EG4 ELECTRONICS EG4 Life Power4 48v V2 Server Rack User Guide

Requirements for Installation: Make sure to meet all requirements listed in section 8.2 before proceeding with installation.
Installation in EG4 Battery Rack: For specific instructions on installing in EG4 Battery Rack, refer to section 8.3.

Battery Communications

Multiple Batteries in Parallel: If using multiple batteries in parallel, follow guidelines in section 9.1.

Communication Cable Pinout and DIP Switch ID Tables: Refer to section 9.2 for detailed information on cable pinout and DIP switch settings.
Protocol Change/Selection Procedure: Follow the procedure outlined in section 9.3 to change or select communication protocols.

Protocol Select

Protocol ID DIP Switch: Set the protocol ID using the DIP switch as described in section 10.1.

RS485 Protocol Autodetection: Learn how to enable RS485 protocol autodetection from section 10.2.
Installing with Different EG4 Battery Models: Section 10.3 provides guidance on installing with various EG4 battery models.

BMS Tools

Introduction to the BMS: Understand the basics of the Battery Management System from section 11.1.

BMS Tools Installation and Interfacing: Follow instructions in section 11.2 for installing and interfacing with BMS tools.

©2024 EG4 ELECTRONICS, LLC. ALL RIGHTS RESERVED.
VERSION 1.2.1 | INFORMATION SUBJECT TO CHANGE WITHOUT NOTICE.
MODEL #: SR-48-100-LP4-IN-02

ABBREVIATIONS

· AWG – American Wire Gauge	· In-lbs. – Inch Pounds
· A – Amps	· kW – Kilowatt
· Ah – Amp hour(s)	· kWh – Kilowatt-hour
· AC – Alternating Current	· LCD – Liquid Crystal Display
· AFCI – Arc-Fault Circuit Interrupter	· LFP – Lithium Iron Phosphate
· AHJ – Authority Having Jurisdiction	· L1 – Line 1
· kAIC – kilo-Amp Interrupting Capability	· L2 – Line 2
· ANSI – American National Standards Institute	· mm – Millimeters
· BAT – Battery	· MPPT – Maximum Power Point Tracking
· BMS – Battery Management System	· mV – Millivolt
· COM – Communication	· N – Neutral
· CT – Current Transformer	· NEC – National Electric Code
· DC – Direct Current	· NEMA – National Electrical Manufacturers Association
· DIP – Dual In-line Package	· NFPA – National Fire Prevention Association
· DOD – Depth of Discharge	· Nm – Newton Meters
· EG – Equipment Ground	· NOCT – Normal Operating Cell Temperature
· EGS – Equipment Grounding System	· PC – Personal Computer
· EMC – Electromagnetic Compatibility	· PCB – Printed Circuit Board
· EPS – Emergency Power System	· PE – Protective Earth
· ESS – Energy Storage System	· PPE – Personal Protective Equipment
· E-Stop – Emergency Stop	· PV – Photovoltaic
· FCC – Federal Communication Commission	· RSD – Rapid Shut Down
· GE – Grounding Electrode	· SCC – Standards Council of Canada
· GEC – Grounding Electrode Conductor	· SOC – State of Charge
· GFCI – Ground Fault Circuit Interrupter	· STC – Standard Testing Conditions
· GFDI – Ground Fault Detector/Interrupter	· UL – Underwriters Laboratories
· Imp – Maximum Power Point Current	· UPS – Uninterrupted Power Supply
· IEEE – Institute of Electrical and Electronic Engineers	· V – Volts
· IP – Ingress Protection	· VOC – Open-Circuit Voltage
· Isc – Short-Circuit Current	· VMP – Voltage Maximum Power

TECHNICAL SPECIFICATIONS

MODULE OPERATING PARAMETERS
PARAMETER	BMS	RECOMMENDED
VOLTAGE	51.2V		–
CAPACITY	100Ah		–
CHARGING VOLTAGE (BULK/ABSORB)	56.8V		–
SOC CUTOFF	44.8V		20%*
CHARGING CURRENT	100A (Max. continuous)		30A
DISCHARGING CURRENT	100A (Max. continuous)		–
MAXIMUM CONTINUOUS DISCHARGE RATE	5.12kW
NAMEPLATE ENERGY CAPACITY	5.12kWh
BMS PARAMETERS
CHARGE	SPEC	DELAY	RECOVERY
CELL VOLTAGE PROTECTION	3.8V	1s	3.45V
MODULE VOLTAGE PROTECTION	60.0V	1s	55.2V
OVER CHARGING CURRENT 1	>102A	20s	–
OVER CHARGING CURRENT 2	≥120A	3s	–
TEMPERATURE PROTECTION	<23°F or >158°F <-5°C or >70°C	1s	<32°F or >140°F >0°C or 60°C
DISCHARGE
CELL VOLTAGE PROTECTION	2.3V	1s	3.1V
MODULE VOLTAGE PROTECTION	44.8V	1s	48.0V
OVER CHARGING CURRENT 1	>102A	30s	60s
OVER CHARGING CURRENT 2	>150A	3s	60s
SHORT-CIRCUIT	>300A	<0.1ms	–
TEMPERATURE PROTECTION	<-4°F or >167°F <-20°C or >75°C	1s	>14°F or <149°F >-10°C or <65°C
PCB TEMP PROTECTION	>221°F (>105°C)	1s	<176°F (<80°C)

