EPEVER LiFePO4 (LFP) Battery Product Manual

1. Important Safety Instructions

Thank you for choosing EPEVER Lithium Iron Phosphate (LFP) battery. Please read this manual carefully before using this product. It is strictly forbidden to install this product in harsh environments such as moisture, salt spray, corrosion, greasy, flammable and explosive, or a large amount of dust accumulation. Please keep this product manual for future reference.

Precautions for Work and Storage

Please keep the battery in a cool, dry place. The environment should be free of corrosive, explosive and insulation-damaging gases or conductive dust, and away from fire and heat sources and high pressure; ? It is forbidden to immerse the battery in water; ? Keep out of reach of children; ⚡ Pay attention to anti-static electricity (static electricity may damage the battery protection circuit, causing battery damage).
The battery should be safely fixed in a reasonable use of the environment, the connector must be reliably connected to avoid contact friction caused by arc and sparks.
When handling the battery, please handle it gently to avoid mechanical vibration, collision and pressure shock. Otherwise, it may cause internal short circuit of the battery, resulting in high temperature and fire.
❌ Do not short-circuit the positive and negative poles of the battery, and do not disassemble or assemble the battery to avoid danger.
Please keep the battery in a semi-charged state (40%~80% SOC is appropriate). Please wrap the battery with non-conductive materials to avoid direct metal contact with the battery, which may cause battery damage.
Please dispose of waste batteries safely and properly, and do not put them into fire or liquid. ?
This battery cannot be used in series.

Danger Warning

? It is strictly forbidden to crush, drop, collide, puncture, burn and other destructive behaviors on the battery.
❌ It is forbidden to disassemble and assemble the battery. Improper disassembly and assembly may damage the protective function of the battery, resulting in deformation, heating, smoke or combustion of the battery.
❌ It is forbidden to short circuit the battery. It is prohibited to connect the positive and negative electrodes of the battery with conductive materials; Do not store or transport the battery with the conductor to avoid battery damage due to short circuit.

Emergency Treatment Method

When the electrolyte leaks, avoid skin and eye contact with the electrolyte. In case of contact, wash immediately with plenty of water and seek help from a doctor. ?‍⚕️ It is forbidden for any person or animal to swallow any part of the battery or the substances contained in the battery.
If the battery is seriously deformed or the electrolyte leaks due to collision and extrusion, the battery should be placed in the explosion-proof box or an open place, and the personnel should be evacuated quickly if conditions permit. ?
If the battery catches fire during use or storage, use a high-pressure water cannon to extinguish the fire under the condition of ensuring personal safety. ?
If the battery catches fire during charging, be sure to turn off the charger as soon as possible before executing the next fire extinguishing action. ?

2. General Information

Appearance

The battery features a black metal casing. Key components visible include:

LCD color screen
Metal handle
Negative connector
Positive connector
Inverter communication interface
Parallel communication interface
Weak-current switch
Grounding screw interface
PC upper computer communication interface (labeled L)
Parallel communication interface (labeled M)
Pressure reducing valve

Product Size

The product dimensions are detailed, including specific requirements for fastener strips used for wall installation. The diagram shows the overall dimensions and mounting hole locations.

3. Basic Information

Interface Definition

The battery is equipped with multiple communication interfaces:

RS232 Communication Interface (RJ11)

Used to connect to the lithium battery PC upper computer. Pin definitions:

Pin 1: NC
Pin 2: NC
Pin 3: TX
Pin 4: RX
Pin 5: GND

CAN/RS485 Communication Interface (RJ45)

Used for communication between the lithium battery and the inverter host. Pin definitions:

Pin 1: RS485-B
Pin 2: RS485-A
Pin 3: GND
Pin 4: CAN-H
Pin 5: CAN-L
Pin 6: NC
Pin 7: RS485-A
Pin 8: RS485-B

DIP Communication Interface (RJ45)

Used for parallel communication between lithium batteries. Pin definitions:

Pin 1: RS485-B
Pin 2: RS485-A
Pin 3: GND
Pin 4: GND
Pin 5: OP+
Pin 6: NC
Pin 7: RS485-A
Pin 8: RS485-B

BMS Communication Interface (RJ45)

Used for communication between lithium batteries in parallel. Pin definitions:

