LG LGES-5048 User manual

LGES-5048
LGES-5048-NS
Hybrid Inverter
User Manual

2
TABLE OF CONTENTS
01 Introduction ..............................................................1
1.1 Operation Modes Introduction................................................................1
1.2 Safety and Warning...................................................................................2
1.3 Product Overview ......................................................................................4
02 Installation Instructions .............................................6
2.1 Unacceptable Installations.......................................................................6
2.2 Packing List ................................................................................................6
2.3 Mounting ....................................................................................................7
2.3.1 Select Mounting Location .................................................................................7
2.3.2 Mounting ............................................................................................................8
2.4 Electrical Wiring Connection ....................................................................9
2.4.1 PE Cable Connection ......................................................................................... 9
2.4.2 PV Wiring Connection .....................................................................................10
2.4.3 Battery Wiring Connection .............................................................................11
2.4.4 On-Grid&Back-up Connection........................................................................12
2.4.5 Smart Meter & CT Connections .....................................................................15
2.5 DRED & Remote Shutdown Device Connection...................................17
2.6 WiFi & WiFi/LAN Module Connection ....................................................18
2.7 Earth Fault Alarm Connection................................................................18
03 MANUAL OPERATION ................................................ 21
3.1 Wi-Fi Conguration .................................................................................21
3.2 Startup/Shutdown Procedure ................................................................22
3.3 LGES PV Master App................................................................................23
3.4 LG RESU Home Monitor App..................................................................23

3
04 OTHER ..................................................................... 24
4.1 Error Messages........................................................................................24
4.2 Troubleshooting ......................................................................................26
4.3 Disclaimer.................................................................................................28
4.4 Technical Parameters ............................................................................30

1
01 Introduction
LGES-5048 is a hybrid or bidirectional solar inverter, applicable to solar systems connected to the utility
grid and LG Energy Solution RESU 48V batteries. The Inverter should not be installed in
multiple phase combinations
The energy produced by the PV system is used to power household loads, charge the battery, and
export excess energy to the utility grid. When household loads exceed PV production, the battery is
discharged to support the loads and minimize utility grid import.
With the optional addition of remote control, such as Virtual Power Plant (VPP) participation, the
inverter and battery combination can further optimise energy usage according to price signals.
The introduction describes a general working situation of the
LGES system. The operation mode can be adjusted
on LGES PV Master App up to the system layout. The general
operation modes are as below:
1.1 Operation Modes Introduction
LGES-5048 system normally has the following operation modes based on your configuration and
layout conditions.
Mode I
The energy produced by the PV system is used to
optimize self-consumption needs. The excess energy
is used to recharge the batteries, any remaining
excess is then exported to the grid.
Mode III
When grid fails, the system will automatically
switches to back-up mode. The back-up loads can
be supplied by both PV and battery energy.
Mode II
When there is no PV, and the battery is
sufficient, it can supply the load together with
grid power.
Mode IV
Battery could be charged by grid, and charge
time/power could be set on LGES PV Master
or remotely controlled.

2
1.2 Safety and Warning
LGES-5048 from LG Energy Solution Ltd strictly complies with related safety rules for product design
and testing. Please read and follow all the instructions and cautions on the inverter or user
manual during installation, operation or maintenance. Improper operation might cause personal
or property damage.
Symbol Explanation
Danger - high voltage and electric shock!
Caution!
Failure to observe any warnings contained in this manual may result in injury.
Danger - hot surface!
The components of the product can be recycled.
This side up! This package must always be transported, handled and stored in such a way
that the arrows always point upwards.
No more than six (6) identical packages being stacked on each other.
Products shall not be disposed as household waste.
5min
Fragile - The package/product should be handled carefully and never be tipped over or
slung.
Refer to the operating instructions.
Keep dry! The package/product must be protected from excessive humidity and must be
stored under cover.
This symbol indicates that you should wait at least 5mins after disconnecting the inverter from
the utility grid and from the PV panel before touching any inner live parts.
CE mark.

