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19
Solar and Utility (Default)
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Solar energy and utility will both charge battery. But the solar will have higher priority in charging.
14:OSO
Solar Only
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Solar energy will be the only charger source no matter utility is available or not.
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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 overdischarging.
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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 19: C.V. Charging Voltage
48V model: default 56.4V, 48.0V~58.4V Settable
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If user-defined setting (USE/US2) is selected in program 5, this program can be set up
Program 20: Float Charging Voltage
48V model: default 54.0V, 48.0V~58.4V Settable
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If user-defined setting (USE/US2) is selected in program 5, this program can be set up
Program 21: Low Battery Cut-Off Voltage
48V model: default 42.0V/20%, 36.0V~52.0V/5%-50% Settable.
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The battery SOC will be displayed when BMS communication is established.
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If user-defined setting (USE/US2) is selected in program 5, this program can be set up
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After User-defined (USE/US2) setting is selected in program 5, this program can be set up
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Low DC cut-off voltage will be fixed to setting value regardless of load percentage.
When low DC Cut-Off voltage is reached:
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If battery is the only power source, inverter will shut down.
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If PV energy and battery power are available, inverter will charge battery without AC output.
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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 is 2Vdc higher than low battery cut off
(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.
The minimal voltage for the LCD to illuminate is 30Vdc for 48V models.
For the M6048D and M12048D inverter, the High DC Cut-Off Voltage varies for different type of batteries.
It is 60V for AGM battery, 62V for flood battery, 4 volts higher than the CV voltage in USE or Li Mode.
The inverter will go to high voltage alarm when the battery voltage is reached and go to Fault After 60
seconds.