Pin 1: RS485-B
Pin 2: RS485-A
Pin 3: GND
Pin 4: GND
Pin 5: UP-IN
Pin 6: NC
Pin 7: RS485-A
Pin 8: RS485-B

Product Features

Single voltage and overall voltage detection, over-voltage and under-voltage alarm and protection.
Charge and discharge current detection, alarm, and protection.
Cell, environment, and PCB temperature detection, with high/low temperature alarm and protection during charging and discharging.
Output short circuit detection and protection.
Battery SOC calculation and charge/discharge cycle calculation.
Charge balancing function to reduce current for high-voltage cells (using BMS-set balance current).
LED indicator function for current battery SOC, fault status, and operating status.
BMS manual and automatic sleep function.
Charge current limiting function.
History storage function (minimum 500 storage capacity).
RS485 communication function for real-time monitoring of BMS and battery status.
Two-stage over-current protection for discharge with different response speeds for different current values, ensuring reliable battery protection.

LCD Color Display

The LCD color display provides an interface for monitoring and configuration:

Interface Introduction

HOME page icon: Tap to enter the main menu.
Main State icon: Click to enter the Main State interface.
Parallel Data icon: Click to enter the Parallel Data page.

Menu Navigation

The menu structure allows access to various information and settings:

Main State Page: Displays SOC, Current, Voltage.
Home: Access to Main Menu.
BMS INFO: Detailed battery information including Voltage, Temperature (Cell 01 to Cell 16, NT1, NT2, NT3, NT4, Mos-T, ENV-T), Warning, Protect, Fault Record.
Warranty: Warranty information.
Parallel data: Data related to parallel configurations.
PACK Info: Detailed pack information.
BMS Status: Current status of the BMS.
PROTOCOL: Selection of communication protocols (e.g., LV BMS Protocol for Solar Inverter Family, PYLON PROTOCOL, SMA PROTOCOL, GROWATT ATT-PROTOCOL, etc.).
System: System settings including RS485, Language select (English, Chinese Traditional, Chinese), PACK SN, Bluetooth SN.

Note: Protocol list is accessed from the BMS motherboard. Initial permission password is 123456. Permissions are required to change protocols.

4. Instructions

Packing List

Before unpacking, check the packaging for damage and verify the battery model. Contact after-sales service if any abnormalities are found. After unpacking, verify all items against the packing list:

X1 Lithium battery
X1 Fastener strips for installation against a wall
X2 Fastener pieces for installation against a wall
X1 Connecting plate
X1 Positive output power cable
X1 Negative output power cable
X1 Positive connector quick plug
X1 Negative connector quick plug
X2 RNB22-8 wiring terminal
X1 Battery pack parallel communication cable
X1 RS485 communication cable
X1 USB-A to RS232 communication cable
X2 M8×12 bolt group
X17 M6×14 bolt group
X2 M8×60 expansion bolt

Installation Requirements

Space Installation Distance

Ensure all tools and devices are checked for safety. Minimize the distance between battery packs for optimal space utilization.

Installation Environment

Optimal working temperature: 20~40°C.
Avoid installation in environments with direct high temperature, rain, or close to high/low temperature sources.
Avoid areas with drastic ambient temperature changes or strong interference.
Keep away from children's access and areas prone to water accumulation.
? Do not place flammable and explosive materials around the equipment.

Prepare Tools

Required tools include:

Hammer Drill
Rubber Hammer
Claw Safety Hammer
Insulated Cross Screwdriver
Insulated Slotted Screwdriver
Spirit Level
Tape Ruler
Insulation Tape
Dustproof Cover
Protective Glasses
Utility Knife
Wire Stripper
Diagonal Pliers
MC4 Crimper
Multimeter
AC/DC Clamp-On Ammeter
Marker Pen
Electric Screwdriver

Space Installation Requirements

Follow these steps for wall mounting:

Position the mounting bracket against the wall, ensure it is level, mark screw holes, and remove the bracket.
Use a hammer drill to create holes (diameter: 10mm, depth: 65mm) and insert/tighten M8 expansion screws.
Lift and stack lithium batteries vertically. Use M6×14 screws to secure fastener pieces, connecting pieces, and other accessories.
Move the stacked battery packs to the desired position, align fixing strips against the wall, and affix them. Use four M6×14 screws to lock the battery pack from both sides. The final installation should be secure and stable.