GENERAL SPECIFICATIONS
PARAMETER	SPEC	TYPE	CONDITION
CELL BALANCE	120mA	Passive Balance	Cell Voltage Difference >40mV
TEMPERATURE ACCURACY	3%	Cycle Measurement	Measuring Range 40°F ‒ 212°F (-40°C ‒ 100°C)
VOLTAGE ACCURACY	0.5%	Cycle Measurement	For Cells/Module
CURRENT ACCURACY	3%	Cycle Measurement	Measurement Range +/-200A
SOC	5%	–	Integral Calculation
POWER CONSUMPTION (SLEEP & OFF MODE)	<300uA	–	Storage/Transport/ Standby
POWER CONSUMPTION (OPERATING)	<25mA	–	Charging/Discharging
COMMUNICATION PORTS	RS485/CAN	–	Customizable
MAXIMUM MODULES IN SERIES			1
MAXIMUM MODULES IN PARALLEL			64
E-STOP FUNCTION			Yes
DIMENSION (H×W×D)		6.1 in. × 19 in. × 17.4 in. (155 mm × 442 mm × 470 mm)
WEIGHT			99.6 lbs. (45.2 kg)
ENVIRONMENTAL PARAMETERS
CHARGING RANGE			32°F – 113°F (0°C – 45°C)
DISCHARGING RANGE			-4°F – 122°F (-20°C – 50°C)
STORAGE RANGE			-4°F – 122°F (-20°C – 50°C)
INGRESS PROTECTION			IP20
STANDARDS AND CERTIFICATIONS
MODULE		UL 1973 ETL Recognized Component Certification UL9540A (Passed) UL9540 listed with 18kPV-12LV

EG4 recommends this value be set no lower than 20% to maintain the recommended 80% depth of discharge.

BATTERY SAFETY

SAFETY INSTRUCTIONS
Before any work begins, carefully read all safety instructions, and always observe them when working on or with the battery. The installation must follow all applicable national or local standards and regulations. Consult with the local AHJ to obtain the proper permits and permissions before installation.

Incorrect installation may cause:

Injury or death to the installer, operator or third party

Damage to the battery or other attached equipment

IMPORTANT SAFETY NOTIFICATIONS

DANGER: Hazardous Voltage Circuits!

AVERTISSEMENT! Circuits à tension élevée!
There are various safety concerns that must be carefully observed before, during, and after the installation, as well as during future operation and maintenance. The following are important safety notifications for the installer and any end users of this product under normal operating conditions.

Do not disassemble the battery. Contact the distributor for any issues that need repair for more information and proper handling instructions. Incorrect servicing or re-assembly may result in a risk of electric shock or fire and void the warranty.
Never short-circuit DC inputs. Short-circuiting the battery may result in a risk of electric shock or fire and can lead to severe injury or death and/or permanent damage to the unit and/or any connected equipment.
Use caution when working with metal tools on or around batteries and systems. Risk of electrical arcs and/or short circuiting of equipment can lead to severe injury or death and equipment damage.
Beware of high battery current. Please ensure that the battery module breakers and/or on/off switches are in the “open” or “off” position before installing or working on the battery. Use a voltmeter to confirm there is no voltage present to avoid electric shock.
Do not make any connections or disconnections to the system while the batteries are operating. Damage to system components or risk of electrical shock may occur if working with energized batteries.
Make sure the battery and rack are properly grounded.
An installer should make sure to be well protected by reasonable and professional insulative equipment [e.g., personal protective equipment (PPE)].
Before installing, operating, or maintaining the system, it is important to inspect all existing wiring to ensure it meets the appropriate specifications and conditions for use.
Ensure that the battery and system component connections are secure and proper to prevent damage or injuries caused by improper installation.

WARNING: TO REDUCE THE RISK OF INJURY, READ ALL INSTRUCTIONS!
All work on this product (system design, installation, operation, setting, configuration, and maintenance) must be carried out by qualified personnel. To reduce the risk of electric shock, do not perform any servicing other than those specified in the operating instructions unless qualified to do so.