3
Installation and operation of the inverter must be performed by qualified electricians, in compliance
with all local standards, wiring rules and requirements of local grid authorities, e.g. AS 4777 and
AS/NZS 3000 in Australia.
Before any wiring connection or electrical operation on inverter, all battery and AC power must be
disconnected from inverter for at least 5 minutes to make sure inverter is totally isolated to avoid
electric shock.
The temperature of inverter surface might exceed 60℃ during operation, so please make sure it
has cooled down before touching it, and make sure the inverter is out of reach of children.
Do not open the inverter's cover or change any components without manufacturer's authorization,
otherwise the warranty commitment for the inverter will be invalid.
Usage and operation of the inverter must follow instructions in this user manual, otherwise the
protection design might be impared and warranty commitment for the inverter will be invalid.
Appropriate methods must be adopted to protect inverter from static damage. Any damage caused
by static is not warranted by manufacturer.
PV negative (PV-) and battery negative (BAT-) on inverter side is not grounded as default design.
Connecting PV- to EARTH is strictly forbidden.
PV modules used on the inverter must have an IEC61730 class A rating, and the total open-circuit
voltage of PV string/array is lower than the maximum rated DC input voltage of the inverter. Any
damage caused by PV over-voltage is beyond warranty.
The inverter, with built-in RCMU, will exclude possibility of DC residual current to 6mA, thus in the
system an external RCD (type A) can be used(≥30mA).
In Australia, the inverter internal switching does not maintain neutral integrity, which must be
addressed by external connection arrangements like in the system connection diagram for Australia
on page 17
In Australia, output of back-up side in switchbox should be labeled on "Main Switch UPS Supply".
The output of normal load side in switch box should be labeled "Main Switch Inverter Supply".
Safety Warnings

4
1.3 Product Overview
If the inverter is not equipped with a DC switch (LGES-5048-NS), an external DC breaker shall be
added. The external DC breaker shall be AU/NZ certified; Complied to AS60947.3:2018; Be classified
as DC-PV 2; With ratings and properties suitable for the intended application conditions such as
outdoor, exposed to sunshine, on non-combustible material surface.
1. Battery Terminal
(BATTERY +/-) 2. PV Input Terminal (PV1/ PV2) 3. DC Switch (optional)
4. DC Switch Locking Hole 5. Communication Module
Port (WiFi or LAN) 6. METER Communication
Port
7.
DRED or Remote
Shutdown
Communication Port
8. BMS Communication Port 9. RS485 Communication
Port
10. Reserved Port 11. AC Terminal (ON-GRID and
BACKUP) 12. Indicators
13. Mounting Plate 14. Heat Sink 15. PE Terminal
13 14 15
10 11
9
8
76
5
4
32
1
12

5
LED Indicators
Indicator Status Explanation
SYSTEM
ON = System is ready.
BLINK = System is starting.
OFF = System is not operating.
BACK-UP
ON = Back-up is ready / power available.
OFF = Back-up is o / no power available.
SOLAR
ON = Solar inputs #1 and #2 are active.
BLINK 1 = Solar input #1 is active /#2 is not active.
BLINK 2 = Solar input #2 is active /#1 is not active.
OFF = Solar input #1 and #2 are not active.
BATTERY
ON = Battery is charging.
BLINK 1 = Battery is discharging.
BLINK 2 = Battery is low / soc is low.
OFF = Battery is disconnected/not active.
GRID
ON = Grid is active and connected.
BLINK = Grid is active but not connected.
OFF = Grid is not active.
ENERGY
ON = Consuming energy from grid / buying.
BLINK 1 = Supplying energy to grid / zeroing.
BLINK 2 = Supplying energy to grid / selling.
OFF = Grid is not connected or system is not operating.
WiFi
ON = WiFi connected / active.
BLINK 1 = WiFi system resetting.
BLINK 2 = WiFi not connect to router.
BLINK 4 = WiFi server problem.
OFF = WiFi not active.
FAULT
ON = Fault has occurred.
BLINK = Overload of back-up output / reduce load.
OFF = No fault.

6
Smart Meter
Battery
On-Grid Battery Back-Up On-Grid Back-Up
Incompatible battery
Generator
PV PV
Back-Up Back-Up
Load
On-Grid
02 Installation Instructions
2.1 Unacceptable Installations
Please avoid the following installations which will damage the system or the Inverter.
The following installations should be avoided. Any damage caused will not be covered by the warranty
policy.
For the general version, backup cannot connect in parallel.
For advanced applications, please contact our Tech Support
Dept
Single PV string cannot connect to multiple inverters.
One meter cannot be connected to multiple inverters.
Different CTs cannot connect to the same line cable.
The On-Grid or back-up side cannot be
connected to any AC generator directly.
The inverter battery input must not be
connected to incompatible batteries.
The backup side cannot be connected
to the grid.
One battery bank cannot be connected to multiple inverters.
2.2 Packing List
Upon receiving the hybrid inverter, please check if any of the components as shown below are
missing or broken.
PE
Terminal
Expansion
Bolts
Fixed
Screw
Positive PV Plug
or
Battery Cover
or
Negative PV PlugInverter
Documentations
Smart Meter With CT
Wall-Mounted
Bracket
Reset
SMART METER
USB
Battery
Terminal
Pin
Terminal
Hexagon
screw
WiFi
Module
Bluetooth
Module
Clip