Wiring Diagram

Connections include:

Positive output power cable (1500mm)
Negative output power cable (1500mm)
RS485 communication cable (1500mm)
Lithium battery positive parallel power cable
Lithium battery negative parallel power cable
Lithium battery parallel communication cable (DIP~BMS) (1200mm)

Warning:

For safety and compliance, disconnect communication and cable links with the inverter when storing the battery.
Wear safety helmets, goggles, protective shoes, and other safety equipment during handling and installation to prevent accidental injury.
All wiring must be performed by professionals. Use the correct cables, preferably those provided or recommended by EPEVER, for safe and efficient system operation.

Charging Operation

Check before charging: Inspect battery and inverter appearance, ensure power cords and wiring harnesses are connected. Verify power supply meets battery specifications.
Turn off the inverter or other equipment. Connect the positive and negative terminals of the battery, and connect the communication cable normally. Warning: Ensure correct polarity before connecting the battery; do not reverse connect.
Connect the charger to the power supply and turn it on.
Start the battery. The POWER indicator will light up, and the SOC indicator will flash, indicating normal charging.

Standard Charging: Charge the battery to 57.6V with a constant current of 20A (0.2C), then switch to constant voltage charging at 57.6V until the current drops to 5A (0.05C).

Note: All tests stated in this document shall be performed at 25±2°C.

Discharge Operation

Before discharging, check if the load and equipment are turned off.
Properly connect the positive and negative terminals of the battery to the load/inverter or other equipment. Warning: Confirm positive and negative wiring before connecting; prohibit reverse connection.
Turn on the load/inverter or other device.
Start the battery. The POWER indicator will be steady on, the RUN indicator will flash for 0.5 seconds, and discharge will begin.

Standard Discharge: After standard charging, discharge the battery with a constant current of 20A (0.2C) until the battery voltage drops to 41.6V.

Note: All tests stated in this document shall be performed at 25±2°C.

Precautions for Charging and Discharging Operation

When the temperature is high (≥35°C) in summer, avoid charging above 0.5C during the day. It is recommended to pause for over 30 minutes during charge-discharge conversion to prevent the battery from operating frequently in a high-temperature environment, which can affect its lifespan.
When the temperature is low (<0°C) in winter, limit battery discharge depth to <70% to avoid over-discharge caused by low temperatures, which can affect battery life.

Warning: This lithium battery should only be used with a manufacturer- or manufacturer-matched compatible inverter or other equipment. When the lithium battery does not communicate with the inverter or other equipment, it is forbidden to use the lithium battery.

Description of Battery Parallel Capacity and Voltage

Capacity	Number of Battery Parallel Groups	Maximum Charging Voltage	Discharge Cut-off Voltage
106Ah	2 groups	57.6V	41.6V
212Ah	3 groups	57.6V	41.6V
318Ah	4 groups	57.6V	41.6V
424Ah	5 groups	57.6V	41.6V
530Ah	6 groups	57.6V	41.6V
636Ah	7 groups	57.6V	41.6V
742Ah	8 groups	57.6V	41.6V

5. Protection Features

The battery management system (BMS) includes comprehensive protection features. The following table details these protections, their default parameters, and settable ranges:

