LGES-5048 Hybrid Inverter User Manual

LGES-5048 Hybrid Inverter User Manual

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 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.

Note:
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:

Operation Modes Introduction

LGES system normally has the following operation modes based on your configuration and layout.

• Mode Ⅰ
  The energy produced by the PV system is used to optimise self-consumption. The excess energy is used to recharge the batteries, the rest is exported to grid.
  

• Mode Ⅱ
  When there is no PV, and the battery is sufficient, it can supply the load together with grid power.

• Mode Ⅲ
  When grid fails, the system automatically switches to Back-Up mode. The Back Up load can be supported by PV and battery.

• Mode Ⅳ
  Battery could be charged by grid, and charge time/power could be set on LGES PV Master or remotely controlled.

Safety & 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.

Symbols Explanation

Caution!
Failure to observe a warning indicated in this manual may result in injury.
Danger of high voltage and electric shock!
Danger of hot surface!
Components of the product can be recycled.
This side up! The package must always be transported, handled and stored in
such a way as the arrows always point upwards.
No more than six (6) identical packages being stacked on each other
Products should not be disposed as household waste.
Fragile – The package/product should be handled carefully and never be tipped over or slung.
Referto 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

Safety Warning

• 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 the 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 authorisation, otherwise the warranty commitment for the inverter will be invalid.
• Usage and operation of the inverter must follow the instructions in this user manual, otherwise the protection design might be impaired 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 must 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 16.
• In Australia, output of back-up side in switch box should be labeled on “Main Switch UPS Supply”.The output of normal load side in switch box should be labeled “Main Switch Inverter Supply”.

Product Overview

INSTALLATION INSTRUCTIONS

Unacceptable Installations

Please avoid the following installations，which will damage the system or the Inverter.

• For general version, back-up cannot connect in parallel
  For further advance application, please contact after-sales.
  

• One meter cannot be connected to multipe inverters. And different CTs cannot be connected to the same line cable.
  

• One meter cannot be connected to multiple inverters, and different CTs cannot connect to a same line cable.
  

• One battery bank cannot be connected to multiple inverters.
  

• On-Grid or back-up side cannot be connected to any AC generator.
  

• Inverter battery input cannot be connected to incompatible batteries.
  

• Back-up side cannot be connected to grid.

Packing List

Upon receiving the hybrid inverter, please check if any of the components as shown below are missing or broken.

• Inverter

• Wall-Mounted Bracket

• Smart Meter With CT

• Positive PV Plug

• Battery Cover

• Battery Terminal

• Pin Terminal

• Hexagon screw

• Fixed Screw

• PE Terminal

• Expansion Bolts

• WiFi Module

• bluetooth Module

• User Manual

• Quick Installation Instructions

Mounting

Select Mounting Location

For inverter’s protection and convenient maintenance, mounting location for inverter should be selected carefully based on the following rules:

Any part of this system shouldn’t block the switch and breaker from disconnecting the inverter from DC and AC power.

• Rule 1. Inverter should be installed on a solid surface, where it is suitable for inverter’s dimensions and weight.

• Rule 2. Inverter should be installed vertically or lie on a slope by a max of 15°.
  

• Rule 3. Ambient temperature should be lower than 45°C. (High ambient temperature will cause power de-rating of inverter.)

• Rule 4. The inverter installation should be protected under shelter from direct sunlight or bad weather like snow, rain, lightning etc.
  

• Rule 5. Inverter should be installed at eye level for convenient maintenance.

• Rule 6. Product label on inverter should be clearly visible after installation.

• Rule 7. Leave enough space around the inverter according to the below figure.
  

Inverter cannot be installed near flammable, explosive or strong electro- magnetic equipment.

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 surface only.

• Step 1
  Please use the mounting bracket as a template to drill 4 holes in the right positions (10mm in diameter,and 80mm in depth).
  Use expansion bolts in accessory box and fix the mounting bracket onto the wall tightly
  
  Note: Bearing capacity of the wall must be higher than 30kg.

• Step 2
  Carry the inverter by holding the heatsink on two sides and place the inverter on the mounting bracket.
  

• Step 3
  Ground cable shall be connected to ground plate on grid side.
  

• Step 4
  Inverter could be locked for anti-theft purposes if required.
  

