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Off-Grid (II)
PV energy supply priority setting: 1
st
Battery, 2
nd
Load
PV power will charge battery first. After battery is fully charged, if there is
remaining PV power left, it will provide power to the load. Feed-in to the grid is not
allowed under this mode. At the same time, the grid relay is connected in Inverter
mode. That means the transfer time from inverter mode to battery mode will be
less than 15ms. Besides, it will avoid overload fault because grid can supply load
when connected load is over rated output capacity of the inverter.
Battery charging source:
1.
PV or Grid: If there is remaining PV power after supporting the loads, it will
charge battery first. Only until PV power is not available, grid will charge battery.
2.
PV only: It is only allow PV power to charge battery.
3.
None: It is not allowed to charge battery no matter it’s PV power or grid.
NOTE: It’s allowed to set up AC charging duration.
Load supply source:
When PV power is available: 1
st
PV, 2
nd
Grid, 3
rd
Battery
PV power will provide power to the load first. If it’s not sufficient, grid will provide
power to the load. If grid is not available at the same time, battery power will back
up.
When PV power is not available:
1.
1
st
Grid, 2
nd
Battery: Grid will provide power to the load at first. If grid is not
available, battery power will provide power backup.
2.
1
st
Battery, 2
nd
Grid: Battery power will provide power to the load at first. If
battery power is running out, grid will back up the load.
NOTE: This option will become ineffective during AC charging time and the priority
will automatically become 1
st
Grid and 2
nd
Battery order. Otherwise, it will cause
battery damage.
