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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