Electrical Wiring Connection

PV Wiring Connection

Before connecting PV panels/strings to inverter, please make sure requirements are followed as below:

• The total short-circuit current of PV string must not exceed inverter’s max DC current.
• The minimum isolation resistance to ground of the PV string must exceed 19.33kΩ in case of any shock hazard.
• PV string must not connect to earth/grounding conductor.
• Use the right PV plugs in the accessory box. (BAT plugs are similar to PV plugs, please confirm before use it.)

Note: There will be MC4 plugs in accessory box. The details of connections are as below.

Step 1

• Prepare PV cables and PV plugs.
  

Note:

1. Please use PV plugs and connectors from accessory box.
2. PV cable should be standard 2.5-4mm.

Step 2

• Connect PV cables to PV connectors.

Note:

1. PV cables must be tightly crimped into the connectors.
2. There will be a click sound if connectors are inserted correctly into PV plugs.

Step 3

• Screw the cap on and plug it onto inverter side.
  Note: There will be a click sound if connectors are inserted correctly into PV plugs.
  

Reversing the polarity of PV strings could cause damage to the inverter.

Battery Wiring Connection

Please be careful about any electric shock or chemical hazard.

Make sure there is an external DC breaker (125A) connected to the battery circuit.

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.

Battery cables requirement as Figure 2.4.2-1.

Battery wiring connection process

• Step 1
  Prepare battery cables and accessories and put battery power cable through battery cover.
  
  Note:

1. Please use accessories from accessory box.
2. Battery power cable should be 35mm2.

• Step 2
  Make battery terminals

  • Strip cable coat, revealing 10mm length of metal core.
  • Use special crimper to compress battery terminal tightly

• Step 3
  Connect battery terminal onto inverter .
  
  Note:
  Please make sure polarity (+/-) of battery are not reversed.

• For the compatible LG RESU batteries, please refer to battery connection in LGES-5048 QUICK INSTALLATION INSTRUCTIONS.

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.
  When charge/discharge current limitation protection happens:

•  Battery charge/discharge operation could be abnormal.

• Under grid outage condition, Back-up supply will shutdown.

• It is not allowed to use the inverter in a pure off-grid scenario.

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.

On-Grid & Back-Up Connection

An external AC breaker is needed for on-grid connection to isolate from grid when necessary. The requirements of on-grid AC breaker are shown below.

Note: The absence of AC breaker on back-up side will lead to inverter damage if an electrical short circuit happens on back-up side.

1. Use separated AC breaker for individual inverter.
   

2. On the AC side, the individual breaker should be connected between inverter and Grid but before loads.
   

AC cable is required to connect to both on-grid and back-up side.

Make sure the inverter is totally isolated from any DC or AC power before connecting 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.

Step 1

Prepare the terminals and AC cables according to the right table.

Step 2

Put AC cable through terminal cover as shown in the figure.

Note: Please use the terminals in accessory box.

Step 3

Press the 6 connectors on cable conductor core tightly.
Note: Make sure cable jacket is not locked within the connector.

Step 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 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 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 operation.
• 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-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.

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-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)

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.

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.
   

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”.

Smart Meter & CT Connection

Make sure AC cable is totally isolated from AC power before connecting Smart Meter & CT.

The Smart Meter with CT in product box is compulsory for LGES system installation, used to detect grid voltage and current direction and magnitude, further to instruct the operation condition of LGES inverter via RS485 communication.

Note:

1. The Smart Meter with CT is well configured, please do not change any setting on Smart Meter.
2. One Smart Meter can only be used for one LGES series inverter.
3. If LGES is used in a three-phase grid with a three-phase smart meter, the there 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

• For Single phase Grid
  

• For Three phase Grid
  
  CT A connect to L1
  CT B connect to L2
  CT C connect to L3

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)

Detailed Pin Function Of Each Port On ES

BMS： CAN communication is configured by default. If 485 communication is used, please contact after-sales to replace with the corresponding communication line.

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

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:

Step 1

Screw this plate off from the inverter.
Note: DRED should be connected through “DRED Port” as the figure shows.

Step 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.

Step 3-1 For DRED

1. Put DRED cable through the plate.
2. Connect DRED cable on the 6-pin terminal.The function of each connection position is shown as below.

Step 3-2 For Remote Shutdown

1. Put the cable through the plate.
2. Wiring from the No. 5 and 6 holes respectively.

Step 4

Connect DRED terminal to the right position onto the inverter.

WiFi Module Connection

The Wi-Fi communication function is only applied to WiFi Module, please refer to the digram below to install the Wi-Fi module.

The detailed configuration instruction can be referred to “3.1 Wi-Fi Configuration” in this manual or “LGES-5048 Quick Installation Instruction” in the accessory box.

