EPEVER LiFePO4 Battery Product Manual
Model: LFP5.42KWH51.2V-P65H1QT50
EPEVER
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
Diagram showing the EPEVER LiFePO4 battery from different views (Side, Back, Front) with labeled components.
Front View: Displays voltage (51.2V), capacity (106Ah), and energy (5427Wh). Features LED indicators (L1-L10 for SOC, ALM, RUN) and communication ports.
Side View: Shows a metal handle and mounting points.
Back View: Shows slots for the wall mounting bracket.
Labeled Components:
- A: Weak-current switch
- B: Metal handle
- C: Wall mounting bracket
- D: Battery SOC indicator
- E: Malfunction indicator
- F: Running indicator
- G: Positive connector
- H: Pressure reducing valve
- I: Negative connector
- J: PC upper computer communication interface (RJ45)
- K: Inverter communication interface (RJ45)
- L: Parallel communication interface (RJ45)
- M: Parallel communication interface (RJ45)
- N: Grounding screw interface
2.2 Product Size
Diagram illustrating the physical dimensions of the battery and its mounting bracket.
Overall Dimensions: 470mm (Width) × 610mm (Height) × 190mm (Depth).
Mounting Bracket Dimensions: 350mm (Width) × 450mm (Height). Mounting holes are spaced 310mm horizontally and 460mm vertically.
Installation Clearances: Minimum 500mm from top and sides, 300mm from the bottom.
Parallel Installation Clearance: Recommended distance between battery packs is between 300mm and 500mm.
3 Basic Information
3.1 Interface Definition
(1) RS232 Communication Interface (RJ11): Used to connect the lithium battery to the upper computer of the PC.
| RJ11 Pin | RJ11 Definition |
|---|---|
| 1, 2, 6 | NC |
| 3 | TX |
| 4 | RX |
| 5 | GND |
(2) CAN/RS485 Communication Interface (RJ45): Used for communication connection between the lithium battery and the inverter host.
| Pin No. | RJ45 Definition |
|---|---|
| 1 | RS485-B |
| 2 | RS485-A |
| 3 | GND |
| 4 | CAN-H |
| 5 | CAN-L |
| 6 | NC |
| 7 | RS485-A |
| 8 | RS485-B |
(3) DIP Communication Interface (RJ45): Used for communication connection between lithium battery and lithium battery parallel machine.
| Pin No. | RJ45 Definition |
|---|---|
| 1 | RS485-B |
| 2 | RS485-A |
| 3 | GND |
| 4 | GND |
| 5 | OP+ |
| 6 | NC |
| 7 | RS485-A |
| 8 | RS485-B |
(4) BMS Communication Interface (RJ45): Used for communication connection between lithium battery and lithium battery parallel machine.
| Pin No. | RJ45 Definition |
|---|---|
| 1 | RS485-B |
| 2 | RS485-A |
| 3 | GND |
| 4 | GND |
| 5 | UP-IN |
| 6 | NC |
| 7 | RS485-A |
| 8 | RS485-B |
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 and charge/discharge cycle calculation.
- Charge balancing function to reduce charging current of high-voltage cells (balance current set by BMS).
- LED indicator function for current battery SOC, fault status, operating status, etc.
- BMS manual and automatic sleep function.
- Charge current limiting function.
- History storage function (minimum 500 storage capacity).
- RS485 communication function for real-time monitoring of BMS and battery status.
- Two-stage over-current protection for discharge with different response speeds for improved reliability.
3.3 LED Indicator
The L1 to L10 LED indicators correspond to the battery's State of Charge (SOC) from 0% to 100%.
Diagram showing L1-L10 LEDs representing SOC levels from 10% to 100%, with ALM and RUN indicators.
There are a total of 12 LED lights on the board, capable of displaying red, yellow, blue, and green. They are categorized into three types:
| Light Category | State | Description |
|---|---|---|
| Run-led | Normal state | Green light: solid |
| Charging state | Green light: flashing (1Hz) | |
| Discharge state | Green light: flashing (1Hz) | |
| Alarm-led | Normal State | No alarm or no protection status: off |
| Alarm state | Yellow light: flashing (Over-voltage and under-voltage do not make alarm indications, and do not flash yellow lights) | |
| Protection state | Red light: flashing | |
| Invalid/failure state | Red light: on solid | |
| Power indicator light | Charging state | Blue light: indicates the power level |
| Discharge state | Green light: battery status (low battery) flashing. Flashing frequency: 2 times/second. | |
| Automatic power-on check | Normal state | Describes self-test status: Red running light (sequential increase), Blue running light (sequential increase), Green running light (sequential increase). After fully on, it turns off and starts the next round. |
| Dormancy | All LED lights: off |
4 Instructions
4.1 Packing List
Before unpacking, check the battery packaging for damage and verify the model. If any abnormality is found, do not open the package and contact the after-sales service center immediately. After unpacking, confirm product completeness against the packaging information. Contact the after-sales service center for any questions.
