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 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 an explosion-proof box or an open place, and 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

Front View: Shows the front panel with indicators and connectors.

Side View (Left/Right): Shows the side panels with various interfaces and connectors.

Back View (Black): Shows the back panel.

Interface Labels:

2.2 Product size

The product dimensions are approximately 531mm (Length) x 160mm (Width) x 525mm (Height). Installation dimensions for fastener strips are also provided, indicating specific mounting hole spacings.

3 Basic Information

3.1 Interface definition

RS232 Communication Interface (RJ11): Used to connect to the lithium battery PC's upper computer.

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

DIP Communication Interface (RJ45): Used for parallel communication between lithium batteries.

BMS Communication Interface (RJ45): Used for communication between lithium batteries in parallel.

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.
• Detection and protection of output short circuit.
• Battery SOC calculation, charge and discharge cycle calculation.
• Charge balancing function to reduce charging current for high-voltage cells.
• LED indicator function for 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 enhanced reliability.

3.3 LED Indicator

The L1 to L10 LEDs indicate the State of Charge (SOC) from 0% to 100%.

There are 12 LED lights in total, capable of displaying red, yellow, blue, and green. They are categorized into three types:

4 Instructions

4.1 Packing list

Before unpacking, check the outside of the battery for damage to the packaging and verify the model. If there is any abnormality, do not open the package and contact the after-sales service center immediately. After unpacking, check if the product is complete according to the packaging information. Contact the after-sales service center for any questions.

• Lithium battery (x1)
• Fasteners strips for installation against a wall (x1)
• Fasteners pieces for installation against a wall (x2)
• Connecting plate (x1)
• Positive output power cable (x1)
• Negative output power cable (x1)
• Positive connector quick plug (x1)
• Negative connector quick plug (x1)
• RNB22-8 wiring terminal (x2)
• Battery pack parallel communication cable (x1)
• RS485 communication cable (x1)
• USB-A to RS232 communication cable (x1)
• M8×12 bolt group (x2)
• M6×14 bolt group (x17)
• M8×60 expansion bolt (x2)

4.2 Installation requirements

a. Space installation distance

Ensure all tools and devices are checked for performance and safety before use. Maintain recommended left and right distances between battery packs. Minimize distance where possible.

Diagram Description: Shows recommended minimum distances between stacked battery units (e.g., ≥300mm vertically, ≥500mm horizontally from walls/other units).

b. Installation environment

• The battery operates best at 20~40°C.
• Avoid installation in environments with direct high temperature and rain.
• Avoid installation close to high temperature heat sources or low temperature cold sources.
• Avoid installation in places where ambient temperature changes drastically.
• Avoid installation in strong interference environments.
• Avoid installation in places accessible to children.
• 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

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

d. Space installation requirements (Mounting)

1. Make the mounting bracket close to the wall, ensuring it is level. Mark the screw holes with a marker, then remove the mounting bracket.
2. Use a hammer drill to drill holes in the wall (diameter: 10mm, depth: 65mm). Insert the M8 expansion screws and tighten them.
3. Lift one lithium battery vertically and stack it with another. Use M6×14 screws to lock the fasteners pieces, connecting pieces, and other accessories.
4. Move the stacked and fixed lithium battery packs to the desired position. Align the fasteners strips against the wall, move them horizontally, and affix the fasteners strips. Use four M6X14 screws to lock the lithium battery pack from both sides.

e. Wiring diagram

Diagram Description: Illustrates the wiring connections between two stacked EPEVER batteries, an inverter, and a BMS. It shows the positive and negative power cables, RS485 communication cables, and parallel communication cables. Cable lengths are specified.

• 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, disconnect the communication and cable link with the inverter when storing the battery.
2. During handling and installation, wear safety helmets, goggles, protective shoes, and other suitable safety equipment to prevent accidental injury.
3. All wiring must be carried out by professionals. Using the correct cables is essential for safe and efficient system operation. Use cables provided by EPEVER or those meeting recommended specifications to reduce risk.

4.3 Charging operation

1. Check before charging: Inspect the battery, inverter, and other connected equipment to ensure power cords and wiring harnesses are connected. Verify the power supply meets the battery's specification requirements.
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 correctly 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 should be on, and the SOC indicator should flash to indicate normal charging.

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 should be steady on, the RUN indicator should be 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. It is recommended to stand for more than 30 minutes during charge-discharge conversion to avoid frequent use in high-temperature environments, which can affect battery life.
• When the temperature is low (<0°C) in winter, the depth of battery discharge should be kept below 70% to avoid over-discharge caused by low temperature, which can affect battery life.

⚠️ Warning: This lithium battery should only be used with a 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

The following table details the protection features, their items, factory default parameters, set states, and postscripts.

(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: V1.0

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