Earth Fault Alarm Connection

LGES-5048 inverter complies with IEC 62109-2 13.9. Fault indicator LED on inverter cover will light up and the system will email the fault information to customer.
Inverter should be installed at eye level for convenient maintenance.

RESU Home Monitor

RESU Home Monitor is an online monitoring system. After completing the installation of communication connection, you can access www.lgresuhomemonitor.com
Please contact after-sales for more operation of RESU Home Monitor.

Wiring System for LGES-5048 Hybrid Inverter

Note: This diagram indicates wiring structure of inverter, not the electric wiring standard.

System Connection Diagram

Note: According to Australian requirements, the neutral cable of on-grid side and back-up side must be connected together, otherwise back-up function will not work

SYSTEM OPERATION

Wi-Fi Configuration

This part shows configuration on web page. You can also complete the configuration with LGES PV Master. Wi-Fi configuration is absolutely necessary for online monitoring and maintenance.

Preparation:

1. Inverter must be powered up with battery or grid power.
2. Router with available internet access to the website www.lgresuhomemonitor.com is required.

Step 1

1. Connect Solar-WiFi to your PC or smart phone ( its named the last 8 character of the inverter’s serial No.)； Password：12345678.
2. Open browser and login 10.10.100.253 Admin (User): admin; Password: admin.
3. Then click “OK”.
   

Step 2

1. Click “Start Setup” to choose your router.

2. Then click “Next”.

Step 3

1. Fill in the password of other router, then click “Next”.
   

2. Click “Complete”
   

Note:

1. Please make sure the password, Encryption method / algorithm is the same as the router’s.
2. If everything is right well, the Wi-Fi LED on inverter will change from double blink to quadruple blink then to solid status, which means Wi-Fi has connected to the server successfully.
3. Wi-Fi configuration could also be done on LGES PV Master, details please check on LGES PV Master

Wi-Fi Reset & Reload

Wi-Fi reset means restarting Wi-Fi module. Wi-Fi settings will be reprocessed and saved automatically. Wi-Fi Reload means setting Wi-Fi module back to default factory setting.

Wi-Fi Reset

• Short press reset button.
• Wi-Fi LED will blink for a few seconds.

Wi-Fi Reload

• Long press reset button (longer than 3s).
• Wi-Fi LED will double blink until Wi-Fi configuration again.

Note:

Wi-Fi reset & reload function is only used when:

1. Wi-Fi loses connection to internet or cannot connect to LGES PV Master successfully.
2. Cannot find “Solar-WiFi signal” or have other Wi-Fi configuration problems.
3. Please do not use this button if Wi-Fi monitoring works well.
4. If you need to replace the module,please use the unlock tool.

LGES PV Master

LGES PV Master is an external monitoring/ configuration application for hybrid inverters, used on smart phones or tablet for both Android and iOS system.

1. Edit system configuration to make the system work as customer needs.
2. Monitor and check the performance of the hybrid system. please download “LGES PV Master Operation Introduction” at http://www.lgessbattery.com/au/home-battery/product-info.lg

OTHERS

Error Messages

The error messages below will be displayed on LGES PV Master or reported by e-mail if an error occurs.

1. Check (use multi-meter) if AC side has voltage . Make sure grid power is available.
2. Make sure AC cables are connected tightly and well.
3. If all is well, please try to turn off AC breaker and turn on again in 5 mins.

VAC Failure| Grid voltage is not within permissible range| Inverter detects that AC voltage is beyond the normal range required by the safety country|

1. Make sure safety country of the inverter is set right.

2. Check (use multi-meter) if the AC voltage (Between L & N) is within a normal range (also on AC breaker side)
   a. If the AC voltage is high, then make sure the AC cable complies with that required on user manual and the AC cable is not too long.

3. If the voltage is low, make sure the AC cable is connected well and the jacket of the AC cable is not compressed into the AC terminal.

Make sure the grid voltage of your area is stable and within normal range.

FAC Failure| Grid frequency is not within permissible range| Inverter detects that the grid frequency is beyond the normal range required by the safety country|

1. Make sure  the safety country of the inverter is set right.
2. If safety country is right, then please check on the inverter display if AC frequency (Fac) is within a normal range
3. If FAC failure only appears a few times and is resolved soon, it should be caused by occasional grid frequency unstability.

Over Temperature| Temperature inside of the inverter is too high| The inverter’s working environment leads to a high temperature condition|

1. Try to decrease surrounding temperature.
2. Make sure the installation complies with the instruction on inverter user manual.
3. Try to close the inverter for 15 mins, then start up again.

