ATEMPOWER AP20DC User manual

USERMANUAL
AP20DC
DC-DC CHARGER
V3.1

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IMPORTANT SAFETY INSTRUCTIONS !
Children or adults under the influence of alcohol or drug, or those who lack of experience or professional
knowledge are not allowed to use this unit.
The user must read and understand all of the warning and safety messages supplied with your product
prior to installation or use.
Do not use or store this charger near heat sources such as fire or heaters or expose it to flammable
chemicals, vapors or corrosive gases.
Please only use this product as intended.
Do not strike, throw the charger.
Do not mount the product in places where there is a risk of gas explosion.
Please do not expose the charger to moisture or harsh environments.
Please do not disassemble this charger as such action will not only cause potential damage to you and
your unit, but also void the warranty.
Please disconnect the charger before maintenance or cleaning.
This DC-DC charger can only be repaired by professional personnel.
Before charging, please wear proper eye protections.
Keep fresh water and soap on hand in the event battery acid comes in contact with eyes. If this occurs,
cleanse right away with soap and water for a minimum of 15 minutes and seek medical attention.
Do not smoke or have an open spark or fire near this unit.
Avoid dropping any metal tool or object on the battery. Doing so could create a spark or short circuit
which goes through the battery or another electrical tool that may create an explosion.
Examine the battery charger regularly for damage. If the battery charger is damaged, it must not be
used until it has been repaired.
Please note that this DC-DC charger is not waterproof.
This product should be firmly fastened to prevent fall down or tip over.
Inadequate ventilation may lead to overheat and inefficient charging.
ABOUT US
ATEM POWER, born in June 2017, as a synonym for exciting outdoor experience, is an Australian
company with dedication and passion for the R&D of high quality products in the field of renewable
energy products, batteries and related accessories.
Since the company was founded, we have committed to innovation that aims to make your life
infinitely more convenient. And the belief in our conviction for quality and commitment allows us to
innovate in developing products that are optimally tailored to the needs of our amazing customers.
We engineer and supply solar products for homes, 4x4s, recreational vehicles and virtually any
application you can think of. And we also develop reliable, high performing deep-cycled batteries
and lithium batteries for standby or daily power needs. Accessories include battery chargers and
inverters that are ideal for RV's, commercial vehicles, boats, yachts and many more applications!
At ATEM POWER, we stay true to our DNA by prioritizing technological innovation designed to
improve our products and striving to provide excellent customer care. Because we are motivated
to explore the limits of solar power!

KEY FEATURES
IDENTIFICATION OF PARTS
STAGE OF CHARGING
This DC-DC charger by ATEM POWER, which is ideal for 4WDs, caravans, RVs, trucks, campers, trailers,
campervans, commercial vehicles and boats, offers an effective way to charge your auxiliary batteries from
the alternator or solar panel (up to 20A) to charge LiFePO4 and lead acid: AGM,Gel & calcium batteries. It
also has a built-in MPPT regulator to maximize energy absorption, thus reducing the load on your engine.
And over-charge, short circuit, over-temperature, solar input overload, input/output reverse polarity
protection have been integrated to offer an extra layer of protection. Furthermore, the charger allows you to
re-select the battery during charging by long pressing “POWER”, and LED indicator showing stage of
charging. And memory function is integrated to make charging more convenient.
(1) Qualification
(3) Bulk
(5) Full and Analysis
DC Input (+)
DC Input (-) Solar Input (+) Solar Input (-) Output (-)
Output (+)
Press to select battery type.
Long press to re-select batteries during charging.
(2) Recondition
(4) Absorption
(6) Recharge
PACKING LIST
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ACCIgnition
Line(optional)
AGM/GEL

