LG LGES-5048 User Manual page 9

Step 4
Screwing torque
2.0-2.5N.m
1. Connect the assembled AC cables into AC terminals with fastening torque about
2.0-2.5N.m.
Note: Connect back-up terminals before connecting on-grid terminals. Make sure it
is not connected to a wrong side.
2. Lock the cover and screw the cap.
Special Adjustable Settings
The inverter has a field where the user can set functions, such as trip points, trip time, time of
reconnection, active and invalid of QU curve and PU curve etc. by special firmware. Please
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contact after-sales for the special firmware and adjustable methods.
Declaration For Back-Up Function
The back-up output of LGES hybrid inverters have limited overload ability.
For details please refer to the technical parameters (Page 29).
The inverter has self-protection de-rating at high ambient temperature.
The following statement lays out general policies governing LGES-5048.
1. Standard PV installation typically consists of the connection of the inverter with both panels and
battery. In the case where the system is not connected to the batteries, the back-up function
should not be used. Connection of back-up function without battery will not be covered by
warranty and installer will be liable for any consequences arising from users not following this
instruction.
2. Under normal circumstances, the back-up switching time is less than 10 ms (the minimal
condition to be considered as the UPS level). However, some external factors may cause the
system to failing on back-up mode. As such, we recommend the users to be aware of conditions
and follow the instructions as below:
• Do not connect loads when they are dependent on a stable energy supply for a reliable opera-
tion.
• DO NOT connect loads which may in total exceed the maximum back-up capacity. Even when
grid is present, this will cause overload .
• Try to avoid those loads which may create very high start-up current surges such as air-condi-
tioner, high-power pump etc.
• Due to the condition of the battery itself, battery current might be limited by some factors
including but not limited to the temperature, weather etc.
Accepted Loads:
LGES-5048 inverter is able to supply a continuous 4600VA output or maintain a 6900VA output less
than 10 seconds on back-up side to support loads. The inverter also has self-protection for de-rat-
ing at high ambient temperature.
• Inductive Load: Maximum 1.5kVA for single inductive load, maximum 2.5kVA for total inductive
load power.
• Capacitive Load: Total capacitive load (like computer, switch power etc.)power ≤3.0kVA. (Any
load with high inrush current at start-up is not accepted)
Note:
For convenient maintenance, it is recommended to install a SP3T switch on back-up and
on-grid side. Then it is adjustable to support load by back-up or by grid or default settings.
Back-Up
1
On-Grid
2
3
Load
SP3T
Declaration For Back-Up Overload Protection
Inverter will restart itself if overload protection triggers. The preparation time for restarting will be
longer and longer (one hour at most) if overload protection repeats. Take following steps to restart
inverter immediately.
Decrease back-up load power within maximum limitation.
On LGES PV Master → Advanced Setting → Click "Reset Back-Up Overload History".
1. Back-up load is supplied from back-up side.
2. Back-up load is isolated.
3. Back-up load is supplied from grid side.
Grid
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