Diagrams of included items.
- 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)
- M8×60 expansion bolt (x4)
- M8×12 bolt group (x2)
- RNB22-8 wiring terminal (x2)
4.2 Installation Requirements
a. Space Installation Distance
Diagram showing required clearances around the battery and between parallel units.
Ensure adequate space for safe operation. Minimum clearances are:
- Top: 500mm
- Sides: 500mm
- Bottom: 300mm
For parallel installation, the distance between battery packs is recommended to be between 300mm and 500mm.
b. Installation Environment
- The battery operates best 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 places with drastic ambient temperature changes.
- 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
Images of various tools required for installation.
Tools include: 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. Wall Mounting Installation Steps
- Position the mounting bracket against the wall, ensure it is level, mark the screw holes with a marker, and then remove the bracket.
- Use a hammer drill to create holes in the wall (10mm diameter, 65mm depth). Insert the M8 expansion screws and tighten them.
- Lift the lithium battery vertically and align it with the mounting bracket slots.
- Push the lithium battery horizontally into the wall mounting bracket slots.
- Slowly release the battery, allowing it to snap securely into the wall mounting bracket.
4.3 Charging Operation
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 specification requirements.
Connection:
- Turn off the inverter or other connected equipment.
- Connect the positive and negative terminals of the battery correctly.
- Connect the communication cable normally.
⚠️ Warning: Before connecting the battery, ensure that the positive and negative terminals are connected correctly. Do not reverse connect.
Charging Process:
- Connect the charger to the power supply and turn it on.
- Start the battery. The POWER indicator should be on, and the SOC indicator should flash, indicating normal charging.
Standard Charging: First, charge the battery to 57.6V with a constant current of 20A (0.2C), then charge at 5A (0.05C) with a constant voltage of 57.6V.
Note: All tests in this document are performed at 25±2°C.
4.4 Discharge Operation
Before Discharging:
- Check that the load and equipment are turned off.
- 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.
Discharging Process:
- Turn on the load/inverter or other device.
- Start the battery. The POWER indicator should be steady on, the RUN indicator should be on for 0.5 seconds, and discharge should 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.
Note: All tests in this document are performed at 25±2°C.
? Precautions for charging and discharging operation:
- When the temperature is high (≥35°C) in summer, the battery should not be charged at 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 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. If 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
| Capacity | Number of Battery Parallel Groups | Maximum Charging Voltage | Discharge Cut-off Voltage |
|---|---|---|---|
| 212Ah | 2 groups | 57.6V | 41.6V |
| 318Ah | 3 groups | 57.6V | 41.6V |
| 424Ah | 4 groups | 57.6V | 41.6V |
| 530Ah | 5 groups | 57.6V | 41.6V |
| 636Ah | 6 groups | 57.6V | 41.6V |
| 742Ah | 7 groups | 57.6V | 41.6V |
| 848Ah | 8 groups | 57.6V | 41.6V |
5 Protection Features
| No. | Item | Factory Default Parameter | Set State | Notes | |
|---|---|---|---|---|---|
| 1 | Cell overcharge protection | Cell overcharge alarm voltage | 3600mV | settable | |
| Cell overcharge protection voltage | 3650mV | settable | |||
| Cell overcharge protection delay | 1.0S | settable | |||
| Cell over-voltage protection release | Cell over-voltage protection voltage | 3380mV | settable | ||
| SOC release | SOC<96% | settable | |||
| Discharge release | Discharge current>2A | ||||
| 2 | Cell over-discharge protection | Cell over-discharge alarm voltage | 3380mV | settable | |
| Cell over-discharge protection voltage | 3380mV | settable | |||
| Cell over-discharge protection delay | 1.0S | settable | |||
| Cell over-discharge protection release | Cell over-discharge protection release voltage | 2950mV | settable | ||
| Release on charge | Plug in the charger to activate | ||||
| 3 | Battery overcharge protection | Battery overcharge alarm voltage | 57.6V | settable | |
| Battery overcharge protection voltage | 58.4V | settable | |||
| Battery overcharge protection delay | 1.0S | settable | |||
| Battery overcharge protection release | Battery overcharge protection release voltage | 54V | settable | ||
| SOC release | SOC<96% | settable | |||
| Discharge release | Discharge current>2A | ||||
