Charging mode IN
By setting the upper limit voltage UP and the lower limit voltage dn
When the battery voltage is less than the lower limit voltage dn, the relay is switched on and the charger starts to charge the battery.
When the battery voltage is greater than or equal to the upper limit voltage UP, the relay is disconnected and an automatic charge is completed.
The relay is on and blinking IN indicates that it is being charged.

Discharge mode OUT
By setting the upper limit voltage UP and the lower limit voltage dn
When the battery voltage is greater than or equal to the upper limit voltage UP, the relay is switched on and starts to discharge.
When the battery voltage is less than the lower limit voltage dn, the relay is disconnected to complete an automatic discharge function.
The relay is on, and blinking OUT indicates that it is discharging.

Button Function
UP button: Short press to switch the display % and time, long press for 5 seconds to switch modes, charge mode: IN, discharge mode: OUT
SET button: Short press to view the current set parameters. Press and hold the SET button to enter the parameter setting.
DOWN button: Press the button to turn OFF/ON the relay (emergency stop function). Press and hold the DOWN button to set the status of the LCD backlight.