Read all instructions before commencing installation. For electrical work, follow all local and national wiring standards, regulations, and these installation instructions. All wiring should be in accordance with the National Electrical Code (NEC), ANSI/NFPA 70.
The battery and system can connect with the utility grid only if the utility provider permits. Consult with the local AHJ before installing this product for any additional regulations and requirements for the area.
All warning labels and nameplates on this battery should be clearly visible and must not be removed or covered.

The installer should consider the safety of future users when choosing the battery’s correct position and location as specified in this manual.
Please keep children away from touching or misusing the battery and relevant systems.
The battery is designed to stop charging when reaching the low threshold of 32°F. If charging current is observed when the internal battery temperature is below 32°F, disconnect battery immediately and consult manufacturer.

UL 1973 CONDITIONS OF ACCEPTABILITY

The products covered in this Report are incomplete in construction features or limited in performance capabilities and are intended for use and evaluation in other products.
Consideration should be given to the following when the component is used in or with another product.

The battery module SR-48-100-LP4-IN-02 (LifePower4 V2) had been evaluated based upon manufacturer’s specifications for charging, discharging and temperature limits. They have not been evaluated in combination with charger(s) or other control systems in the end use application. Additional evaluations are needed in the end product to determine the compatibility of assemblies with other systems and to ensure that the assemblies are used within their normal operating regions.
The battery module Model SR-48-100-LP4-IN-02 does not consider environment test included Salt Fog Test. The acceptance of the battery pack shall be determined in the end use application if the battery pack was used near marine environment.
The battery module SR-48-100-LP4-IN-02 is intended to be used in indoor use only. It does not have an enclosure with a UV / Water exposure rating for use in outdoor locations, additional evaluation needed if exposed to sunlight or water in the end use application.

The battery module SR-48-100-LP4-IN-02 was dropped from a height of 10cm. If it was installed and serviced more than 10cm in the end use application, the acceptance shall be determined by the end use application.
The battery module SR-48-100-LP4-IN-02 has not been evaluated for multiple BATTERY MODULE in parallel or series. Additional evaluation and testing may be needed in the end use application.
The instructions for the proper installation and use including charging and discharging, storage, recycling and disposal shall be required for the end use application. These instructions shall include temperature limits, charging and discharging limits as well as instructions regarding the use of any controls or monitoring systems.

See sections 2 – 5, 10, and 14 for detailed installation instructions to meet these conditions.

PACKING LIST

When the product is unpacked, the contents should match those listed below:

STORAGE CONSIDERATIONS

There are a few steps to be taken to ensure that batteries are stored safely and in a state that will ensure they are not damaged during storage.

Battery State
The state of the battery when placed into storage will affect how long it can be stored as well as the battery’s condition when it is brought out of storage. EG4® recommends that each battery is brought to a 50% SOC (state of charge) before placing it in storage. Lithium batteries will lose a certain percentage of their total charge while in storage, depending on how long they are stored and the conditions they are stored in. EG4 recommends recharging the batteries after 8 – 9 months in prolonged storage.

Environmental Factors
The storage location for the EG4 battery can greatly affect the health of the battery. For best results, the temperature should remain moderate, between 41°F and 68°F (5°C and 20°C). Keep the battery away from locations where it may get wet or locations with high humidity (>55%). Store the batteries away from combustible materials!

FRONT PANEL CALLOUTS

BATTERY DIAGRAM

NO.	ITEM	DESCRIPTION	REMARKS
1	Rack mount ear	For battery rack mounting	Secures the battery to the rack
2	Handle	For carrying/handling battery	–
3	Positive terminal	M8 bolt (x2)	–
4	CAN	CAN communication interface	Pin 4 – CAN_H Pin 5 – CAN_L
5	RS485	RS485 communication interface	Pin 1 & Pin 8 ‒ RS485_B Pin 2 & Pin 7 – RS485_A
6	Battery Communications	Parallel battery communication port	Used for closed-loop communication
7	Negative terminal	M8 bolt (x2)	–
8	Breaker	Circuit breaker	DC Output
9	Protocol DIP Switch	Select inverter protocol	6 position DIP switch
10	Battery ID DIP Switch	ID for battery arrangement	6 position DIP switch, can support 64 in parallel
11	USB Port	Reserved	–
12	Reset	Emergency Reset	–
13	ALM	Alarm LED Display	–
14	RUN	Run LED Display	–
15	SOC	State Of Charge Display	LEDs indicate charge level
16	ON/OFF Switch	Turn BMS on/off	–
17	GND	Ground connection for safety	–