No	Item	Factory Default Parameter	Set State	Postscript
1	Cell Overcharge Protection	Cell overcharge alarm voltage: 3600mV Cell overcharge protection voltage: 3650mV Cell overcharge protection delay: 1.0S	Settable	Release: SOC 96% or Discharge current 2A
	Cell Over-discharge Protection	Cell over-discharge alarm voltage: 3380mV Cell over-discharge protection voltage: 3380mV Cell over-discharge protection delay: 1.0S	Settable	Release: 2950mV or Plug in the charger to activate
	Battery Overcharge Protection	Battery overcharge alarm voltage: 57.6V Battery overcharge protection voltage: 58.4V Battery overcharge protection delay: 1.0S	Settable	Release: SOC 96% or Discharge current 2A
	Battery Over-discharge Protection	Overall over-discharge alarm voltage: 44.8V Overall over-discharge protection voltage: 43.2V Delay: 1.0S	Settable	Release: 47.2V or Plug in the charger to activate
5	Charging Over-current Protection	Alarm current: 105A Protection current: 110A Protection delay: 1.0S	Settable	Release: Automatically disconnects after 1min (or Discharge current > 1A). If locked 10 times, state is locked.
6	Discharge Over-current Protection 1	Alarm current: 105A Protection current: 110A Protection delay: 1.0S	Settable	Release: Automatically disconnects after 1 minute (or Discharge current > 1A). If locked 10 times, state is locked.
6	Discharge Over-current Protection 2	Protection current: 150A Protection delay: 500mS	Settable	Release: Charge disconnect (or Discharge current > 1A). After load removed, automatically removed.
8	Short Circuit Protection	-	Available	When there is charging, short circuit protection is removed. After load removed, automatically removed.
9	MOS High Temperature Protection	Alarm temperature: 90°C Protective temperature: 115°C Release temperature: 85°C	Settable	-
10	Cell Temperature Protection	Charge low temperature alarm: 5°C Charge low temperature protection: 0°C Charge low temperature protection release: 5°C Charging high temperature alarm: 60°C Charge high temperature protection: 55°C Charge high temperature protection release: 60°C	Settable	-
-	Discharge Low Temperature Alarm	-15°C	Settable	-
-	Low Temperature Discharge Protection	-20°C	Settable	Release: -15°C
-	High Discharge Temperature Alarm	65°C	Settable	-
-	Discharge High Temperature Protection	70°C	Settable	Release: 60°C
11	Ambient Temperature Protection	Ambient low temperature alarm: -15°C Ambient low temperature protection: -20°C Ambient low temperature protection release: -15°C Ambient high temperature alarm: 65°C Ambient high temperature protection: 75°C Ambient high temperature protection release: 65°C	Settable	-
12	Low Battery Alarm Condition	SOC 5%	Settable	No alarm when charging
13	Sleep Function	Sleep voltage: 3150mV Delay time: 5min	Settable	Cell voltage difference: 1V
13	Full Charge Cut-off Current	56V	Settable	When both conditions are met, stop charging and update the SOC to 100%

Note: Unless otherwise specified, the above parameters are tested at 25°C ambient temperature.

6. Specifications

Parameter	Value
Battery Type	LiFePO4
Nominal Voltage	51.2V
Nominal Capacity	106Ah
Energy	5427Wh
Continuous Discharge Current	50A
Charge Cut-off Voltage	57.6V
Discharge Cut-off Voltage	41.6V
Maximum Charge Current	50A
Maximum Discharge Current	100A@30min
Peak Discharge Current	120A@10S
Recommend Discharge Current	50A
Open-circuit Voltage	50.88~53.6V
Communication	RS485, RS232, CAN
Display	LCD
Cycle Life	>5000 times (0.5C charge&discharge, 80% DOD @25°C)
Number of series/parallel	Max 8 battery packs in parallel
Certification	UN38.3, MSDS, IEC62619, ROHS
Charge&Discharge Temperature	Charge: 0~+55°C Discharge: -20~+55°C
Storage Temperature Range	-5~+0°C (2 months); 35~+45°C (2 months); 5~+35°C (3 months, Optimum storage temperature); 15~+35°C (6 months)
Relative Humidity	60%±20% RH
Connect Terminal	Quick-plug
Dimension (L x W x H)	531mm x 160mm x 525mm
Net Weight	48.7±0.5kg
IP Class	IP65
Warranty	3 years (See warranty agreement for details)

Repeat the operation method of standard charging and standard discharge 3 times, and take the third result as the initial capacity of the battery.

When the battery is stored for more than 3 months, the storage voltage should be maintained at 52~53.6V.

For long-term storage, charge at least once every 3 months (no less than 30 minutes @ 0.2C).

7. Precautions

Maintenance Precautions

Item	Cycle
If the battery is not in use, it needs to be fully charged and discharged to 50%.	3 months
Check whether the wall bracket installation is loose. Please tighten the appropriate position if available.	6 months
Check the casing for damage. If damaged, please repaint or contact after-sales service center.	6 months
Check exposed wires for wear and tear. If the cable is worn, replace the appropriate cable or contact the service center.	6 months
Check for debris buildup around the battery. Clean it to prevent heat dissipation of the battery.	6 months
Check for water or pests to avoid long-term intrusion and damage to the battery.	6 months