● The pure o-grid ESS supports only the SUN2000-(2KTL-6KTL)-L1 and
SUN2000-(8K, 10K)-LC0 series.
● The SUN2000-(3KTL-10KTL)-M1 and SUN2000-(12K-25K)-MB0 cannot work
in the pure o-grid mode.
Figure 4-15 O-grid ESS (dashed boxes indicate optional components)
(A) PV string (B) DC switch (C) SUN2000
(D) AC switch (E) ACDU (H) LUNA2000
(I) 4G Smart Dongle (J) WLAN-FE Smart Dongle (K) Router
(L) FusionSolar management
system
(M) FusionSolar app (N) Load
indicates a power cable, indicates a signal cable, indicates
wireless communication.
4.3.2 Setting the Grid-tied and O-grid ESS Mode
The inverter works in o-grid mode. When the sunlight is sucient, the ESS
supplies power to loads and stores surplus PV energy in batteries. When the
sunlight is insucient or there is no sunlight, the batteries discharge to supply
power to loads. By default, the charge cuto capacity of Huawei LUNA2000
batteries is 100% and the discharge cuto capacity is 5%. For details about how
to change the charge or discharge cuto capacity, see 7.3 Battery
Commissioning. In o-grid mode, you need to set the o-grid power grid code
(Island-Grid) on the Quick setting screen.
LUNA2000-(5-30)-S0
User Manual 4 Application Scenarios and Settings
Issue 15 (2024-01-12) Copyright © Huawei Digital Power Technologies Co., Ltd. 57
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