Isolation Failure| ISO failure could be caused by multiplereasons like PV panels are not grounded well, DC cable is broken, PV panels are aged or surrounding humidity is comparatively higher, etc.| Isolation failure could be caused by multiple reasons like that the PV panels are not grounded well, DC cable is broken, PV panels are aged or surrounding humidity is comparatively heavy, etc.|

1. Use multi-meter to check if the resistance between earth & inverter frame is close to zero. If it’s not, please ensure that the connection is well
2. If the humidity is too high, isolation failure may occur.
3. Check the resistance betwen PV1+/PV2+/BAT+/PV- to earth.If the resistance is lower than 33.3k, check the system wiring connection.
4. Try to restart the inverter.Check if the fault still occurs. If not, it means it is caused by an occasional situation, or contact after-sales.

Ground Failure| Ground leakage current is too high| Ground failure could be caused by multiple reasons like that the neutral cable on the AC side is not connected well or the surrounding humidity is comparatively heavy, etc.| Check (use multi-meter) if there is voltage (normally should be close to 0V) between earth & inverter frame. If there is a voltage, it means the neutral & ground cables are not connected well on the AC side. If it happens only in the early morning/dawn /rainy days with higher air humidity and is recovered soon, it should be normal.
Relay Check Failure| Self checking of relay failure| Neutral & ground cables are not connected well on AC side or just an occasional failure| Check (use multi-meter) if there is high voltage (normally should be lower than 10V) between N & PE cable on the AC side. If the voltage is higher than 10V, it means the Neutral & ground cable are not connected well on AC side or restart inverter.
DC Injection High| /| The inverter detects a higher DC component in AC output| Try to restart the inverter,check if it still occurs.If not,it is just an occasional situation.Otherwise, contact after-sales immediately.
EEPROM R/W Failure| /| Caused by a strong external magnetic field etc.| Try to restart the inverter,check if it still occurs.If not,it is just an occasional situation.Otherwise, contact after-sales immediately.
SPI Failure| Internal communication fails| Caused by a strong external magnetic field etc.| Try to restart the inverter,check if it still occurs.If not,it is just an occasional situation.Otherwise, contact after-sales immediately.
DC Bus High| BUS voltage is over-high| /| Try to restart the inverter,check if it still occurs.If not,it is just an occasional situation.Otherwise, contact after-sales immediately.
Back-Up Overload| Back-up side is overloaded| Total back-up load power is higher than the back-up nominal output power| Decrease back-up loads to make sure the total load power is lower than back-up nominal output power (please refer to page 11).

Troubleshooting

Please see www.lgessbattery.com/au/home-battery/product- info.lg

Questions & Answers (Q & A)

About Wi-Fi Configuration

*Q: Why can’t I find the Solar-WiFi signal on mobile devices?**

A: Normally Solar-WiFi* signal can be found right after inverter has powered up. But Solar-Wi- Fi signal will disappear when LGES connects to internet. If changes to the setting are required, connect to the router for change. If you can’t find the WiFi signal or connect to the router, then please try to reload Wi-Fi (please refer to User manual page 18).

*Q: Why can’t I connect Solar-WiFi signal on my phone?**

A: The Wifi module can only connect to one device at a time. If the signal is already connected to another device at the time for some reason, you cannot connect to the signal.

Q: Why does the Wi-Fi module fail to connect to network after I choose the right router hotspot and enter the right passwords?

A: It’s possible that there are special characters not supported by module in the hotspot passwords. Please modify the password to consist of only Arabic numerals or uppercase /lowercase letters.

About Battery Operation

Q: Why does the battery not discharge when grid is not available, while it discharges normally when grid is available?

A: On the App, off-grid output and back-up function should be turned on to make battery discharge under off-grid mode.

Q: Why is there no output on back-up side?

A: For back-up supply, the “Back-Up Supply” on LGES PV Master must be turned on. Under off-grid mode or when grid power is disconnected, “Off-Grid Output Switch” function must be turned on as well.

Note: When turning “Off-Grid Output Switch” on, don’t restart inverter or battery, otherwise the function will be switched off automatically.

Q: The battery cannot be fully charged to 100%?

A: Battery will stop charging when battery voltage reaches charge voltage set on LGES PV Master.

Q: Why does the battery switch always trip when it starts up (RESU battery)?