LED INDICATOR STATUS & DEFINITION

STATUS	NORMAL/ ALARM/ PROTECTION	RUN	ALM	SOC INDICATOR LED	NOTES
STATUS	NORMAL/ ALARM/ PROTECTION			SOC1~SOC4	–
Shutdown/Sleep		OFF	OFF	OFF	–
Stand-by	Normal	ON	OFF	Based on battery indicator (Each LED indicates 25% SOC)	–
Stand-by	Alarm	ON	FLASH		According to the state before stand-by
Charge	Normal	Short flash	OFF		–
	Alarm	Short flash	Short flash		–
	End-off Voltage	OFF	ON		–
	Over-temp Protection	OFF	Short flash		–
	Over-current transfer limit protection	Short flash	Short flash/OFF		–
Discharge	Normal	Long flash	OFF	Based on battery indicator	–
	Alarm	Long flash	Long flash		–
	End-off voltage	OFF	OFF		Go to sleep
	Over-temp/ Over-current protection	OFF	ON		–
BMS Fault	–	OFF	Flash	All OFF	–

INSTALLING THE BATTERY

GENERAL INSTALLATION

NOTE:
Where ambient temperature is above 86°F (30°C), cable size must be increased according to NEC 310. The 4 AWG cable included in the package is intended only for the connection from the battery module to an EG4 battery rack busbar.

DANGER!
When adding or removing a battery from any rack, cabinet, or busbar, turn off ALL batteries, and use a voltmeter to confirm there is no voltage present. This will prevent users from encountering live (powered) busbars by accident.
Failure to do so can result in severe injury and/or death!

Tools Needed for Installation
The tools required may vary depending on the installation location. Typically, the following items are needed to install the battery into an EG4® battery rack solution or general racking:

10mm socket and ratchet
Phillips head screwdriver

Torque wrench
M8-1.0 terminal bolts (included in package)

WARNING:
Do not put EG4 batteries in series! The BMS and internal components are not designed to handle this setup, which could cause the modules to fail leading to damage.

REQUIREMENTS FOR INSTALLATION

Make sure the battery breaker is turned off during the installation process to avoid any electrical hazards or damage to the batteries.
Avoid exposing batteries to conductive materials, such as water, strong oxidizers, and strong acids.

Avoid putting batteries in direct sunlight or on extremely hot surfaces.
Keep all flammable materials out of the working area.
Use caution when handling batteries and/or battery-powered devices to avoid damaging the battery casing or connections.

Before using batteries, inspect them for signs of damage. Never use damaged or puffy batteries. Please contact the distributor if a battery is received in this state or experiences this issue.

CAUTION:
Never position the battery upside down or face down!

INSTALLATION IN EG4 BATTERY RACK

NOTE:
The image below represents 6 EG4® LifePower4 V2 batteries with an EG4 Welded Indoor Cabinet. When installing multiple batteries or adding a battery to an existing rack, please ensure each battery is charged individually to 100% before paralleling them together. This step is crucial to optimize battery performance and ensure proper operation.

Insert the battery into the rack slot, beginning with the bottom slot and progressing upward. Slide in until the battery is firmly seated in the rack.
Use the included 4 AWG power cable to connect each battery to the busbar.
DO NOT finger tighten the battery or busbar terminal bolts. The battery bolts require a certain torque [60 in-lbs. (6.8Nm)] to ensure they do not loosen during operation. Failure to properly tighten the terminal bolts can result in serious damage and will void the warranty.

Clearly identify the location of the batteries positive and negative terminals—red to the positive terminal and black to the negative terminal. Then connect to the inverters positive and negative terminals.

Grounding
Attach a grounding wire from the rack/cabinet to an equipment grounding conductor, then terminate the EGC at a grounding electrode.

WARNING:
Do not ground rack/cabinet or door to negative or positive bus bars!

In this image, there are 6 LifePower4 V2 100Ah batteries wired in parallel. This battery bank still maintains the appropriate 48V needed for a system. However, the amp hour rating of this bank has increased to 600Ah. In addition, the potential output amperage of the rack increases.

NOTE:

Use the included battery cables or size the battery cables appropriately! Refer to an NEC approved ampacity chart for specifications.
EG4 recommends using a properly sized (amp rated) busbar to parallel batteries together. Paralleling via the battery terminals will cause inconsistent charging and discharging issues in the bank.

BATTERY COMMUNICATIONS

Each EG4 Electronics® battery is designed with the end-user in mind, displaying as much information as possible in the simplest manner. EG4 Electronics includes the option of connecting the battery to PC software to monitor the module status. This enables users to monitor and comprehend the battery’s performance and to troubleshoot any issues that may occur.

When a single battery is used, it will communicate directly with the system via the RS485 or CAN port. The battery will connect via a properly pinned battery communications cable (included).
The communication cable from battery to battery is a standard CAT5 cable. If the battery to inverter communication cable is not long enough to span the distance from inverter to master battery, please refer to the Communication Cable Pinout Table in Section 9.2.

