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

Side View (A): Shows the left side of the battery unit with a slot for a handle.

Side View (B): Shows the right side of the battery unit, featuring a weak-current switch (C) and a grounding screw interface (M).

Back View (D): Depicts the rear of the battery unit, indicating wall mounting bracket attachment points.

Front View (E): Displays the front of the battery unit with an LCD color screen showing "51.2 V Voltage", "100 Ah Capacity", and "5120 Wh Energy".

2.2 Product size

Diagrams illustrating the battery's dimensions: Height 560±3mm, Width 510±3mm, Depth 180±2mm (with an inner depth of 150±2mm).

3 Basic Information

3.1 Interface definition

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

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

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

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

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.
• Charge balancing function to reduce the charging current of high-voltage cells.
• LCD indicator function displaying current battery SOC, fault status, operating status, etc.
• BMS manual and automatic sleep function.
• Charge current limiting function.
• History storage function (capacity not less than 500 storage).
• 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 LCD color display

Main State Page: Displays battery status, including charge level (e.g., 100%), voltage, current, and operational information.

Parallel Data Page: Shows the status of multiple battery packs, including their voltage, current, and operational state.

Home Page: Features the text "(BMS) Smart Battery Management System" with navigation options for PACK_INFO, STATUS, PROTOCOL, and SYSTEM.

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.

4 Instructions

4.1 Packing list

Before unpacking, check the battery's exterior for packaging damage and verify the model. If any abnormalities are found, do not open the package and contact the after-sales service center immediately. After unpacking, confirm the product's completeness against the packaging information. For any questions, contact the after-sales service center.

• 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 (X1)
• RNB22-8 wiring terminal (X2)
• M8×60 expansion bolt (X4)
• M8×12 bolt group (X2)

4.1 Installation requirements

a. Space installation distance

Ensure adequate clearances for installation. Recommended clearances are ≥500mm on the left and right sides, and ≥300mm on the bottom.

For multiple battery installations, a minimum distance of ≥300mm between battery packs is recommended. Maintain adequate clearances on sides and top (≥500mm) and from the bottom (≥300mm).

b. Installation environment

The battery operates optimally at 20~40°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 areas with strong electromagnetic interference.
• Avoid installation in places accessible to children.
• Avoid installation in areas prone to water accumulation.
• Do not 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 against 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 holes in the wall (10mm diameter, 65mm depth). Insert M8 expansion screws and tighten them securely.
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 diagram illustrates the parallel connection of multiple EPEVER batteries to an inverter. Cable connections are color-coded:

• Positive output power cable (1500mm): Connects the positive terminal of the host to the positive terminal of the inverter (red cable).
• Negative output power cable (1500mm): Connects the negative terminal of the host to the negative terminal of the inverter (black cable).
• RS485 communication cable (1500mm): Facilitates communication between the host and the inverter (blue cable). The host uses the RS485 port, and the inverter uses the BMS port.
• Lithium battery positive parallel power cable (orange cable): Connects the positive connector of the host to the positive connector of the slave.
• Lithium battery negative parallel power cable (black cable): Connects the negative connector of the host to the negative connector of the slave.
• Lithium battery parallel communication cable (green cable): Enables communication between the host and the slave, using the host's DIP port and the slave's BMS port.

Precautions for inverter connection and parallel connection: Select the correct wiring harness 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. Wear appropriate safety gear during handling and installation. All wiring must be performed by professionals. Use company-provided or recommended cables.

1. Check before charging: Inspect the battery and connected equipment (inverter, etc.) to ensure power cords and wiring harnesses are properly connected. Verify that the power supply meets the battery's specifications.
2. Turn off the inverter or other equipment. Connect the positive and negative terminals of the battery and the communication cable. Warning: Ensure correct polarity before connecting the battery; do not reverse connect.
3. Connect the charger to the power supply and turn it on.
4. Start the battery. The POWER indicator should be on, and the SOC indicator should flash, indicating normal charging.

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

Note: All tests in this document are performed at 25±2℃.

4.4 Discharge operation

1. Before discharging, ensure 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: Confirm correct polarity before connecting the load and equipment; do not reverse connect.
3. Turn on the load/inverter or other device.
4. Start the battery. The POWER indicator will be steady on, the RUN indicator will flash for 0.5 seconds, and discharge will commence 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.

Note: All tests in this document are performed at 25±2℃.

Precautions for charging and discharging operation

• When the temperature is high (≥35°C) in summer, limit charging to 0.5C during the day and allow a 30-minute rest period during charge-discharge conversion to prevent battery degradation in high-temperature environments.
• When the temperature is low (<0°C) in winter, limit battery discharge depth to <70% to avoid over-discharge and potential damage.

Warning: This lithium battery must be used only with a manufacturer- or manufacturer-matched compatible inverter or other equipment. Do not use the lithium battery if it fails to communicate with the inverter or other equipment.

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 any problems affecting the battery or energy storage system are found, contact the after-sales service department. Disassembly is strictly prohibited.
2. If exposed copper wire is found within the conductive wire, do not touch it due to high voltage danger. Contact after-sales personnel; disassembly is strictly prohibited.
3. In case of other emergencies, contact 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 (e.g., humid, salt spray, corrosive, greasy, flammable, explosive, or dusty environments).
• Actual current/voltage/power exceeding the Energy Storage System's limit values.
• Damage caused by working temperatures exceeding the rated temperature range.
• Accidents such as electric arc, fire, explosion resulting from failure to follow system labels or manual instructions.
• Unauthorized disassembly and maintenance of the Energy Storage System.
• Damage caused by force majeure events like lightning strikes, rainstorms, mountain torrents, and utility failures.
• Damage incurred during transportation or loading/unloading of the Energy Storage System.

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