Installation
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Backup Testing Guidelines
After the installation, please check whether the LG ESS Home 8 can provide backup power properly
through the following steps.
* LG ESS Home 8 provides the seamless transition within 100ms.
a
Run the LG ESS Home 8 and make sure the system operates and is not set to “STOP”.
b
To prevent a system malfunction caused by the backup PV inverter, please leave the PV circuit
breaker in the OFF position during this step.
c
Simulate a power outage by turning off the dedicated breaker of the SE Box or the Service
Disconnect Switch.
-
If you turn off the service disconnect switch, the non-backup loads will be powered down.
-
If you turn off the dedicated circuit breaker of the SE Box, the non-backup loads will be still
powered by the utility grid in the partial backup system.
D
Check that the LG ESS Home 8 provides backup power without any faults or errors. If there were
any faults or errors, LG ESS Home 8 will automatically restart within 10 minutes. It may generally
take 2 minutes for a single ESS installation. If the system does not restart within 10 minutes,
please turn on the dedicated breaker of the SE Box or the Service Disconnect Switch and check
the event history.
E
If it works normally, please connect the system to the grid connection by turning on the dedicated
breaker of the SE Box or the Service Disconnect Switch for the grid recovery. It will take around 1
minute.
F
Check that the system operates with the grid connection.
G
Turn on the PV circuit breaker and check the PV generation on the HMI screen.
H
After the PV generation, simulate a power outage again.
I
In the beginning of the backup, the LG ESS Home 8 system shifts AC frequency to block the
PV generation for a stable transition to backup operation. Please check that the PV generation
stopped at the start of the backup operation, and then wait at least 5-8 minutes for PV
generation, depending on the grid profile of the PV inverters.
J
Check that the PV generation and LG ESS Home 8 operate well. Depending on the PV generation
power and the backup load consumption, the LG ESS Home 8 will be charged or discharged to
the backup load.
K
If there were no problems, turn on the dedicated breaker of the SE Box or the Service Disconnect
Switch for grid recovery. It will take about 1 minute.
L
Check that the system operates well with the grid connection.