EPEVER LiFePO4 (LFP) Battery

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.
• It is forbidden to heat and incinerate batteries. It may melt battery components, lose safety features, or burn electrolyte. Overheating can deform, heat, smoke, or burn the battery.

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

2.1 Appearance

The battery unit is a rectangular enclosure with rack-mountable handles on the sides. The front panel features various ports and indicators. The top and side views show the overall dimensions and mounting points.

Front Panel Components:

• Metal handles (A, L): For carrying and mounting.
• Battery rack fixed ears (B, K): For securing the battery in a rack.
• Positive connector (C): For connecting the positive terminal.
• Power indicator (D): Shows power status.
• Reset switch (E): For resetting the system.
• DIP switch (F): For configuration settings.
• Dry contact (G): For external signaling.
• Colored touchable LCD (H): Displays battery status and allows interaction.
• Weak-current switch (I): Controls low-current functions.
• ON/OFF button: Powers the unit on or off.
• BATT+ and BATT- terminals: Main battery connections.
• Communication ports: RS485, CAN, RS232, BMS.
• Grounding screw (M): For safety grounding.
• Parallel communication interface port (N): For connecting batteries in parallel.
• PC upper computer interface port (O): For connecting to a PC.
• Inverter communication interface port (P): For connecting to an inverter.
• Battery SOC indicator (Q): Shows State of Charge.
• Malfunction indicator (R): Indicates errors.
• Run indicator (S): Shows operational status.

2.2 Product size

The battery has dimensions of 516mm (width) x 510mm (height) x 150mm (depth), with specific measurements indicated in the diagrams (e.g., 535±2mm overall width, 90mm height for rack ears, 150±2mm for rack ears).

3 Basic Information

3.1 Interface definition

RS232/RJ11 Communication Interface: Used to connect to the upper computer (PC).

CAN/RS485 Communication Interface (RJ45): Used for communication between the lithium battery and the inverter host.

BMS Communication Interface (RJ45) for Parallel Connection (Slave): Used for parallel communication between lithium batteries.

BMS Communication Interface (RJ45) for Parallel Connection (Host): Used for parallel communication between lithium batteries.

3.2 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 alarm and protection for high and low temperatures during charging and discharging.
• Output short circuit detection and protection.
• Battery SOC calculation, charge and discharge cycle calculation function.
• Charge balancing function to reduce the charging current of high-voltage cells.
• 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 (capacity not less than 500).
• RS485 communication function for real-time monitoring of BMS and battery status.
• Two-stage over-current protection for discharge with different response speeds for reliability.

3.3 LED Indicators

Battery Work Indicators Instructions:

Battery SOC Indicators (Charging):

Battery SOC Indicators (Discharging):

Indicator Flash Descriptions:

• [Flash 1]: Indicator lights up for 0.25 seconds, then turns off for 3.75 seconds.
• [Flash 2]: Indicator lights up for 0.5 seconds, then turns off for 0.5 seconds.
• [Flash 3]: Indicator lights up for 0.5 seconds, then turns off for 1.5 seconds.

3.4 Colored touchable LCD

The LCD screen provides an interface for monitoring and controlling the battery system.

Interface Introduction:

• HOME page: Displays the main menu with options like PACK_INFO, STATUS, PROTOCOL, and SYSTEM.
• Main state page: Shows the current battery status, including State of Charge (e.g., 100%), current, voltage, and information. It also displays parallel data, showing individual pack information and status.

Icon Introduction:

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

Menu Structure:

The menu allows navigation through various settings and information:

• Main state page: SOC (Total), Current, Voltage, BMS INFO, Warranty.
• Parallel data: SOC, Current, Voltage, BMS info.
• PACK Info: Voltage (Cell 01 to Cell 16), Temperature (NT1, NT2, NT3, NT4, Mos-T, ENV-T).
• Home: BMS Status (Warning, Protect, Fault, Record), CAN (GOOD WE PROTOCOL).
• PROTOCOL: Lists various communication protocols for different inverters and BMS systems (e.g., LV BMS Protocol (CAN) for Solar, PYLON PROTOCOL 2.0, SMA PROTOCOL, Growatt BMS, etc.).
• System: Language select (English, Chinese, Traditional Chinese), PACK SN, (BLUETOOTH SN).

Note on Protocol Change: Changing the protocol requires entering a permission password (initial password: 123456). The setting takes effect after exiting the interface and re-verifying permissions if modified again.

3.5 Set the DIP Switch

The DIP switch is used to set the communication address for batteries in parallel operation. Each battery must have a unique address. Address 1 is designated as the main battery in parallel mode. If batteries are not in parallel, the default DIP setting is 1.

4 Instructions

4.1 Packing list

Before unpacking, please check the outside of the battery for damage to the packaging and check the model of the battery. If there is any abnormality, please do not open the package and contact the after-sales service center as soon as possible. After unpacking the battery, please check whether the product is complete according to the packaging information. If you have any questions, please contact the after-sales service center as soon as possible.