WARNING:
Make sure to install the communication cables into their respective ports! Improper installation may lead to component damage!
EG4 recommends double checking all points of connection before introducing power to the system to mitigate any potential issues.

MULTIPLE BATTERIES IN PARALLEL

Ensure all battery breakers and BMS are OFF.
Set the address code of each battery according to the DIP Switch ID Table (see Section 9.2: DIP Switch ID Table), making sure there are no duplicate addresses.
Establish communication between the batteries via the “Battery-Comm” ports. Starting with the bottom battery and working all the way to the top battery. (See Section 8.3 for installation)

The battery with DIP Switch ID 1 (referred to as the host) connects to the system via communication cable using the RS485 or CAN port. (See image to the right)
Power on each battery breaker and BMS ON switch one at a time beginning with the host battery.

COMMUNICATION CABLE PINOUT AND DIP SWITCH ID TABLES
EG4® LifePower4 48V V2 batteries interface with an inverter by designating a “Host” battery (DIP switch ID No. 1). The ID code range is 1 ‒ 64 and the communication mode can support up to 64 modules in parallel.

PIN	DESCRIPTION
1	RS485-B
2	RS485-A
3	CAN Ground (optional)
4	CAN High
5	CAN Low

Pinouts are for battery side; please refer to the system manual for pinout configuration on system end

DIP switch ID table – 6 Pin

REMINDER
When paralleling multiple batteries, all DIP switch settings must be different from each other. This allows all equipment to see each battery in the bank separately. EG4 recommends addressing the batteries in ascending order.

PROTOCOL CHANGE/SELECTION PROCEDURE

REMINDER:
Only the host battery (Address 1) needs the inverter protocol to be set to communicate with the inverter.

NOTE:
The inverter protocol ID is used for establishing closed-loop communications with supported inverters. The inverters listed in chart 10.1 are capable of closed-loop communications with the battery. All other inverters will not support closed-loop communications with LifePower4 V2 batteries.

Power off all battery DC breakers and BMS power buttons. Ensure that the voltage between positive and negative busbars is 0V.
Change the inverter protocol selection to match the model of inverter. See section 10.1 for more information.
Power cycle the host battery, and the BMS will correspond to the protocol selected.

PROTOCOL SELECT

PROTOCOL ID DIP SWITCH

RS485 PROTOCOL AUTODETECTION

NOTE:
When using RS485 communications, the battery will auto detect the inverter protocol being used.

NOTE: BMS ON/OFF switch will have to be powered off and back on for the address changes to take effect and reengage.

INSTALLING WITH DIFFERENT EG4 BATTERY MODELS
EG4® LifePower4 batteries can communicate with all EG4 48V server rack modules.

NOTE:
When installing multiple batteries or adding a battery to an existing rack, please ensure each battery is charged individually to 100% before paralleling them together. This step is crucial to optimize battery performance and ensure proper operation.

If communicating multiple EG4 batteries together, the Multipack firmware will need to be used via an RS485 Update. For the example below, all batteries will need to be updated EXCEPT the EG4 LifePower V2.
RSD will be disabled on the battery models that has this feature when using the multipack firmware.

Please visit https://eg4electronics.com/resources/downloads for the Multipack firmware.

Always use the newest model of LL at the top of the rack as this will need to be the battery that communicates with the system. This battery is also known as the master and will need to have ID number 1.
When installing the batteries, ensure that the same models are grouped together in the bank. This allows for communication to flow between the batteries consistently.

After installing the batteries into the rack, refer to the DIP Switch ID table to assign the address code of the bank in numerical order, beginning with the master and progressing among the different models.

The image on the left shows a bank with the following EG4 modules:

LL-S (6 DIP) [ID-1]: Requires Multipack Firmware

LL-V2 (6 DIP) [ID-2]: Requires Multipack Firmware
LL-V2 (4 DIP) [ID-3]: Requires Multipack Firmware
LL-V1 [ID-4]: Requires Multipack Firmware

LifePower4 V2 [ID-5]: No firmware update needed. Set the Inverter Protocol dipswitch set to the “Simplified Link Protocol.” See Section 6.
LifePower4 [ID-6]: Requires latest firmware

NOTE: If utilizing an external E-Stop switch on the LL-S battery, the following pinout information stays relevant to the function. Once the E-Stop engages, all batteries in the bank will initiate the stop function.

PARALLEL CABLES NEEDED
To successfully communicate between each model of battery, a standard Cat5e (or higher) cable will need to be connected between each battery.

