EPEVER LFP5.42KWH51.2V-P65F1QT50 LiFePO4 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.
• 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 shown from different views:

• Front View: Displays indicators and ports labeled A, B, C. A is the Battery SOC indicator, B is the Malfunction indicator, and C is the Running indicator.
• Side View (Left): Shows ports labeled D, E, F, G, H, I. D&K are Metal handles, E&M are Negative connectors, F&N are Positive connectors, G is the Inverter communication interface, H is the Parallel communication interface, and I is the Weak-current switch.
• Black View (Rear): Shows mounting slots labeled J, which correspond to the Wall mounting bracket.
• Side View (Right): Shows ports labeled K, L, M, N, O, P, Q. K is a Metal handle, L is the Grounding screw interface, M is the Negative connector, N is the Positive connector, O is the PC upper computer communication interface, P is the Parallel communication interface, and Q is the Pressure reducing value.

2.2 Product size

The product dimensions are provided in technical drawings. The overall dimensions are approximately 531mm (width) x 525mm (height) x 160mm (depth). Specific mounting hole dimensions and spacing are also detailed.

3 Basic Information

3.1 Interface definition

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

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

DIP Communication Interface (RJ45): Used for parallel communication between lithium battery and lithium battery parallel machine.

BMS Communication Interface (RJ45): Used for communication connection between lithium battery and lithium battery parallel machine.

3.2 Product features

• Functions of single voltage and overall voltage detection, over-voltage and under-voltage alarm and protection.
• Functions of charge and discharge current detection, alarm, and protection.
• Functions of cell, environment, and PCB temperature detection, with alarms and protection for high and low temperatures during charging and discharging.
• Function of detection and protection of output short circuit.
• Battery SOC calculation and charge/discharge cycle calculation.
• Charge balancing function to reduce the charging current of high-voltage cells (reduced current is the balance current set by the BMS).
• LED indicator function displaying current battery SOC, battery fault status, operating status, etc.
• BMS manual and automatic sleep function.
• Charge current limiting function.
• History storage function (capacity of at least 500 records).
• 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, enhancing battery protection.

3.3 LED Indicator

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

There are 12 LEDs on the light board, capable of displaying red, yellow, blue, and green colors, categorized by their function:

4 Instructions

4.1 Packing list

Before unpacking, check the battery for packaging damage and verify the model. Contact the after-sales service center if any abnormality is found. After unpacking, confirm product completeness against packaging information. Contact the after-sales service center for any questions.

• Lithium battery (x1)
• Wall mounting bracket (x1)
• Wall mounting block 1 (x2)
• Wall mounting block 2 (x2)
• Positive output power cable (x1)
• Negative output power cable (x1)
• Positive connector quick plug (x1)
• Negative connector quick plug (x1)
• Battery pack parallel communication cable (x1)
• RS485 communication cable (x1)
• USB-A to RS232 communication cable (x1)
• M8×60 expansion bolt (x4)
• M8×12 bolt group (x2)
• M6×14 bolt group (x17)
• RNB22-8 wiring terminal (x2)

4.2 Installation requirements

a. Space installation distance

Ensure all tools and devices are checked for safety before use. Maintain adequate clearance around the battery unit: at least 500mm on the left and right sides, and at least 300mm on the top and bottom. For parallel installations, minimize the distance between battery packs while maintaining at least 300-500mm clearance on the sides and 500mm on top/bottom.

b. Installation environment

• The battery operates optimally between 20°C and 40°C.
• Avoid installation in environments with direct high temperature and rain.
• Avoid installation near high-temperature heat sources or low-temperature cold sources.
• Avoid installation in locations with drastic ambient temperature changes.
• Avoid installation in strong interference environments.
• Avoid installation in areas 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 Steps)

1. Position the mounting bracket close to the wall, ensure it is level, mark the screw hole locations with a marker, and then remove the bracket.
2. Use a hammer drill to create a hole in the wall (10mm diameter, 65mm depth). Insert an M8 expansion screw and tighten it.
3. Lift the lithium battery vertically and align it with the mounting bracket slots.
4. Push the lithium battery horizontally into the slot of the wall mounting bracket.
5. Gently release the battery, allowing it to snap securely into the wall mounting bracket.

e. Wiring diagram

The wiring diagram illustrates connections for single unit and parallel configurations. It shows the use of specific cables:

• Output power cable (black and red): Connects the positive terminal of the host to the positive terminal of the inverter (red cable) and the negative terminal of the host to the negative terminal of the inverter (black cable).
• RS485 communication cable (blue cable): Facilitates communication between the host and the inverter. The host uses the RS485 port, and the inverter uses the BMS port.
• Lithium battery parallel power cable: Connects the positive terminal of the host to the positive connector of the slave (orange cable) and the negative terminal of the host to the negative connector of the slave (black cable).
• Lithium battery parallel communication cable (green cable): Enables communication between the host and the slave. The host uses the DIP port, and the slave uses the BMS port.

⚠️ Precautions for inverter connection and parallel connection:

Select the correct wiring harness for connection based on the parallel schematic diagram and product appearance.

4.3 Charging operation

⚠️ Warning:

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

1. Check before charging:

• Inspect the appearance of the battery and inverter or other connected equipment to ensure the power cord and all wiring harnesses are connected correctly.
• Ensure 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 the communication cable normally.

⚠️ Warning: Before connecting the battery, ensure that the positive and negative terminals are connected correctly. 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 that 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 will be steady on, the RUN indicator will be on for 0.5 seconds, and the discharge will start for 1.5 seconds.

Standard discharge:

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

4.5 Description of battery parallel capacity and voltage

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 let it stand for more than 30 minutes during charge-discharge conversion to avoid frequent use in a high-temperature environment, as this affects 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 affects 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.

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 any problems affecting the battery or energy storage system are found, please contact the after-sales service department. Disassembly is strictly prohibited.
2. If exposed copper wire inside a conductive wire is found, do not touch it due to the danger of high voltage. Contact the after-sales personnel; disassembly is strictly prohibited.
3. In case of other emergencies, contact the after-sales personnel first. Operate under their guidance or wait for them to operate on site.

8 Disclaimers

The warranty does not apply to the following conditions:

• Damage caused by improper use or inappropriate environments (strictly forbidden to install the Energy Storage System in humid, salt spray, corrosive, greasy, flammable, explosive, dust-accumulative, or other harsh environments).
• Actual current/voltage/power exceeding the limit value of the Energy Storage System.
• Damage caused by working temperature exceeding the rated temperature range.
• Accidents such as electric arc, fire, explosion caused by failure to follow 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

Contact Information

Manufacturer: 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