A: The switch of RESU battery normally trips because of following reasons:

1. Battery DIP switches not set correctly
2. BMS communication fails. (10 minute delay to trip)
3. Battery Voltage is too low (<35V), battery trips to protect itself.
4. An electrical short-cut happened on battery connection side. Or for other reasons please contact after-sales.

Q: Which battery should I use for LG?

A: LG Energy Solution RESU6.5, RESU10, RESU12, RESU13 (end of line)

About LGES PV Master Operation and Monitoring

Q: Why can’t I save settings on LGES PV Master?

A: It could be caused by losing connection to Solar-WiFi *.

1. Make sure you have already connected Solar-WiFi (make sure no other devices connected) or router (if connected Solar-WiFi to router). App’s homepage shows connection well.
2. Make sure you restart inverter 10mins after you change some settings because inverter will save settings every 10 mins under normal mode. We recommend to change setting parameters when inverter is in wait mode.

Q: Why are the data displayed on the homepage different from the parameter page, like charge/discharge, PV value, load value or grid value?

A: The data refresh frequency is different, so there will be a data inconformity between different pages on the App as well as between these on portal and App.

Q: Some columns show NA, like battery SOH, etc. Why does that happen?

A: NA means App does not receive data from inverter or server because of communication problem, such as battery communication, and communication between inverter and the App

About Smart Meter and Power Limit Function

Q: How to activate output power limit function?

A: The function can be realised as follows:

1. 1.Make sure Smart Meter connection and communication is functioning.
2. Turn on export power limit function and set the max output power to grid on App.

Note: Even if output power limit is set to 0W, there might still be a deviation of a max of 100W exporting to grid.

Q: Why is there still power exporting to grid after I set power limit as 0W?

A: Export limit can be 0W theoretically, but there can be a measurement deviation of around 50-100W.

Q: Can I use other brand meter to take over Smart Meter in LG system or change some settings on Smart Meter?

A: Generally, no, because the communication protocol is integrated into inverter and Smart Meter, other brand meters cannot communicate. Also any manual setting change could cause Meter communication failure. An exception is when using an LG Energy Solution approved meter for VPP operations.

Q: What is the maximum current allowed to go through CT on Smart Meter?

A: The max current for CT is 120A.

Other Questions

Q: Is there a quick way to make the system work?

A: For the shortest way, please refer to “LGES-5048 Quick Installation Instructions” and “LGES PV Master Instruction”.

Q: What kind of load can I use to connect on back-up side?

A: Please refer to user manual

Q: Will the warranty of the inverter still be valid if for some special conditions we cannot 100% follow the user manual instructions on the installation or operation?

A: Normally we still provide technical support to problems caused from disobeying the instructions on the user manual, however we cannot guarantee any replacements or returns. So if there is any special conditions where you cannot 100% follow the instructions, please contact after-sales for suggestions.

Disclaimer

The LGES-5048 inverter is transported, used and operated under environmental and electrical conditions. Manufacturer has the right not to provide after- sales services or assistance under following conditions:

• Inverter is damaged during transfer.
• Inverter is out of warranty year and extended warranty is not bought.
• Inverter is installed, refitted or operated in improper ways without authority from manufacturer.
• Inverter is installed or used under improper environment or technical condition mentioned in this user manual, without authority from manufacturer.
• Installation or configuration of the inverter does not follow requirements mentioned in this user manual.
• The inverter is installed or operated against the requirements or warnings that are mentioned in this user manual.
• Inverter is broken or damaged by any force majeure like lightning, earthquake, fire hazard, stormand volcanic eruption etc.
• Inverter is disassembled, changed or updated on software or hardware without authority from manufacturer.
• Inverter is installed, used or operated against any related items in international or local policies or regulations.
• Any non-compatible batteries, loads or other devices connected to inverter

Note: Manufacturer will keep the right to explain all the contents in this user manual. To ensure IP65, inverter must be sealed well, please install the inverters within one day after unpacking, otherwise please seal all unused terminals / holes, unused terminals / holes are not allowed to be kept open, confirm that there is no risk of water or dust entering the terminals / holes.

Maintenance

The inverter requires periodical maintenance, details are shown below:

• Make sure inverter is totally isolated from all DC and AC power for at least 5 mins before maintenance.
• Heat sink: Please use clean towel to clean up heat sink once a year.
• Torque: Please use torque wrench to tighten AC and DC wiring connection once a year.
• DC breaker: Check DC breaker regularly, active the DC breaker 10 times in a row once a year.
• Operating DC breaker will clean contacts and extend lifespan of DC breaker.

