Part Number: DBDC10 / DBDC20
DC to DC
Dual Battery Charger
Manual
For your personal safety read, understand and follow
the information provided in this instruction manual.
Important Safety Instructions
WARNING!
To avoid any personal injury, please read the safety instructions below.
This battery charger is not intended for use by children or inrm persons without supervision.
FOR AUTOMOTIVE AND RECREATIONAL VEHICLE 12V DEEP CYCLE BATTERY USE ONLY.
NOT TO BE USED WITH DRY CELL BATTERIES.
• During the charging process, do not use a naked ame near a battery. Batteries generate
explosive gasses during the charging process that may explode.
• Never smoke or light cigarettes near a battery.
• Do not place tools on top of a battery or allow tools to fall on the battery to prevent the
chance of a short circuit and sparks.
• Always wear eye protection when charging a battery.
• Ensure charging and testing is conducted in a well-ventilated area.
• Inadequate ventilation may over-heat the charger and cause in-ecient operation.
• This battery charger is not intended for outdoor operation. Do not expose it to moisture or
extreme weather conditions.
• The ACID/FLUID within a battery is highly corrosive and poisonous. It can produce ammable
and toxic gases when recharged and will explode if ignited, When working with batteries,
always wear eye protection, remove jewellery and ensure the area is well ventilated. If spilt
- it will cause severe burning to eyes, skin, clothing, damage paintwork and corrode many
metals. Ensure that power is disconnected from any appliance in the vicinity of the spill and
immediately wash any area that has been aected with water.
The warnings, cautions and instructions detailed in this instruction manual cannot cover all
possible conditions and situations that may occur. Common sense and caution are factors,
which cannot be built into this product and must be supplied by the operator.
Key Charger Features
This DBDC10/ DBDC20 charger is a sophisticated multi stage charger, utilizing switch mode
and fully automatic computerised control, designed to charge most 12 Volt Gel, Lead Acid and
Calcium batteries.
• Heavy duty aluminum case and mounting brackets
• Microchip monitoring and control
• Fully automatic hi frequency multi stage charging
• Pulse mode technology that reduces oxidation, evens electrolyte consistency and minimizes
temperature equating to longer battery life
• Easy push button chemistry select; GEL, Calcium, Deep Cycle, VRLA and conventional
ooded lead-acid batteries.
• Internal charger temperature monitoring and power output control.
• LED indicators showing state of charge
• Over charging, short circuit and over temperature protection.
• Reverse polarity protection
Installation Options/ Instructions
l
Installing the Charger
Installation of this unit will require twin core wiring - and suitable cable connectors
(not included). See specications page for details.
Any existing cables used in conjunction with this charger will require checking to ensure size
is suitable gauge. Where necessary replace with suitable gauge wiring if they do not meet
minimum specications.
• Locate where you are going to install the DC-DC charger. Ensure the charger is located in a
suitable non-wet area in the vehicle or caravan.
• Ensure the charger is securely mounted using the brackets and screws provided. Charger can
be mounted overhead, vertically or horizontally.
• Next, measure required cable length from the main vehicle battery through to
the location of the DC-DC charger.
• Ensure ALL cabling meets specication and will not be exposed to excessive
heat/moving parts or abrasion.
• If the charger is located in a camper/caravan we recommend the use of an Anderson style
plug between the tow vehicle and the camper/caravan as shown below.
• Fit suitable connectors on either end of the twin core cables.
• Connect the auxiliary battery to (-) shared negative and (+) charger output using twin core
wiring as per recommended cable size.
REAR
(+) DC INPUT (+) CHARGER OUTPUT(-) SHARED NEGATIVE
• Using the twin core wiring laid between the main starting battery and the DC-DC charger,
connect the red (+) to the (+) DC input terminal and the black (-) to the (-) shared negative
on the rear of the charger. Finally, make the power connections to the main starting battery
of the vehicle. It is recommended to install a 25amp circuit breaker (not included) as shown
on main diagram. The circuit breaker should be located close to the starting battery.
• Check all connections are tight.
Suggested tment to vehicle only
Main Vehicle Battery
Suggested tment to vehicle with caravan
Main Vehicle Battery
Charger
Auxiliary BatteryAnderson Style Plug
Charger
Auxiliary Battery
Operating the Charger
Once correctly installed the Battery Link DC-DC charger is a simple set and forget dual battery
switch.
• Start the vehicle and let it idle.
• The charger will now recognize that there is charge being applied to the main starting battery.
• Once the main starting battery has reached 12.8 volts the charger will automatically turn on.
• Once the voltage reaches 13.4 volts the charger will begin to charge the auxiliary battery.
• The initial default setting is for lead acid batteries.
• If you are charging a battery with a dierent chemistry simply change the battery type by pressing
the battery type selector button on the front of the charger.
• Once selected, the charger will remain on this battery type until it is changed.
• The charger will continue to operate even after the vehicle has been switched o, however once the
main starting battery falls below 12.5 volts the charger will automatically shut o.
