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Body Electrics

Microprocessor Controlled Dual Battery Management System

Microprocessor Controlled Dual Battery Management System
Microprocessor Controlled Dual Battery Management System
Microprocessor Controlled Dual Battery Management System
Microprocessor Controlled Dual Battery Management System
Microprocessor Controlled Dual Battery Management System

Microprocessor Controlled Dual Battery Management System

Brand : Britpart
Product Code: DA1174
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Separates the starter battery from auxiliary battery if the vehicle has stopped and links them while the car is running.

This fully automatic Swiss made Microprocessor Controlled Dual 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)
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
This function is called by pressing the display button for about 30 seconds.

Display of Charge Voltage while charging
LED indicators:
Red: >14.5V: High loading of batteries, may be present at cold ambient temp. 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 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 a beep sounds every 30 seconds to indicate 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.

Alarm functions:
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
If there is 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.

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

Accuracy: +/-1%

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

Weight: 800g

Red - Supply/sense (main battery)
Black - GND (main battery)
Blue - Sense (aux battery)
Green - Control relay (open collector)

Protected against:
Against wrong polarity
Against overload of solenoid driving circuit on PC board with SMD electronically security devices, no fuses have to be replaced

      UK Mainland Orders
      We aim to dispatch the same day on orders in stock placed before 3pm Monday to Friday. Orders placed after 3pm on a Friday will be sent out on the Monday after. Deliveries will take place on working days (Monday to Friday) unless the service is upgraded. We only use a next working day delivery service. We also offer a local collection service. 

      Special & Saturday Deliveries
      Please contact us for a delivery quote if you would like to upgrade your order to a Timed or Saturday service. 

      Remote Delivery
      Some remote UK locations are 48 hour minimum delivery, we cannot guarantee Next Day Delivery for these areas. Please be advised that locations such as the Scottish Highlands may incur a delivery surcharge. Contact us prior to purchasing if you're unsure as to whether this will affect you.

      We offer a worldwide delivery service, please contact us prior to ordering to ensure we can deliver to your country and for pricing/estimated arrival times. Please note: Import duties, taxes, and charges are not included in the order price. These charges are the buyer's responsibility and not that of MM4x4. Please check with your country's customs office to determine any additional costs prior to purchasing.

      Returns Policy

      Faulty Goods: Products are warranted for up to 1 year (Warranty maybe longer depending on the product purchased). If the part is found to be faulty, we will repair the product or if that's not possible, give you a replacement.

      Unwanted Goods: If you decide that you do not want any item that we have delivered, we are happy to offer you an exchange or refund within 14 days of delivery, provided that it is returned to us in its original and unused condition (including its original packaging), along with the wrapping and invoice (as proof of purchase). A 15% handling and re-stocking fee is applicable to all parts and accessories that are not faulty.

      How to return goods: To return an item, you must first contact MM4x4 by email or telephone us on 01905 451506. We will issue a Returns Number which must accompany the goods being returned, let us know which item(s) you wish to return, and the details of any fault, along with your invoice number and your personal details. Please click here for our full returns policy and instructions.


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