BATTERY-TO-BATTERY CABLE PINOUT
The pins utilized for battery-to-battery communication are as follows:

LL-V1/LifePower4
Pin	Description
7	RS485-B
8	RS485-A

LL-S/LL-V2 (4&6 DIP)
Pin	Description
7	RS485-B
8	RS485-A

NOTE: When using LL-V1 and LifePower4 batteries in communications with the LL-S/LL-V2 multi-pack firmware, ensure the communications cable between the LL-V2 and all older model batteries down are pinned to this standard. If there are extra pins populated, the LL-S will trip its breaker if it receives a signal from pins 3 or 6 along with all other batteries in this parallel configuration.

The battery will only send a transmit/receive signal over these two pins. Ensure the battery-to-battery communication cable is only utilizing pins 7 & 8.

FIRMWARE UPDATES
Visit https://eg4electronics.com/resources/downloads to get the latest version of the software. The file can be located on the downloads page underneath the product in question.
Once the file has been downloaded, unzip the file. Once the file is unzipped, refer to the included “Connection guide for BMS Tools V1.0.pdf” for an extensive walkthrough to set up BMS Tools.
If confirmation of the port numbers for battery to PC communications is needed, please consult the following section.

UPDATE CABLES NEEDED
Each battery requires the same RS485 cable to apply the firmware updates. Please refer to the table below for the pinout description.
Ensure all batteries’ firmware matches the numbers listed below for seamless communication.

Pin	Description
1	RS485-B
2	RS485-A

MULTIPACK FIRMWARE VERSIONS NEEDED
Listed below are the multipack firmware version numbers that need to be used for each battery type:

EG4 LL V2/S (ID:6) 51.2V 100ah: Z02T12

EG4 LL V2 (ID:4) 51.2V 100ah: Z01T16
EG4 LL V1 51.2V 100ah: V15P15
LifePower4 51.2V 100ah: V3.37 or V2.16

BMS TOOLS

INTRODUCTION TO THE BMS
The BMS is intended to safeguard the battery and battery cells against a variety of situations that could damage or destroy system components. This protection also aids in keeping the battery and battery cells operational for a greater number of life cycles. Each EG4® LifePower4 battery is specifically configured to ensure peak performance and operation with any system.

PCB temperature protection
The BMS will ensure that the Printed Circuit Board (PCB) does not overheat. This is the part that houses most of the “brains” of the battery. This feature will turn the battery off if it begins to overheat.

Cell balance protection
Cell balance ensures that each cell is within a specific voltage range of each other. Cell balance is crucial for ensuring that the battery is operating properly for its lifespan. This is always done automatically.

Environmental temperature protection
It may be dangerous to attempt to use the battery in extreme heat or cold. Continued operation in these conditions may result in permanent damage to the battery module and its components. To prevent this, the BMS is designed to measure the temperature while charging/discharging and will shut down the battery to prevent damage.

Voltage protection
The BMS is designed to continuously monitor the voltage of each individual cell and ensure that they are not over/undercharged.

Current protection
The BMS is designed to constantly monitor the charge/discharge amperage and has built-in safeguards against exceeding specific parameters. These include built-in timers that shut off quickly in the event of short circuits, extremely high amperage, and delayed shut down for amperage that is only slightly above the maximum capacity.

BMS TOOLS INSTALLATION AND INTERFACING
The PC software “BMS Tools” provides real-time battery analysis and diagnostics. The battery cannot communicate with BMS Tools and a closed loop inverter at the same time.

Visit https://eg4electronics.com/resources/downloads to get the latest version of the software. The file can be located on the downloads page underneath the product in question.
Once the file has been downloaded, unzip the .zip file. Once the file is unzipped, refer to the included “Connection guide for BMS Tools V1.0. or V2.2.1.pdf” for an extensive walkthrough to set up BMS Tools.
If confirmation of the port numbers for battery to PC communications is needed, please consult the following section.

For instructions on how to interface with BMS Tools, please scan the QR codes below.

FIRMWARE UPDATES
Always ensure all system components are fully up to date before commissioning the system and that all battery firmware is up to date to support proper closed loop communication.
Please visit https://eg4electronics.com/resources/downloads for the latest firmware.

TROUBLESHOOTING, MAINTENANCE & DISPOSAL

BATTERY CHARGING
Ensure the proper settings are set on the charge controller and/or inverter being used to avoid overcharging or damaging the module.
(Refer to Section 2: Technical Specifications Table for a full list of charging/discharging parameters.)

