together. If the solar system needs to be grounded, you can choose any negative grounding!
8. About LCD backlight
If no key is pressed, the LCD backlight will turn off automatically after 15s. When any key is
pressed, the LCD backlight will turn on again.
Battery Charging Process
The controller has a three-stage charging mode, namely bulk charging, boost charging and float charging. Through these fast, efficient and safe battery charging methods, the service life of the battery can be
effectively extended.
Bulk Charging ：
Fast charging stage, the voltage of
battery is not reach to full charged set point. (Float
point or Boost point), the controller will be work at
MPPT mode. In process of Maximum Power of solar
panel charging.
Boost Charging ：
Each time the battery voltage less
than 12.6V, the controller will auto boost charging one
time. When the boost voltage reach to set point, the
controller will join into constant voltage charging
mode instead of MPPT mode, and gradually reduce the charging current, the boost charging continued
2H then go to float charging mode. (Due to the load capacity and generated changing, the controller
can't keep constant voltage charging, the constant voltage charging time will be accumulated,
accumulate 2hours cancel boost charging mode.
Float Charging：
After entering the floating charging mode, the controller will reduce the charging current
and charge weakly to maintain the battery at the floating charge voltage value. (if the voltage is not lower
than 12.6V, the boost charging mode will not be started, only floating charging will be carried out)
Main Interface
Name
Symbol
Indicate function
Solar Panel
Correct connect solar panel and in daytime
No connect solar panel or wrong connection
or at night
MPPT mode charging
Float charging mode
Boost charging mode
no charging
Data about charging
Battery capacity indicating
12V24V48V
Present System Voltage Show
