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If battery reaches LBCO System will shut down until grid or solar charging sources are
re-established.
12.5 – Grid-Tie
Under this operational mode, PV power only feeds-in to the grid and batteries are not present in the system. A
back-up generator can be wired into the system to provide load support during an outage.
settings available for this selection
12.6 – Off-Grid
Off-Grid settings should only be used if the utility is not present. There are three priority options for
Off-Grid use. Off-grid systems require solar as a generation source and should incorporate a
generator for times in which solar may not be present.
Option 1: Off-Grid (I):
Default setting for off-grid mode
PV Energy Supply Priority Setting: PV will supply energy in the following order:
1. Load
2. Battery
PV power will provide power to the load first and then charge the battery. Feed-in to the
grid is not available under this mode. At the same time, the AC input relay is connected in
Inverter mode. That means the transfer time from inverter mode to battery mode will be
less than 15ms. The inverter can power up to 12kW for 100ms to accommodate start up
surges. This will avoid any overload fault because AC input can supply loads when
connected loads is rated over the output capacity of the inverter for a short duration of
time.
Charging Source: PV Only
1. PV or AC Input- Utilizes Generator or AC Coupled Solar for Charging Support
2. PV Only: Select this mode if off-grid with solar
3. None: Do not select this mode in Off-Grid setting as you will need some generation/charging
source.
Load Supply Source: Loads will be supported in the following order:
1. PV
2. Battery
3. AC
PV will provide power to the loads first. If PV is not sufficient to support the loads the battery
will support the load. If the battery reaches LBCO or cannot support the load, a generator
can be utilized to provide additional power to support loads and charge battery. When PV
power is unavailable (nighttime), battery will supply the load first. If the battery reached
LBCO, the system will power down until an energy source returns and begins supplying the
inverter.
Option 2: Off-Grid (II)
PV energy supply priority setting:
1. Battery
2. Load
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There are no priority
REV2022007071630
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