IMPORTANT:
It is normal for lithium batteries with an internal BMS that are wired in parallel to demonstrate a wide variety of SOC readings during any given charge or discharge cycle. Variations of up to 10% are common. This is not cause for concern or indication that the module is providing less than the maximum capacity. This can be caused by a few different factors, including variations in wire resistance, internal battery resistance, temperature differences and cell variations. Even a slight variation causes one battery to take more of the load or charge for a short time. Over the duration of the discharge or charge cycle, this will balance out with the lagging battery taking the load or charge at the other end of the cycle resulting in recovering the full listed kWh capacity of the pack. The voltage differences created as batteries diverge in SOC will eventually cause them to converge at some point in the cycle.

ALARM DESCRIPTION AND TROUBLESHOOTING
When the ALM light on the battery control panel is on, it means that the battery has given an alarm or has been protected from potential damage. Please check the cause of the failure through EG4 Monitor Center or BMS Tools and take appropriate measures or go directly to the battery site to troubleshoot.
BMS Tools alarms are shown in the table below.

Warning and Protect Status Definitions Table:

STATUS	NAME	DEFINITION	ACTION
Charge	Charge OT	Charge over-temperature	Power off module and cool down location.
Charge	Charge UT	Charge under-temperature	Power off module and warm up location.
Discharge	Discharge OT	Discharge over-temperature	Power off module and cool down location.
Discharge	Discharge UT	Discharge under- temperature	Power off module and warm up location.

NOTE:
The “Historical Record” tab, which can be found in the BMS Tools program, can indicate what occurred with the module before entering a warning or protection state. It is recommended to export this data into a text (.txt) file to provide to the distributor for any additional troubleshooting assistance.

Other Common Faults and Solutions

FAULT	ANALYSIS	ACTION
Inverter communication failure	Check communication port connection and battery ID setting.	Select proper “host” battery DIP switch address, and power cycle the battery.
No DC output	Open breaker, or battery voltage is too low.	Check battery breaker and/or charge the battery.
Power supply unstable	Battery capacity is not at full power.	Check for proper battery cable connection.
Battery cannot be charged fully	DC output voltage is below the minimum charge voltage.	Check the charging settings on the inverter to ensure they match battery requirements.
ALM LED always on	Short circuit	Turn off the battery breaker and check all cabling.
The battery output voltage is unstable.	Battery management system does not operate normally.	Press the reset button to reset the battery, then reboot the system.
ALM LED flashes 20 times with SOC1 LED on.	Unbalanced voltage within a cell	Deep discharge the battery bank (<20% SOC), then charge battery bank fully.
ALM LED flashes 20 times with SOC2 LED on.	Unbalanced temperature	Contact the distributor.
ALM LED flashes 20 times with SOC 3/4 LED on.	BMS damaged	Contact the distributor.
Different SOC value of batteries in parallel operation.	No issue	Deep discharge the battery bank (<20% SOC), then charge battery bank fully.
Low voltage protection with no LED on	BMS is in low voltage protection, and is in sleep mode	Follow the below steps to reboot the module. 1. Charge the battery immediately and it will reboot itself. 2. Switch off and switch on, when on, charge it immediately. If you follow step 1 or step 2 without charging immediately, the BMS will go into protect mode and go to sleep mode shortly after.
Deeply discharged with “RUN” LED on	The battery voltage is too low to start BMS.	Contact the distributor.

NOTE:
If any of the warnings or faults from both tables persist, please contact the distributor for additional troubleshooting steps.

LONG TERM MAINTENANCE

ITEM	MAINTENANCE METHOD	MAINTENANCE INTERVALS
Power Cables	1. Check whether there is mechanical damage to the power cable and whether the terminal insulation sleeve has fallen off; if there is such a phenomenon, please turn off the battery and carry out maintenance or replacement. 2. Check whether the power cable is loose; if there is any sign of looseness, use a standard torque wrench to tighten it. 3. Check the system for loose screws or discoloration of the copper bus bar; if the screws are loose, tighten them with a standard torque wrench; if the copper bus bar is discolored, please contact the manufacturer for after-sales replacement.	Once every 6 months
Communication Cables	1. Check whether the parallel communication cable terminal is loose, if it is loose, re-tighten it. 2. Check whether the color of the communication cable has obvious discoloration, if discoloration, shut down the machine and replace the communication cable.	Once a year
Cabinet Cleanliness	Check the cleanliness of the front door, back door and battery module inside the cabinet. If there is dust, dirt, or debris, clean accordingly.	Once every 6-12 months
System Running Status	1. Check if all parameters are normal when the system is running (system voltage, current, temperature, etc.) 2. Check whether the main core components of the system are normal, (system switches, contactors, etc.,) showing no faults or warnings. 3. Check whether the system air inlet and outlet are normal, if there is blockage and congestion, need to clean up.	Once every 6 months
Charge and Discharge Maintenance	Use light loads and shallow charge/discharge to check whether the SOC, SOH status of the battery is normal (using the BMS Tools computer software to read); it is recommended that the depth of discharge and charge/discharge power should not exceed 20% of the rated value.	Once every 6 months