INSTALLATION INSTRUCTIONS
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PleasecheckwhetherthespecificationofyourcableiscompatiblewiththisDC-DCcharger.
Thischargercanbeinstalledbothhorizontallyandvertically.
Pleasemakesurethatthechargerisinstalledascloseaspossibletothebatteryyouaregoingto
charge,andyoualsoneedtomakesurethattheareasisnotsusceptibletomoisture,water,dustor
hightemperatures.
Pleaseensurethatthereisnoheatsourceorflammablegasaroundtheunit.
Andersonplugisrecommendedwhenthischargerisinstalledonacaravanoracampers (seepicture
below).
Twincorecablewillbeusedbetweenthestartbatteryandthecharger,andyouneedtoconnectthe
commonnegativeandcommonpositivewiresfromthestarterbatterytotheinputoftheDC-DCinthe
appropriatepositiveandnegativeterminals.
Itishighlyrecommendedtoinstalla40Ampcircuitbreaker(notincludedinthispackage)thatshould
beinstallednearthestarterbattery.
Checkwhetherallconnectionsarecleanandtight.
positionwhenenginestarts,whichwillbedetectedbytheDC-DCcharger.Andthemainbatterywill
startchargingyourauxiliarybattery.
Note: thechargermaydischargeyourmainbatteryiftheACClineisconnectedbutyoukeyisnot
turnedtotheSTARTposition.
You can connect the optional ACC line to the ignition of your vehicle, then turn your key to the ACC
This charger can also be connected to the solar panel, see detailed wiring diagram at Page 5.

HOW TO USE
1. DC Battery
Start your vehicle and let it idle.
And the charger will recognize that there is a charge being applied to the main starting battery.
The charger will charge the auxiliary battery when the main starting battery has reached 13V (ACC line not
connected). The main battery will start charging the auxiliary battery when its voltage is or above 11.5V
(ACC line connected).
Press “POWER” to re-select batteries (The default setting is for lead acid battery, and your setting will be
saved once selection is made).
The charger will continue to operate even after the vehicle has been switched off, however when the main
starting battery falls below 12.5V the charger will automatically shut off (ACC line not connected). When the
main starting battery falls below 10.8V, the charger will automatically shut off (ACC line connected).
2. Solar Input
The charger will shift to solar charge mode when the input terminal is connected to the solar panel.
Press “POWER” to select the corresponding battery type, and batteries can be re-selected during charging
by long pressing the button.
Charging begins when the output of solar panel reach 16V~25V,and the panel will stop to charge when its
output is below 10V.
Note: This charger is not designed to charge your auxiliary battery with DC inputs and solar
concurrently, DC enjoys input priority over solar. When the voltage drops to 13.2V for LiFePO4
battery/12.3V for AGM, Gel & Calcium after a full charge, a recharge will begin.
Wake-up of Lithium-Ion Batteries in Sleep Mode: this DC-DC charger cannot charge a lithium-ion
battery in sleep mode. To charge the lithium-ion battery, first make sure the DC-DC charger is
correctly connected to the battery. Then select the “LiFePo4” mode, and long press “POWER” for 5s.
The “charging” (red) indicator will flash for 10s. If the battery is successfully waken up, the “charging”
(red) indicator will be constantly on and the DC-DC charger begins to charge the battery. Otherwise,
the DC-DC charger will enter the standby state and the “Power On” indicator will be on.
DEEP CYCLE BATTERY MAINTENANCE
This DC-DC charger by ATEM POWER will be used to charge your auxiliary battery, for example, deep cycle
batteries that are designed to provide power for your fridges and light in caravan or camper.
Your fridge might use appropriately 24AH per day. In this light, if your 100AH battery is only used to power
your fridge while receiving no charge, and it would require charging after 48 hours.
To replenish the capacity of the battery (100AH capacity, 50AH discharged), you may need to use a 40amp
DC-DC charger that would further require at least 1.25 hours of driving/solar charging. A 30 amp unit will
require at least 1.67 hours of driving/solar charging to fully recharge the battery. A 20 amp unit will require at
least 2.5 hours of driving/solar charging to fully recharge the battery.
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