7
Rule 4. Ambient temperature should be lower than 45°C. The temperature and humidity at the
installation site should be within the appropriate range (60 °C for outdoor unconditioned with
solar effects).
Rule 5. It is recommended that the installation of the inverter should be prevented from direct sunlight,
snow, rain and other negative influences which may cause function impact or life aging.
Accmulated snow
Keep away
from sunlight Keep dry Keep it clear
of snow Sun Rain
Rule 6. Inverter should be installed at eye level for convenient maintenance.
Rule 7. Product label on inverter should be clearly visible after installation.
Rule 8. Do not install the inverter when it is snowing or raining. If you have to, pay attention to the
waterproof and moisture-proof of the inverter and distribution box.
Rule 9. Leave enough space around the inverter according to the below figure for natural heat
dissipation.
If there is any radio or wireless communication equipment below 30mhz near the inverter,
make sure that:
1. Install the inverter at least 30m far away from the high-precision wireless equipment.
2. Add ferrite core with multi coil winding or low pass EMI filter to the DC cable or AC cable.
300mm
500mm
200mm 200mm
Upward
Downward
Front
Both sides
---------- 300mm
------ 500mm
------------- 300mm
------- 200mm
300mm
2.3 Mounting
2.3.1 Select Mounting Location
For inverter's protection and convenient maintenance, mounting location for inverter should be selected
carefully based on the following rules:
Rule 1. Any part of this system shouldn't block the switch and breaker from disconnecting the inverter
from DC and AC power.
Rule 2. Inverter should be installed on a solid surface, where it is suitable for inverter's dimensions and
weight.
Rule 3. Inverter should be installed vertically or lie on a slope by a max of 15°

8
1
2.3.2 Mounting
Remember that this inverter is heavy! Please be careful when lifting out from the package.
The inverter is suitable for mounting on concrete or other non-combustible surfaces only.
Please use the mounting bracket as a template to drill 4 holes in the correct positions
(10mm in diameter and 80mm in depth).
Use the expansion bolts in the accessory box and tightly attach the mounting bracket to the
wall.
Carry the inverter by holding the heat sink on two sides and place the inverter on the
mounting bracket.
FOR AUSTRALIA ONLY. Lock the DC switch before mounting. Make sure that the DC switch is
locked unless the inverter is powered on.
Note: Bearing capacity of the wall must be higher than 30kg, otherwise it may not be able to
keep the inverter from dropping. wall bracket
expansion pipe
self-tapping screws
228.5mm 228.5mm
117.5mm
104.5mm
400mm
2
3

9
2.4 Electrical Wiring Connection
2.4.1 PE Cable Connection
• Disconnect the PE cable after dismantling the equipment if needed.
• To improve the corrosion resistance of the terminal, it is recommended to apply silica gel or
paint on the ground terminal after installing the PE cable.
• The PE cable should be prepared by customers. Recommended specifications:
• Type:single-core outdoor copper cable.
• Conductor cross-sectional area S≥4mm2.
The inverters can be locked for anti-theft purposes if this is necessary for individual
requirements.
The lock is not included in the package and can be
purchased by the user.
L1
1
23
Copper, ≥4mm2
L=L1+(1~2)mm
M5
1.5~2N·m
4

10
3
MC
MC
2.4.2 PV Wiring Connection
Before connecting PV panels/strings to inverter, please make sure requirements are followed as
below:
• The total short-circuit current of a PV string must not exceed the inverter's max DC current.
• The minimum impedance to earth of the PV module shall be greater than R. R=Max.Input
Voltage (V)/30mA, i.e. R=1100V/30mA=36.7KΩ or R=1000V/30mA=33.4KΩ).
• The PV string must not be connected to the earth/grounding conductor.
• Use the right PV plugs in the accessory box. (BAT plugs are similar to PV plugs. Please check before
using them.)
Note: There are MC4 plugs in the accessory box. The connection details are shown below.
Prepare the PV cables and PV plugs.
Screw the cap on and plug it into the inverter side.
Connect the PV cable to the PV connectors.
Note:
1. Please use the PV plugs and connectors from the
accessory box.
2. The PV cable should be a standard 4–6mm2.
Note: There will be a clicking sound if the connectors are inserted correctly into the PV plugs.
Note:
1. Crimp the PV cable tightly onto the connectors.
2. There will be a clicking sound if the connectors are
inserted correctly into the PV plugs.
4-6mm27mm
4-6mm27mm
1
The polarity of the PV strings must not be connected in a reverse manner. Otherwise, the
inverter could be damaged.
MC4 Series
2

