Grid-Tie
Under this operation mode, PV power only feeds-in to the grid. No priority setting is
available.
Off-Grid
·
Off-Grid (I): Default setting for off-grid mode.
PV energy supply priority setting:
PV power will provide power to the load first and then charge battery. 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 10KW.
1st Load, 2nd Battery
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. (Default)
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.
Load supply source:
When PV power is available:
1. 1st PV, 2nd Battery, 3rd Grid (Default)
PV power will provide power to the load first. If it’s not sufficient, battery power will
provide power to the load. When battery power is running out or not available, grid
will back up the load.
2. 1st PV, 2nd Grid, 3rd 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. 1st Grid, 2nd Battery
Grid will provide power to the load at first. If grid is not available, battery power will
provide power backup.
2. 1st Battery, 2nd Grid (Default)
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 1st Grid and 2nd Battery order. Otherwise, it will cause
battery damage.
Figure 14.7
Figure 14.8
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