Technical Parameters

Battery Inpu*t1 Data

Battery Type

| Li-Ion
Nominal Battery Voltage (V)| 48
Max. Charging Voltage (V)| ≤60 (Configurable)
Max. Charging Current (A)1| 100
Max. Discharging Current (A)1| 100
Max. Charging/Discharging power (W)| 4600
Nominal Battery Capacity(Ah)| 126~252
Charging Mode for Li-Ion Battery| Self-adaption to BMS
PV String Input Data|
Max. DC Input Power (W)| 6500
Max. DC Input Voltage (V)| 580
MPPT Range (V)| 125~550
Start-up Voltage (V)| 125
Min. Feed-in Voltage(V)2| 150
MPPT Range for Full Load (V)| 215~500
Nominal DC Input Voltage (V)| 360
Max. Input Current (A)| 11/11
Max. Short Current (A)| 13.8/13.8
No. of MPP Trackers| 2
No. of Strings per MPP Tracker| 1
AC Output Data (On-grid) 7|
Nominal Apparent Power Output to Utility Grid (VA）| 5000
Max. Apparent Power Output to Utility Grid (VA)| 5000
Nominal Apparent Power from Utility Grid (VA)| 9200
Max. Apparent Power from Utility Grid (VA)| 9200
Nominal Output Voltage (V)| 230
Nominal Output Frequency (Hz)| 50/60
Max. AC Current Output to Utility Grid (A)| 24.5
 |
Max. AC Current From Utility Grid (A)

Output Power Factor

| ~1 (Adjustable from 0 40eading to 0.8 lagging)

.8 l

Output THDi (@Nominal Output)| <3%
AC Output Data (Back-up)|
Back-up Nominal apparent power (VA)| 4600
Max. Output Apparent Power (VA)|
Peak Output Apparent Power (VA)| 6900, 10sec
*4 Max. Output Current (A)| 20
Nominal Output Voltage (V)| 230 (±2%)
Nominal Output Frequency (Hz)| 50/60 (±0.2%)
 |
Output THDv (@Linear Load)| <3%

1. The actual charge and discharge current also depends on the battery.
2. When there is no battery connected, inverter starts feeding in only if string voltage is higher than 200V.
3. 4600 for VDE 0126-1-1 &VDE-AR-N4105 &NRS 097-2-1, 5100 for CEI 0-21.
4. Can be reached only if PV and battery power is enough.
5. CAN communication is configured by default. If 485 communication is used, please replace the corresponding communication line.
6. Not all certifications & standards listed, ch

Efficiency

Max. Efficiency

| 97.60%
Max. Battery to Load Efficiency| 94.00%
Europe Efficiency| 97.00%
MPPT Efficiency| 99.90%
Protection|
Anti-islanding Protection| Integrated
PV String Input Reverse Polarity Protection| Integrated
Insulation Resistor Detection| Integrated
Residual Current Monitoring Unit| Integrated
Output Over Current Protection| Integrated
Output Short Protection| Integrated
Output Over Voltage Protection| Integrated
General Data|
Operating Temperature Range (℃)| -25~60
Relative Humidity| 0~95%
Operating Altitude (m）| 3000
Cooling| Natural Convection
Noise (dB)| <25
User Interface| LED & APP
Communication with BMS5| RS485; CAN
Communication with Meter| RS485
Communication with Portal| Wi-Fi
Weight (kg)| 30
Size (WidthHeightDepth mm）| 516440184
Mounting| Wall Bracket
Protection Degree| IP65
Standby Self Consumption (W)| <13
Topology| Battery Isolation
Certifications & Standards6|
VDE-AR-N 4105;
Grid Regulation Safety Regulation| VDE 0126-1-1
EN 50549-1;G99,G100;
CEI 0-21;AS/NZS4777.2
NRS 097-2-1;
IEC62109-1&2, IEC62040-1
 | EN61000-6-3, EN61000-6-4
EMC| EN 61000-4-16, EN 61000-4-18,
EN 61000-4-29

Other Test

For Australian requirements, in the THDi test, Zref should be added between inverter and mains.
RA, XA for Line conductor
RN, XN for Neutral conductor
Zref:
RN=0, 16; XN=j0,10 at 50Hz

References

• Product Info｜LG Home Battery
• LG Home Battery | Australia | Solar Home Battery
• LG Home Battery | Australia | Solar Home Battery
• LG ESS Battery｜USA
• LG RESU HOME
• LG RESU HOME

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