threshold 13.1V/13.0V
Consumption on-state (relay) 0.6A
Relay continuous load current 200A
Relay current inrush 500A
Relay contact material Silver (AG SnO2)
Free combination of batteries possible? Yes
Operating temperature -40°C - +80°C
Housing ABS black
Sealing level IP40
Size, dimensions 100 x 65 x 24mm
Red - Supply/sense (main battery)
Black - GND (main battery)
Blue - Sense (aux battery)
Green - Control relay (open collector)
Wrong polarity & against overload of solenoid driving
circuit on PC board with SMD electronically security
devices, no fuses have to be replaced.
Alternator Upgrade Kits Dual Battery Management System
Kit contents -
200Tdi alternator upgrade kits.
Kits include uprated cable.
DA1195 Defender - 200Tdi
Upgrade the 45A alternator to 100A
DA1196 Discovery 1 - 200Tdi
Upgrade the alternator to 100A
Heavy-duty 200A split charger
Microprocessor Controlled Dual Battery
Connect an electrical recovery winch to the main battery
as shown in the wiring diagram.
This fully automatic battery management system
separates the starter battery from auxiliary battery if
the vehicle has stopped and links them while the car is
running. All systems are equipped with a 200A power
relay. For emergency situations all systems are equipped
with the manual override function (link). This manual
linking function (called load sharing) is very helpful for
jump starting or when using high current appliances
such as an electrical recovery winch, power inverter or
compressor. The kit includes a 4.7m wiring loom with
sealed automotive plug, battery and crimp terminals for
easy installation. The battery monitor is installed in the
vehicle (dash) and informs the driver about the charge
level of both batteries, the charging voltage from the
alternator or an additionally installed solar system and the
relay link status. The system offers low battery alarm on
both batteries and a link failure alarm. Includes a manual
link for 30 and 120 minutes with automatic return.
Display of Battery Voltage (Energy Level)
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
This function is called by pressing the display button for about 30 seconds.
Display of Charge Voltage while charging
Red: >14.5V: High loading of batteries, may be present at cold ambient temperature for a longer time.
Yellow: >14.0V: Proper charge mode.
Green: <14.0V: Save charge mode, no damage to batteries.
Bi-directional Automatic Battery link
While the engine is running the main and auxiliary 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 such as fridges, lights, compressors, inverters are now safely fed from the auxiliary battery. With the
additional charge by solar equipment, battery charger or generator is sufficient for charging, the starter battery will be
charged automatically with auxiliary battery together (green LED “link” lights).
Manual Battery “link”
In an emergency situation (defective or empty main battery) or in case of higher power consumption the two batteries
(main & auxiliary) may be connected together by activating the link button (red LED manually linked is on). After a lapse
of time of 30 minutes (or immediately after activating the auto button), the system returns to the automatic mode. When
using an electric winch, the battery connection can be activated for 120 minutes by pressing the link button twice. In
this mode sounds a beep every 30 seconds to remind of this status (auto return after time expired). The load sharing
function with the manual battery connection reduces the load on the alternator, the wiring and the batteries in the use
of the winch.
Low battery alarm
If the battery voltage of one or both of the batteries, is for a longer period below 12V, the sound low battery with
“Beep” and the LED “Low Battery” of the corresponding battery (main and / or auxiliary) flashes. With the display
button, the “Beep” is switched off. The blinking LED “Low Battery” is reset if the battery voltage is exceeding 12V.
Link failure alarm
The monitor monitors the charge on both batteries. When fitting charge (from alternator, solar, charger) no charge to
the other battery is detected, the link error alarm with flashing green LED “linked” and the “Beep” sounds. If this error
occurs, check immediately the wiring of the power cables to (relay, battery terminals, crimp contacts, control relays).
After bug fixes, alarm will automatically reset.
Deactivation of automatic and manual battery dual link function
Is there a problem with the auxiliary battery (aux) as short circuit of cells, short circuit or defective battery housing,
leading to damage of the generator (alternator). In an emergency situation the battery system can be operated in the
vehicle in the basic configuration (alternator, starter battery without additional charge to auxiliary battery). By pressing
the link button for 6 seconds (until the sound of the beep), the link is deactivated. In this mode, no manual and
automatic battery connection is possible. This feature can solve the battery problem of the auxiliary battery by pressing
the auto button for 6 seconds to be reset. Now the system is working again with all the functions.
DA1174GM Mounting plate with flexible arm
DA1174SM Mounting plate with swivel mount
DA1174HM Mounting plate with swivel arm