BATTERY END OF LIFE

The EG4® LifePower4 48V battery is designed to last for more than 15 years when used correctly. We have worked tirelessly to ensure that our batteries will maintain a charge after thousands of cycles. However, when it does come time to retire the battery, there are a few things to consider. Lithium iron phosphate batteries are considered a hazardous material and should not be disposed of by simply placing them in the trash. There are several websites and organizations that will accept this battery to recycle at little to no cost to the user. At EG4, we understand that we are working with customers across the United States and the world. Our recommendation is to go online and search the term “Lithium Battery Disposal Near Me.” There will likely be an assortment of organizations that can safely dispose of LFP batteries.
We recommend calling ahead of time to ensure that the location is still open and accepting material.
If users are unable to locate a disposal location safely, EG4 is here to help. Before dumping the battery or disposing of it incorrectly, please contact our customer service team for assistance.

EG4 10-YEAR LIMITED WARRANTY

Congratulations on your purchase. EG4 Electronics offers a 10-year Full Parts Replacement or Full Product Replacement Prorated Warranty from the date of battery (EG4 LifePower4 v2*1) purchase. Your warranty must be registered within the first year of purchase or provide proof of purchase from an EG4 authorized distributor to remain valid. If you choose not to register or cannot provide proof of purchase, your warranty may be invalidated. This limited warranty is to the original purchaser of the product and is one time transferable only if the product remains installed in the original installation location. All parts exchanges, including BMS, are covered during the warranty period. If a full replacement warranty is needed, the warranty is prorated 1/10th per year after the first year at the current retail pricing. Replacement shipping charges may incur on a case-by-case basis. Outside of the continental US, replacement shipping charges may apply.
Product that is not purchased through an EG4 approved vendor is not covered under this warranty. A list of approved vendors can be found on our website. Reselling or removing the product from the original installation site will void the warranty.

Warranty Exclusions – EG4 Electronics has no obligation under this limited warranty for products subjected to the following conditions (including but not limited to):

Damages incurred during installation/reinstallation or removal
Poor workmanship performed by an individual, installer, or a firm
Damages caused by mishandling the product or inappropriate environmental exposure
Damages caused by improper maintenance or operating outside the specified operating conditions
Tampering, altering, and/or disassembly of the product
Using product in applications other than what the manufacturer intended
Lightning, fire, flood, earthquake, terrorism, riots, or acts of God
Any product with a serial number that has been altered, defaced, or removed
Any unauthorized firmware updates/upgrades/patches
Damages incurred from a voltage or current spikes due to open-loop lithium battery communications

EG4 product warranty is a limited warranty – EG4 limits its liability in the event of a product defect to repair or replacement in accordance with the terms of this limited warranty. EG4 is not responsible for any additional or indirect damages that may arise from the malfunctioning of the product. These damages could be incidental or consequential, including without limitation, any liability for the loss of revenue, profits, or time. EG4 shall not be liable for any direct or indirect loss of life, including but not limited to bodily injury, illness, or death arising from the misuse or mishandling of the product, whether caused by negligence or otherwise.

Return Policy and Warranty Claims Procedure: Contact your original place of purchase.

Frequently Asked Questions

How do I ensure battery safety?

Refer to section 3 - Battery Safety for detailed safety instructions.

Can I install the battery without meeting all requirements?

It is crucial to fulfill all installation requirements listed in section 8.2 before proceeding with installation to avoid issues.

What is the protocol change procedure?

Section 9.3 outlines the protocol change/selection procedure for your reference.

How do I set the protocol ID?

You can set the protocol ID using the DIP switch as explained in section 10.1.

Where can I find information on BMS tools?

Section 11 provides detailed information on BMS tools,including installation and interfacing steps.

CHANGELOG

Version 1.2.1
- Removed irrelevant information regarding simplified/complete protocol DIP from section 10.
Version 1.2
- Added Section 4, UL 1973 Conditions of Acceptability
- Added RS485 Protocol Autodetection Section 10.2
Version 1.1
- Modified cell information and certifications
- Modified verbiage on cover page
Version 1.0
- First version release

CONTACT US
support@eg4electronics.com
903-609-1988
www.eg4electronics.com

Documents / Resources

EG4 ELECTRONICS EG4 Life Power4 48v V2 Server Rack [pdf] User Guide
EG4 Life Power 4 48v V2 Server Rack, EG4, Life Power 4 48v V2 Server Rack, 4 48v V2 Server Rack, V2 Server Rack, Server Rack, Rack

References

User Manual

EG4 ELECTRONICS EG4 Life Power4 48v V2 Server Rack

Product Usage Instructions