Specications
Model: DBDC10 / DBDC20
Type: Multi Stage
Input : 12.5 to 16.0 Volts DC
Output / Charging Voltage: 13.3-16.2V (stops charging when alternator output or
vehicle battery below 12.5V)
Output Current: DBDC10
DBDC20
Minimum Start Voltage: 1.5 Volts - for battery being charged
Charge Control
Soft Start: Yes
Bulk Charge: 14.3V (Gel) 14.7V (SLA) 15.6V (Cal)
Absorption Constant voltage with automatic amperage control
Equalisation Automatic
10A
20A
Float 13.3V (Gel) 13.7V (Cal) 13.7V (SLA)
Battery Range: 18 to 250Ah
Cable Length/ Twin Core
0 - 1Mtr 6mm/17AWG
1 -5 Mtr 8 B&S/8AWG
5 Mtr + 6 B&S/6AWG
WARNING!
Failure to use recommended wiring will severely impact on performance of DC to DC charger.
Charging algorithm will change according to battery type.
Charging voltages:
GEL LEAD ACID CALCIUM
Charging 14.8V 15.2V 16.2V
Boost 14.3V 14.8V 15.6V
Float 13.3V 13.7V 13.7V
Additional information
Deep cycle batteries
It is expected that this charger will be used to charge a ‘deep cycle’ type auxiliary battery. Deep
cycle batteries are designed to provide battery power to run items like fridges and lighting in
caravans and campers.
It is generally accepted that the life of a deep cycle battery can be extended if it is not discharged
below 50% of its full capacity. A fully charged 100amp battery in good condition should oer
50amp hours of power without impacting on its normal life expectancy.
Your average compressor style fridge uses up to 5 amps. Over a 24 hour period it should use
approximately 24 amp hours. Therefore if the 100AH battery is operating only the fridge (and
receives no additional charge) it ideally will require recharging after 48 hours.
To replenish these 48 amp hours using a 10 amp DC-DC charger will require at least 5 hours of
driving. A twenty amp unit will require at least 2.5 hours of driving to fully recharge the battery.
Undercharging a battery and discharging to below 50% can severely impact on life expectancy
of most deep cycle batteries.
Approximate
state-of-charge
100% 1.265 12.65
75% 1.225 12.45
50% 1.190 12.24
25% 1.155 12.06
0% 1.120 11.89
The readings are taken at room temperature of 26°C (78°F); the battery had rested for 24 hours
after charge or discharge.
Voltage readings & specic gravity of electrolyte (lead acid batteries) can give an indication of
your battery’ state of charge.
Average specic gravity Open circuit voltage 12V
Additional information
CHARGING POWER
TIPS
• We highly recommend that both the starting battery and deep cycle auxiliary battery are
checked by a reputable automotive store or battery reseller to establish the ‘health’ of your
batteries. (Most outlets oer this as a free service using digital equipment).
If your battery is:
1. Over 3 years old.
2. Has been fully discharged at some stage (Example: headlights left on for several hours then
vehicle required jump starting).
3. Has not been recharged or used in past 3 months.
4. Has been stored in a discharged state.
5. Has any evidence of damage or bulging to battery casing .
• After returning from trip and ‘parking-up’ your camper/van it is good practise to remove all
electrical connections from battery. The batteries should then be fully recharged and ideally
maintained using a smart charger (see Battery Link Pro Series Smart chargers).
Part No: MCU080
12V 8000mA
Part No: MCU012
12V 12000mA
Fault Finding
» Charger won’t indicate
charging.
» Battery won’t charge.
» Battery won’t fully
charge or hold charge.
» • Charger not connected to battery.
• Check terminal connection.
• Battery is not 12V.
» • Verify that all wiring meets specications.
• Check condition of batteries.
• Check performance of alternator.
» Batteries that are over 3 years old; severely discharged (or
previously been severely discharged) ; not regularly recharged;
over- heated; low in electrolyte ; undercharged: overcharged or
sulphated may not accept or hold a charge. A good automotive
store or battery outlet often oer a free or low cost in store
service to check condition of battery. Your battery may require
replacement.
Warranty
Thank you for purchasing one of our quality products. Any
claim against defects under this warranty must be made by the
original purchaser within 12 months from the date of purchase.
To make a claim under the warranty, take the product along
with your proof of purchase to the store where the purchase
took place. Haigh Australia Pty Ltd bears reasonable expenses
for claiming under the warranty. You must submit details and
proof to Haigh Australia Pty Ltd for consideration.
This warranty is provided in addition to other rights and remedies you may have under law:
our goods come with guarantees that cannot be excluded under the Australian Consumer Law.
You are entitled to a replacement or refund for a major failure and for compensation for any
other reasonable foreseeable loss or damage. You are also entitled to have the goods repaired or
replaced if the goods fail to be of acceptable quality and the failure does not amount to a major
failure.
Haigh Australia Pty Ltd
ABN: 67 930 244 928 | PO Box: 3200 Darra Queensland 4076 | Email:sales@haigh.com.au Phone: 1300654008
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