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

a) 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).

b) The battery should be safely fixed in a reasonable use environment. The connector must be reliably connected to avoid contact friction caused by arc and sparks.

c) 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.

d) Do not short-circuit the positive and negative poles of the battery, and do not disassemble or assemble the battery to avoid danger.

e) 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.

f) Please dispose of waste batteries safely and properly, and do not put them into fire or liquid.

g) This battery cannot be used in series.

Danger warning

a) It is strictly forbidden to crush, drop, collide, puncture, burn, and other destructive behaviors on the battery.

b) 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.

c) 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.

d) 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

a) 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.

b) If the battery is seriously deformed or the electrolyte leaks due to collision and extrusion, the battery should be placed in an explosion-proof box or an open place, and personnel should be evacuated quickly if conditions permit.

c) 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.

d) 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

Illustration showing the battery unit from different angles: Side view (left and right), Back view showing mounting bracket, and Front view showing the LCD screen and branding.

Labels A, B, C, D are indicated on the diagrams. A points to a connection port on the side, B to a handle, C to the wall mounting bracket on the back, and D to the LCD screen on the front.

A table lists the interface components:

2.2 Product size

Technical drawings illustrating the dimensions of the battery unit. The main unit dimensions are approximately 470mm (width) x 600mm (height) x 190mm (depth). Mounting holes are also indicated with dimensions.

3 Basic Information

3.1 Interface definition

(1) The RS232 communication interface pin definitions are as follows. The RJ11 communication interface is used to connect the lithium battery PC's upper computer.

Illustration of an RJ11 connector with 6 pins.

(2) The pins of the CAN/RS485 communication interface are defined as follows. The RJ45 communication interface is used for the communication connection between the lithium battery and the inverter host.

Illustration of an RJ45 connector with 8 pins, showing pin numbering.

(3) The DIP communication interface pin definition is as follows: RJ45 communication interface is used for parallel communication between lithium battery and lithium battery parallel machine.

Illustration of an RJ45 connector with 8 pins, showing pin numbering.

(4) The BMS communication interface pins are defined as follows, and the RJ45 communication interface is used for the communication connection between lithium battery and lithium battery parallel machine.

Illustration of an RJ45 connector with 8 pins, showing pin numbering.

3.2 Product features

• It has the function of single voltage and overall voltage detection, over-voltage and under-voltage alarm and protection.
• It has the functions of charge and discharge current detection, alarm, and protection.
• It has the function of cell, environment, and PCB temperature detection, and can alarm and protect when charging and discharging at high and low temperatures.
• It has the function of detection and protection of output short circuit.
• With battery SOC calculation, charge and discharge cycle calculation function.
• With a charge balancing function, reducing the charging current of the high-voltage cell (the reduced current is the balance current set by the BMS).
• With LED indicator function, indicating the current battery SOC, battery fault status, operating status, etc.
• BMS manual and automatic sleep function.
• With charge current limiting function.
• With history storage function (not less than 500 storage capacity).
• With RS485 communication function, real-time monitoring of BMS and battery status.
• The two-stage over-current protection function of discharge has different response speeds to different current values, which protects the battery more reliably.

3.3 LCD color display

Interface introduction:

Main state page

Screenshot of the 'Main State' page on the LCD. It shows '100%' battery charge, '51.2V' voltage, 'discharge 100A' current, and 'normal' status. A 'Parallel Data' button is visible.

Parallel Data page

Screenshot of the 'Parallel Data' page. It shows 'Idle' state, '53.04V' voltage, '63A' current, and 'Normal' info. It also displays pack information like 'Pack #01' and numbered packs (16, 01, 02, 03).

Icon Introduction

HOME page

Screenshot of the 'HOME' page. It displays '(BMS) Smart Battery Management System' and menu options: PACK_INFO, STATUS, PROTOCOL, SYSTEM.

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
• X1 Wall mounting bracket
• X1 RS485 communication cable
• X1 Positive output power cable
• X1 Negative output power cable
• X1 Battery pack parallel communication cable
• X1 Positive connector quick plug
• X1 Negative connector quick plug
• X1 USB-A to RS232 communication cable
• X4 M8×60 expansion bolt
• X2 M8×12 bolt group
• X2 RNB22-8 wiring terminal

4.1 Installation requirements

a. Space installation distance

Master and check the performance of all tools and devices to ensure safety before using them.

Diagram showing recommended minimum clearance distances around the battery unit: ≥500mm on the top, sides, and rear; ≥300mm on the bottom. Another diagram shows wall mounting with recommended distances between units (300-500mm horizontally) and from walls (≥500mm).

b. 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.

c. Prepare tools

A grid of images showing various tools required for installation:

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

d. Space installation requirements

1. Make the mounting bracket close to the wall (level correction), mark the screw holes with a marker, and then remove the mounting bracket.

Illustration showing marking screw holes on the wall using the bracket.

2. Use a hammer drill to drill a hole in the wall (diameter: 10mm, depth: 65mm), insert the M8 expansion screw and tighten it.

Illustration showing drilling holes and inserting expansion screws.

3. Lift the lithium battery vertically and align it with the mounting bracket slots.

Illustration showing lifting the battery towards the wall bracket.

4. Push the lithium battery horizontally into the slot of the wall mounting bracket.

Illustration showing sliding the battery into the bracket.

5. Let go slowly and allow the lithium battery to snap into the wall mounting bracket.

Illustration showing the battery secured to the wall bracket.

e. Wiring diagram

Schematic diagram illustrating the wiring connections. It shows an inverter unit, a battery unit, and multiple parallel battery units. Power cables (positive and negative output, parallel power) and communication cables (RS485, parallel communication) are color-coded and labeled with lengths (e.g., 1500mm, 1200mm).

A legend lists the cable types and colors:

• 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:

1. For operational safety and compliance, please disconnect the communication and cable link with the inverter when storing the battery.

2. 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.

3. 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 EPEVER's 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:

a) 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).

b) 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:

1. 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.

2. 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.

3. 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 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 of the Energy Storage System.

Any changes without prior notice! Version number: V1.1