11
Solar Only
Solar energy will be the only charger source no matter utility is available or not.
But when the battery voltage drops below the setting of 21(Low DC Cut-off Voltage) , the utility power will
be used to force a charging cycle to avoid battery over discharging.
If this off grid solar inverter is working in DC to AC invert mode, only solar energy can charge the battery.
Solar energy will charge battery if it's available and sufficient.
Program 15 Alarm On/Off Control
Program 16 Backlight On/Off Control
When off is set, the LCD will go dim after 60 seconds left unattended.
Program 17 Beeps once between AC and DC Transfer
Program 18 Overload Bypass
When enabled, the unit will transfer to line mode if overload occurs in battery mode.
Program 19 C.V. Charging Voltage
Model #
Default Value
Resettable Range
48V Models
56.4V
48V~58.4V
If user-defined setting (USE/US2) is selected in program 5, this program can be set up.
When the battery is charged to CV setting, the voltage must drop by 2 volts to activate the charger.
Program 20 Float Charging Voltage
Model #
Default Value
Resettable Range
48V Models
54V
48V~58.4V
If user-defined setting (USE/US2) is selected in program 5, this program can be set up
Program 21 Low Battery Cut-Off Voltage
Model #
Default Value
Resettable Range
48V Models
42V/20%
40V~48V/5%-50%
The battery SOC will be displayed when BMS communication is established.
After User-defined (USE/US2) setting is selected in program 5, this program can be set up
Low DC cut-off voltage will be fixed to setting value regardless of load percentage.
When low DC Cut-Off voltage is reached:
1. If battery is the only power source, inverter will shut down.
2. If PV energy and battery power are available, inverter will charge battery without AC output.
3. If PV energy, battery power and utility are all available, inverter will transfer to line mode and provide
output power to loads and charge the battery at the same time.
When low battery voltage protection occurs and qualified PV or AC power inputs, the inverter will
automatically charge and invert DC to AC when the battery voltage reach 54V Or 10% more SOC than low
battery cut off in Lithium mode).
To make it work, the power switch must remain in the original “ON” position.