11
For lithium battery (pack) the capacity should be 50Ah or larger. Battery cable requirements are as
following.
You are recommended to refer to the battery user manual as well when selecting the battery cable.
Battery wiring connection process
Grade Description Value
AOutside diameter Insulation 10-14mm
BInsulation section NA
CConductor core section 35mm2
1
2
3
Prepare battery cables and accessories and put
battery power cable through battery cover.
Make battery terminals
• Strip cable coat, revealing 10mm length of metal
core.
• Use special crimper to compress battery terminal
tightly.
Connect battery terminal onto inverter.
Note:
Please make sure polarity (+/-) of battery
are not reversed.
Note:
1. Please use accessories from accessory box.
2. Battery power cable should be 35mm2.
Tightening Torque: 6-8N.m
Pan Head Screw
Screw Cap
Insulator
Battery Terminal
Waterproof Ring
Cable
* For the compatible LG RESU batteries, please refer to battery connection in LGES QUICK
INSTALLATION INSTRUCTIONS.
Please be careful of any electric shock or chemical hazards.
Make sure there is an external DC breaker (125A) connected to the battery circuit.
2.4.3 Battery Wiring Connection
Make sure that the breaker is off and battery is LG Energy Solution RESU 6.5/10/12/13
48V nominal battery only before connecting battery to inverter. Make sure inverter is
totally isolated from PV and AC power.
BA
C

12
Battery Protection
Battery will provide charge/discharge current limitation under the following conditions:
• Battery SOC is lower than I-DOD (Depth of discharge).
• Battery voltage is lower than discharge voltage.
• Battery over temperature protection
• Battery communication is abnormal for lithium battery.
• BMS charge/discharge limitation for lithium.
When charge/discharge current limitation protection happens:
• Under on-grid mode, battery charge/discharge operation could be abnormal.
• Under off-grid mode, Back-Up supply will shut down.
Note:
•The inverter and battery cannot be used in off-grid designs
•Under on-grid mode, battery is protected from over discharge by DOD and discharge voltage.
•The DOD setting of a battery prevents the inverter from discharging battery reserve power. As
soon as the DOD is reached the load of building will only be supported by either PV power or the
grid. If there are continuous days when little or no battery charging occurs, the battery may
continue to self-consume energy to support communications with the inverter.
2.4.4 On-Grid & Back-up Connection
An external AC breaker is needed for on-grid connection to isolate the inverter from the utility grid
when necessary.
The requirements for the on-grid AC breaker are shown below.
Inverter Model AC Breaker Specification
LGES-5048 40A / 230V (e.g. DZ47-60 C40)
LGES-5048-NS 40A / 230V (e.g. DZ47-60 C40)
Note: The absence of AC breaker will lead to inverter damage if an electrical short circuit happens on
grid side.
1. Use separate AC breakers for individual
inverters.
AC breaker AC breaker
AC breaker
AC breaker
Grid
Grid Load
2. On the AC side, an individual breaker
should be connected between the inverter
and grid but before any loads.
Requirement of AC cable connected to On-Grid and Back-Up side.
Make sure the inverter is totally isolated from any DC or AC power before connecting the AC
cable.
Note:
1. Neutral cable shall be blue, line cable shall be black or brown (preferred) and protective earth cable
shall be yellow-green.
2. For AC cables, PE cable shall be longer than N&L cables, so in case that the AC cable slips or is taken
out, the protecting earth conductor will be the last to take the strain.

