Huawei LUNA2000-5-S0 - 5.1 Checking Before the Installation

Table 4-13 Grid-tied and o-grid parameter setting
Parameter Description Value Range
O-grid mode If this parameter is set to Enable, the ESS
switches to the o-grid mode when the grid
fails.
● Enable
● Disable
Backup power
SOC
Sets the backup power SOC. In grid-tied
mode, the battery does not discharge when
it is discharged to the backup power SOC.
When the grid fails, loads are powered in
backup mode. The Backup power SOC
parameter has a higher precedence over the
End-of-discharge SOC parameter. For
example, if the End-of-discharge SOC
parameter is set to 10% and the Backup
power SOC parameter is set to 20%, the
battery stops discharging when the battery
SOC reaches 20%.
[0%, 100%]
Grid-tied/O-
grid mode
switching
If this parameter is set to Automatic
switching, the system switches to the o-
grid mode when the grid fails, and switches
to the grid-tied mode when the grid
recovers.
● Automatic
switching
● Manual
switching
Setting a Working Mode
The grid-tied and o-grid ESS mode can be used together with the self-
consumption or TOU (time-of-use) mode. Enable O-grid mode during site
deployment. For details about how to set the self-consumption or TOU (time-of-
use) mode, see 4.1.2 Setting the Grid-tied ESS Mode.
4.3 Grid-tied and O-grid ESS
The pure o-grid ESS is mainly used in the scenario where there is no grid and the
system operates in pure o-grid mode. The pure o-grid ESS stores the generated
PV energy in batteries and supplies power to loads when the PV energy is
insucient or there is no PV energy at night.
4.3.1 Grid-tied and O-grid ESS Networking
● The pure o-grid ESS consists of the PV strings, LUNA2000 batteries, inverter,
AC switch, and load. In o-grid mode, PV strings and batteries must be
congured.
● The pure o-grid ESS supports only a single inverter and does not support
parallel connection of inverters.
● Optimizer is not supported in the pure o-grid ESS Networking. Otherwise,
the system may fail to start.
LUNA2000-(5-30)-S0
User Manual 4 Application Scenarios and Settings
Issue 15 (2024-01-12) Copyright © Huawei Digital Power Technologies Co., Ltd. 56