• X1 Lithium battery
• X2 Battery rack fixed ears
• X1 USB-A to RS232 communication cable
• X1 Battery pack parallel communication cable
• X2 RNB22-8s wiring terminal
• X2 RNB22-6s wiring terminal
• X5 M6×12 bolt group

4.2 Installation requirements

a. Installation environment

• The battery works best at 20~40°C.
• Avoid installation in environments with direct high temperature and rain.
• Avoid installation close to high temperature heat source or low temperature cold source.
• Avoid installation in places where the ambient temperature changes drastically.
• Avoid installation in strong interference environments.
• Avoid installation in places where children can enter.
• Avoid installation in places where water is likely to accumulate.
• It is forbidden to place flammable and explosive materials around the equipment.

b. Prepare tools

The following tools are recommended for installation:

• 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

c. Wiring diagram

The wiring diagram illustrates connections for single units and parallel configurations with an inverter. Specific cables are color-coded and described:

• Positive output power cable (1500mm)
• Negative output power cable (1500mm)
• RS485 communication cable (1500mm)
• Lithium battery positive parallel power cable (200mm)
• Lithium battery negative parallel power cable (200mm)
• Lithium battery parallel communication cable (BMS~BMS) (200mm)

Precautions for inverter connection and parallel connection:

1. Output power cable (black and red cables): The positive connector of the host is connected to the positive terminal of the inverter (red cable); the negative connector of the host is connected to the negative terminal of the inverter (black cable).
2. RS485 communication cable (blue cable): Communication between the host and the inverter. The interface of the host is RS485 port, and the terminal port of the inverter is BMS port.
3. Lithium battery parallel power cable: The positive connector of the host is connected to the positive connector of the slave (orange cable); the negative connector of the host is connected to the negative connector of the slave (black cable).
4. Lithium battery parallel communication cable (green cable): Communication between the host and the slave. The interface of the host is BMS port, and the interface of the slave is BMS port.

Warning:

• For operational safety and compliance, please disconnect the communication and cable link with the inverter when storing the battery.
• During the handling and installation of the battery, it is recommended to wear safety helmets, goggles, protective shoes, and other safety equipment suitable for the work to prevent accidental injury.
• All wiring must be carried out by professionals. With the right cables, the battery connection is essential for the safe and efficient operation of the system. In order to reduce the risk, please use the cable provided by EPEVER, or their recommended cable specifications.

4.3 Charging operation

1. Check before charging: Inspect the appearance of the battery and inverter or other connected equipment to ensure that the power cord and all wiring harnesses are connected. Make sure the power supply meets the specification requirements for the battery.
2. Turn off the inverter or other equipment, connect the positive and negative terminals of the battery, and connect the communication cable normally. ⚠️ Warning: Before connecting the battery, ensure that the positive and negative terminals are connected. Do not reverse connect.
3. Connect the charger to the power supply and turn on the charger.
4. Start the battery; the POWER indicator is on, and the SOC indicator flashes to start charging normally.

Standard Charging:

First, charge the battery to 57.6V with a constant current of 20A (0.2C), and then charge to 5A (0.05C) with a constant voltage of 57.6V.

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

4.4 Discharge operation

1. Before discharging, check whether the load and equipment are turned off.
2. Properly connect the positive and negative terminals of the battery to the load/inverter or other equipment. ⚠️ Warning: Before connecting the load and equipment, please confirm the positive and negative wiring of the battery, and prohibit reverse connection.
3. Turn on the load/inverter or other device.
4. Start the battery. The POWER indicator is steady on, the RUN indicator is on for 0.5 seconds, and the discharge starts for 1.5 seconds.

Standard discharge:

After the battery is standard charged, discharge the battery with a constant current of 20A (0.2C) till the battery voltage drops to 41.6V.

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

Precautions for charging and discharging operation:

• When the temperature is high (≥35°C) in summer, the battery should not be charged more than 0.5C during the day, and it is recommended to stand for more than 30 minutes in the middle of the charge-discharge conversion to avoid the battery being used often in a high-temperature environment (a high-temperature environment will affect the battery life).
• When the temperature is low (<0 °C) in winter, the depth of battery discharge <70% to avoid over-discharge of the battery caused by too low temperature and affect the 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.

4.5 Description of battery parallel capacity and voltage

5 Protection Features

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

6 Specifications

① Repeat the operation method of standard charging and standard discharge 3 times, and take the third result as the initial capacity of the battery.

② When the battery is stored for more than 3 months, the storage voltage should be maintained at 52~53.6V.

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

7 Precautions

7.1 Maintenance precautions

Warning:

• If you find any problems that may affect the battery or the battery and energy storage system, please contact the after-sales service department; disassembly is strictly prohibited.
• If you find that the copper wire inside the conductive wire is exposed, please strictly prohibit touching it due to the danger of high voltage. Please contact the after-sales personnel; disassembly is strictly prohibited.
• If there are other emergencies, please contact the after-sales personnel first, operate under the guidance of the after-sales personnel, or wait for the after-sales personnel to operate on site.

8 Disclaimers

The warranty does not apply to the following conditions:

• Damage caused by improper use or inappropriate environments (It is strictly forbidden to install the Energy Storage System in the humid, salt spray, corrosive, greasy, flammable, explosive, dust accumulative, or other harsh environments).
• The actual current/voltage/power exceeds the limit value of the Energy Storage System.
• Damage caused by working temperature exceeding the rated temperature range.
• Electric arc, fire, explosion, and other accidents caused by failure to follow the Energy Storage System labels or manual instructions.
• Unauthorized disassembly and maintenance of the Energy Storage System.
• Damage caused by force majeure such as lightning strikes, rainstorms, mountain torrents, and Utility failures.
• Damage occurred during transportation or loading/unloading the Energy Storage System.

Any changes without prior notice! Version number: V1.0

Contact Information

HUIZHOU EPEVER TECHNOLOGY CO., LTD

BeiJing Service Hotline: 010-82894896/82894112

Huizhou Service Hotline: 0752-3889706

Shenzhen Service Hotline: 0755-89236770

E-mail: sales@epever.com

Website: www.epever.com.cn