Modes Of Operation; Normal Mode; Fault Mode; Shutdown Mode - Growatt Grid Installation & Operation Manual

C
Connection system : This "interface" between Utility and PV-Inverter may
consist of electrical breaker, fuse and connecting terminals. To comply
with local safety standards and codes, the connection system should be
designed and implemented by a qualified technician.
D
Utility: Referred to as "grid" in this manual, is the way your electric power
company provides power to your place. Please note that Inverter can only
connect to low-voltage sysytems (namely,220_230VAC, 50/60Hz).
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Modes of Operation

There are 3 different modes of operation.

3.1Normal mode

In this mode, Inverter works normally. Whenever the supplied power from PV panel is
sufficient (voltage>90VDC), Inverter converts power to the grid as generated by the
PV panel. If the power is insufficient, (voltage<70DC) Inverter enters a "waiting"
state. Whilst "waiting" Inverter uses just enough power from the PV panel monitor
internal system status. In normal mode the LED is green.
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3.2 Fault mode

The internal intelligent controller can continuously monitor and adjust the system
status. If Inverter finds any unexpected conditions such as grid problems or internal
failure, it will display the information on its LCD and the LED will be red.

3.3 Shutdown mode

During periods of little or no sunlight, Inverter automatically stops running. In this
mode, Inverter does not take any power from the grid. The display and LED's on the
front panel do not work.
Notes
Operating inverter is quite easy. During normal operation, Inverter runs
automatically with DC switch on. However, to achieve maximum conversion
efficiency of Inverter please read the following information:
a
Automatic ON-OFF:
With DC switch on, Inverter starts up automatically when DC-power from the PV
panel is sufficient.
Once the PV - Inverter starts it enters one of the following 3 states:
1.Standby: The PV string can only provide just enough voltage to minimum
requirements of the controller.
2.Waiting: When the PV string DC voltage is greater than 70V, Inverter enters a
"waiting" state and attempts to connect to the grid.
3.Normal operation: When PV string DC voltage is greater than 90V, Inverter
operates in the normal state.
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