Grid-Tied And Off-Grid Ess; Grid-Tied And Off-Grid Ess Networking - Huawei LUNA2000-5-S0 User Manual

LUNA2000-(5-30)-S0
User Manual
Figure 4-10 fully fed to grid

4.2 Grid-tied and Off-grid ESS

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4.2.1 Grid-tied and Off-grid ESS Networking

Networking 1: Single Inverter（Backup Box）
The grid-tied and off-grid ESS consists of the PV strings, LUNA2000 batteries,
inverter, AC switch, load, Backup Box, PDU, Smart Power Sensor and grid. The grid
connection status of the inverter is switched by using the Backup Box.
Issue 15 (2024-01-12)
The grid-tied and off-grid ESS is mainly used to supply power to loads when
the grid is unstable and there are primary loads. The grid-tied and off-grid
ESS switches the inverter to the grid-tied or off-grid state through the Backup
Box. When the grid fails, the inverter switches to the off-grid state and
supplies power to primary loads in backup mode. When the grid recovers, the
inverter switches back to the grid-tied state.
The grid-tied and off-grid ESS must be equipped with batteries. Otherwise,
the off-grid output will be abnormal when the PV voltage is too low.
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