13
Prepare the terminals and AC cables according to the right table.
Put AC cable through terminal cover as
shown in the figure.
Note: Please use the terminals in accessory
box.
Press the 6 connectors on cable conductor core tightly.
Note: Make sure cable jacket is not locked within the connector.
ABC
D
1
Grade Description Value
A Outside diameter 13-18 mm
B Separated wire length 20-25 mm
C Conductor wire length 7-9 mm
D Conductor core section 4-6 mm2
Cable Single Hole Seal Ring Connection
Terminal
Screw Cap
AC Cover
Insulator
2
3
4
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 the wrong side.
2. Lock the cover and screw the cap.
Tightening torque
2.0-2.5N·m

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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 contact
Technical Support for the special firmware and adjustable methods
Declarations For The Backup Function
The back-up output of LGES hybrid inverters have limited overload ability.
For details please refer to the technical parameters (Page 30).
The inverter has self-protection de-rating at high ambient temperature.
The following statement lays out general policies governing LGES-5048 (&NS).
1. Standard PV installation typically consists of the connection of the inverter with both panels and
batteries. In the case where the system is not connected to the batteries, the back-up function is
strongly not advised for use. Manufacturer shall not cover the standard warranty and 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 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 operation.
• Do not connect the 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 inverter air-
conditioner, 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.
Acceptable Loads Are As Below:
LGES-5048 series 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
against de-rating 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)

15
Note:
For convenient maintenance, please 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.
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.
Declarations For Backup 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 App > Advanced Settings > Click "Reset Backup Overload History".
2.4.5 Smart Meter & CT Connections
Make sure the AC cable is totally isolated from AC power before connecting the Smart Meter
and CT.
A Smart Meter with the CT in product box is compulsory for LGES system installation. It can be
used to detect the grid voltages and current directions, provide the operating condition of the LGES
inverter via RS485 communications.
Note:
1. The Smart Meter with CT is already configured ; please do not change any settings on the Smart Meter.
2. One Smart Meter can be used with only one LGES series inverter.
3. If LGES series inverter is used in a three-phase grid with a three-phase smart meter, the three CTs
must be used for one Smart Meter, and must be connected on the same phase with Smart Meter power
cable.
Smart Meter & CT connection diagram
Back-Up
SP3T
1
2
3
On-Grid
Grid
Load
• For Single Phase Grid
To Smart Meter
CT
Grid
Load
PE
N
L
Grid side
GM1000

16
Note:
1. CT cable is 3m as default, please do not extend.
2. Smart Meter communication cable (RJ45) is attached on the inverter ("To Smart Meter" cable), could
be extended to max 100m, and must use standard RJ45 cable and plug, as below:
3. Single-phase Smart Meter GM1000 is supplied with inverter. For 3-phase grid, use optional GM3000
(available from distributor).
Power Meter Grid
Load
To Smart Meter CT A
CT B
CT C
PE
N
L3
L2
L1
Detailed PIN Functions Of Each Port On The Inverter
BMS: CAN communication is configured by default. If 485 communication is used, please contact the
Technical Support to replace this with the correct communication cable.
• For Three Phase Grid
CT A connect to L1
CT B connect to L2
CT C connect to L3
Position Color BMS
Function
Smart Meter
Function EMS
1 Orange & white 485_A2 NC 485_A
2 Orange NC NC 485_B
3 Green & white 485_B2 485_B1 485_A
4 Blue CAN_H NC NC
5 Blue & white CAN_L NC NC
6 Green NC 485_A1 485_B
7 Brown & white NC 485_B1 NC
8 Brown NC 485_A1 NC
Smart Meter LED Indications
STATUS OFF ON Blinking
POWER Not working Working /
ENERGY / Importing Exporting
COM Single blink when data is transferred to the inverter
POWER
ENERGY
COM
Grid side
GM3000

17
123456
3-1
2.5 DRED & Remote Shutdown Device Connection
DRED (Demand response enabling device) is used for Australia safety requirements. Inverter
integrates control logic and provides an interface for DRED. The DRED is not provided by inverter
manufacturer.
Detailed connection of DRED & Remote Shutdown are shown below.
1Screw this plate off from the inverter.
Note: DRED should be connected through "DRED Port" as the figure shows.
2
1. Plug out the 6-pin terminal and dismantle the
resistor on it.
2. Plug the resistor out, leave the 6-pin terminal
for next step.
Note: The 6-pin terminal in the inverter has the
same function as DRED. Please leave it in the
inverter if no external device is connected.
1. Put DRED cable through the plate.
2. Connect DRED cable on the 6-pin
terminal.
The function of each connection position as
below.
Single hole
seal ring
RS485
communication board
Screw
Cable
Screw Cap
Insulator
Nut
NO 1 2 3 4 5 6
Function DRM1/5 DRM2/6 DRM3/7 DRM4/8 REFGEN COM /DRMO
For DRED