Manual
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Getting Started
Step 5. Turn Engel Smart Battery Box ON
Step 4. Close the lid and fasten the latch.
Press power button once
Step 6. Connect Engel Smart Battery Box to your chosen
adaptor (240V AC or 12V DC) then connect adaptor to
power supply, either 240V(AC) or 12V(DC) outlet
240V AC or 12V DC
Secure Connection:
Simply pull back the
plug sleeve, insert,
then release. This locks
the lead into the Engel
Smart Battery Box for a
secure fit in all situations
- especially on the move
+ -
+ -
Connecting the Battery
Step 1. Release the front latch
and open the lid.
Step 2. Place a 12 volt lead acid battery (not
supplied) into the base of the Engel Smart
Battery Box and secure it with the velcro belt.
Step 3. Connect the red cable to the positive
battery terminal. Then connect the black cable
to the negative terminal. Make sure the nuts
on the battery terminals are firmly fastened,
also make sure any battery carry ropes are
positioned away from the terminals and battery
leads to avoid interference when closing the lid.
Troubleshooting and FAQs
Q. How do I know if the battery is fully charged?
A. The % charge of battery value on the lower right hand side of the main data screen
will read 100%. Refer to page 7.
Q. I have installed the battery correctly but the LCD screen reads “Alarm - open
circuit”, what is wrong?
A. The battery is faulty or the 10A “main” fuse is blown, also check battery cables are
firmly tightened to battery terminals.
Q. How can I tell what stage the charger is in?
A. The battery charging cycle is indicated on the lower left hand side of the main data
screen. Refer to page 7.
Q. What does Ahr mean?
A. An “amp hour” (abbreviation Ahr) is a unit of electrical charge and refers to the
battery’s capacity. A power source rated at one amp hour can deliver one amp
continuously for one hour or two amps for half an hour or sixty amps for one
minute etc.
Q. What type of batteries will the Engel Smart Battery Box charge?
A. The Engel Smart Battery Box can charge lithium iron phosphate batteries and most
types of rechargeable 12V lead-acid type battery from 60 Ahr capacity up to 140Ahr.
There are four main types of 12V lead acid battery - conventional wet lead-acid battery,
calcium, AGM and gel. The Engel Smart Battery Box can charge both cold cranking
type car batteries and deep cycle batteries.
Q. How do I know which battery type and Ahr rating to select?
A. Normally the battery type and Ahr rating is marked on the battery by the manufacturer.
If you are not sure contact your battery retailer. It is very important that the correct
battery type is selected since the charger uses a different charge technique for each
battery type.
Q. Can I charge the battery using the external terminals or accessory sockets?
A. Yes you can as long as the main isolator switch is in the “on” position. This type of
charging is not controlled by the on-board microprocessor since the charge current will
flow direct to the battery via the main isolator switch. If an external voltage regulator is
not used there is a risk of overcharging and damaging the battery. Please also consider
the accessory sockets are fused at 10A so a current flow higher than this will blow
the fuse.
Q. Can I leave the Engel Smart Battery Box continually plugged in?
A. Yes the Engel Smart Battery Box will go into float cycle.
Q. My AC adaptor gets hot when charging, is that okay?
A. Yes that is normal, it can reach 75°C.
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