opti-solar Sp4000 Premium, User Manual

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When PV power is not available:
1.
1
st
Grid, 2
nd
Battery: Grid will provide power to the load 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 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.
Off-Grid (III)
PV energy supply priority setting: 1
st
Load, 2
nd
Battery
PV power will provide power to load first and then charge battery. Feed-in to
the grid is not allowed under this mode. The grid relay is NOT connected in
Inverter mode. That means the transfer time from inverter mode to battery
mode will be about 15ms. If connected load is over 4KW and grid is available,
this inverter will allow grid to provide power to the loads and PV power to
charge battery. Otherwise, this inverter will activate fault protection.
Battery charging source:
1. PV or Grid: If there is remaining PV power after supporting the loads, it will
charge battery first. Only if PV power is not available, grid will charge battery.
2. PV only: It only allows PV power to charge battery.
3. None: It is not allowed to charge battery no matter it’s from PV power or
grid.
NOTE: It’s allowed to set up AC charging duration.