LG RESU 6.4 EX User manual

Residential Energy Storage Unit
6.4 EX Battery Pack
For Photovoltaic Systems
Installation Manual
April 2015 | Edition 1

This manual describes how to safely install the RESU®6.4 EX battery pack
from LG Chem.
Read this manual thoroughly before you attempt to install the product, and
follow the instructions carefully throughout the installation process.
If you are uncertain about any of the requirements, recommendations, or safety
procedures described in this manual, contact LG Chem immediately for advice
and clarication.
NOTE
The information included in this document is accurate at the time of publi-
cation. However, this product is subject to change without prior notice. In
addition, the illustrations in this document are meant only to help explain
system conguration concepts and installation instructions. The illustrated
items may dier from the actual items at the installation location.

Contents
1 Introduction 5
1.1 Features ................................ 5
1.2 PackageItems ............................. 5
1.3 LEDIndicators............................. 6
1.4 Specications ............................. 7
2 Safety 9
2.1 General Precautions for the Battery Pack . . . . . . . . . . . . . . 9
2.2 Tools .................................. 10
2.3 SafetyGear............................... 10
2.4 WarningLabels ............................ 11
3 Installation 12
3.1 Installation Location . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Installing the Battery Pack . . . . . . . . . . . . . . . . . . . . . . 13
Mounting the battery pack to a wall . . . . . . . . . . . . . . . . 13
Connecting the battery pack to the inverter . . . . . . . . . . . . 14
3.3 Expanding the Battery Pack . . . . . . . . . . . . . . . . . . . . . 17
Connecting an expansion pack to the main pack . . . . . . . . . 17
Mounting an expansion pack to a wall . . . . . . . . . . . . . . . 19
3.4 Checking Before Operation . . . . . . . . . . . . . . . . . . . . . 20
Circuit breaker switch . . . . . . . . . . . . . . . . . . . . . . . . 20
Circuit breaker’s trip button . . . . . . . . . . . . . . . . . . . . . 20
Voltage ................................. 21
3.5 GettingStarted ............................ 21
4 Troubleshooting 22
5 Emergency Situations 24
5.1 LeakingBatteries ........................... 24
5.2 Fire ................................... 24
5.3 WetBatteries.............................. 25
5.4 DamagedBatteries .......................... 25
3

Contents
6 Warranty 26
6.1 WarrantyCoverage .......................... 26
6.2 Limitation of Liability . . . . . . . . . . . . . . . . . . . . . . . . 26
A Technical Information 27
4

1Introduction
1.1 Features
The RESU®6.4 EX battery pack has the following features:
Photovoltaic system: This battery pack is designed for household photovoltaic
systems.
Battery management system (BMS): The battery pack’s built-in BMS moni-
tors its operation and prevents the battery from operating outside design
limitations. See Troubleshooting on page 22.
Expandability: This battery pack can be easily expanded by adding expan-
sion battery packs. See Expanding the Battery Pack on page 17.
1.2 Package Items
Items other than those listed below, such as a power cable, may be provided
separately.
Status Charge/ Discharge
RESU 6.4
R
Battery pack
Communication cable
adapter Mounting brackets
For details on how these items are used, see Installation on page 12.
5

Introduction
NOTE
A tag is attached to the gender changer side of the provided cable adapter.
The tag is labeled as TYPE-S or TYPE-N.TYPE-S adapters are supposed
to be used with SMA inverters, and TYPE-N ones are supposed to be used
with Nedap inverters. If the wrong cable adapter is identied, contact LG
Chem or an authorized dealer.
1.3 LED Indicators
Status Charge/ Discharge
RESU 6.4
R
Status Charge / Discharge
RESU 6.4 EX
R
The LED indicators on the front of the battery pack show its operational state
as follows:
Standby : When the battery pack is ready for operation, the Status indi-
cator is lit in red.
Normal operation : When the battery pack is in normal operation, the
Status indicator is lit in green.
Charge in progress : While the battery pack is charging, the Charge /
Discharge indicator is lit in red.
Discharge in progress : While the battery pack is discharging, the Charge
/ Discharge indicator is lit in green.
Alarm : When the battery pack is in a warning or fault state, the Sta-
tus indicator alternately ashes in green and orange. See Troubleshoot-
ing on page 22.
6

Introduction
1.4 Specications
Dimensions and weight
Length 406 mm
Width 165 mm
Height 664 mm
Weight 60 kg
StatusCharge/ Discharge
RESU 6.4
R
664
165
406
Performance
Nominal voltage 51.8 V
Operating voltage 45.2 V to 58.1 V
Nominal capacity 126 A·h
Nominal energy 6.4 kW·h
Nominal charge current 42 Aa
Nominal discharge current 42 Ab
Maximum discharge current 110 A
ain constant-current/constant-voltage charging mode
bin constant-current discharging mode
7

Introduction
Cable requirements
Power cable from inverter 4 AWG (21 mm2) or thicker, UL 1283
Cable lug M8
Environmental requirements
Available operating temperature 0°C to 40°C
Optimal operating temperature 15°C to 30°C
Operating relative humidity 25% to 95%
Storage temperature −30°C to 50°C
Storage relative humidity 25% to 95%
Communication interface
Protocol CAN 2.0B
Channel 1
8

2Safety
2.1 General Precautions for the Battery Pack
WARNING
Failure to observe the precautions described in this section can cause seri-
ous injury to persons or damage to property.
Observe the following precautions:
• Risks of explosion
–Do not subject the battery pack to strong impacts.
–Do not crush or puncture the battery pack.
–Do not dispose of the battery pack in a re.
• Risks of re
–Do not expose the battery pack to temperatures in excess of 50°C.
–Do not place the battery pack near a heat source such as a replace.
–Do not expose the battery pack to direct sunlight.
–Do not allow the battery connectors to touch conductive objects such as
wires.
• Risks of electric shock
–Do not disassemble the battery pack.
–Do not touch the battery pack with wet hands.
–Do not expose the battery pack to moisture or liquids.
–Keep the battery pack away from children and animals.
• Risks of damage to the battery pack
–Do not allow the battery pack to come in contact with liquids.
–Do not subject the battery pack to high pressures.
–Do not place any objects on top of the battery pack.
9

Safety
2.2 Tools
The following tools are required to install the battery pack:
Torque screwdriver Phillips-screwdriver bit Hex-key bit
Phillips-head screwdriver Wire cutter
Use properly insulated tools to prevent accidental electric shock or short cir-
cuits. If insulated tools are not available, cover the entire exposed metal sur-
faces of the available tools, except their tips, with electrical tape.
It is highly recommended to use adjustable tools and measuring instruments
that are certied for precision and accuracy.
2.3 Safety Gear
It is recommended to wear the following safety gear when dealing with the
battery pack.
Insulated gloves Safety goggles Safety shoes
10