| 4 | Overall over-discharge protection | Battery over-discharge alarm voltage | 44.8V | settable | |
| Battery over-discharge protection voltage | 43.2V | settable | |||
| Battery over-discharge protection voltage delay | 1.0S | settable | |||
| Battery over-discharge protection release | Battery over-discharge protection release voltage | 47.2V | settable | ||
| Release on charge | Plug in the charger to activate | ||||
| 5 | Charge over-current protection | Charging over-current alarm current | 105A | settable | |
| Charging over-current protects the current | 110A | settable | |||
| Charging over-current protection delay | 1.0S | settable | |||
| Charge over-current protection release | Automatically disconnects after 1mins | ||||
| Discharge release | Discharge current>1A | ||||
| 6 | Discharge over-current 1 protection | Discharge over-current 1 alarm current | 105A | settable | |
| Discharge over-current 1 Protects current | 110A | settable | Appearing 10 times in a row will lock the state and will no longer be automatically disconnect | ||
| Discharge over-current 1 Protection delay | 1.0S | settable | |||
| Discharge over-current 1 protection release | Automatic disconnect | Automatically disconnects after 1 minute | |||
| Charge disconnect | Discharge current > 1A | ||||
| 7 | Discharge over-current 2 protection | Protection current | >150A | settable | It can be set 10 consecutive occurrences to lock the state without automatically disconnecting |
| Protection delay | 500mS | settable | |||
| Automatic disconnect | Automatically disconnects after 1 minute | ||||
| Charge disconnect | Discharge current > 1A | ||||
| 8 | Short circuit protection | Short-circuit protection function | Available | ||
| Short-circuit release | When there is charging, the short circuit protection is removed. After the load is removed, it is automatically removed. | ||||
| 9 | MOS high temperature protection | Alarm temperature | 90° C | settable | |
| Protective temperature | 115° C | settable | |||
| Release temperature | 85° C | settable | |||
| 10 | Cell temperature protection | Charge low temperature alarm | 5°C | settable | |
| Charge low temperature protection | 0°C | settable | |||
| Charge low temperature protection release | 5°C | settable | |||
| Charging high temperature alarm | 60°C | settable | |||
| Charging high temperature protection | Charging high temperature protection | 65°C | settable | ||
| Charge high temperature protection release | 55°C | settable | |||
| 11 | Ambient temperature alarm | Discharge low temperature alarm | -15°C | settable | |
| Low temperature discharge protection | -20°C | settable | |||
| Discharge low temperature protection release | -15°C | settable | |||
| High discharge temperature alarm | 65°C | settable | |||
| Discharge high temperature protection | 70°C | settable | |||
| Discharge high temperature protection release | 60°C | settable | |||
| 11 | Ambient temperature alarm | Ambient low temperature alarm | -15°C | settable | |
| Ambient low temperature protection | -20°C | settable | |||
| Environmental low temperature protection release | -15°C | settable | |||
| Ambient high temperature alarm | 65°C | settable | |||
| Ambient high temperature protection | Ambient high temperature protection | 75°C | settable | ||
| Ambient high temperature protection release | 65°C | settable | |||
| 12 | Low battery alarm | Low battery alarm condition | SOC<5% | settable | No alarm when charging |
| 13 | Sleep function | Sleep voltage | 3150mV | settable | |
| Delay time | 5min | settable | |||
| Cell voltage difference | voltage difference>1V | settable | Charging and discharging are not allowed | ||
| 14 | Full charge | Full charge voltage | >56V | settable | When both conditions are met, stop charging and update the SOC to 100% |
| Cut-off current | <2A | settable |
Note: Unless otherwise specified, the above parameters are tested at 25°C ambient temperature.
6 Specifications
| Parameter | LFP5.42KWH51.2V-P65H1QT50 |
|---|---|
| Battery Type | LiFePO4 |
| Nominal Voltage | 51.2V |
| Nominal Capacity | 106Ah |
| Energy | 5427Wh |
| Continuous Discharge Current | 50A |
| Charge Cut-off Voltage | 57.6V |
| Discharge Cut-off Voltage | 41.6V |
| Maximum Charge Current | 50A |
| Maximum Discharge Current | 100A@30min |
| Peak Discharge Current | 120A@10S |
| Recommend Discharge Current | 50A |
| Open-circuit Voltage | 50.88~53.6V |
| Communication | RS485 CAN RS232 |
| Display | LED |
| Cycle Life | >5000 times (0.5C charge&discharge 80%DOD @25℃) |
| Number of series/parallel | Max 8 battery packs in parallel |
| Certification | UN38.3 MSDS IEC62619 ROHS |
| Charge&Discharge Temperature | Charge: 0°C~+55℃; Discharge: -20℃~+60℃ |
| Storage Temperature Range | -5°C~+0°C/35℃~+45℃ (≤2month); 5℃~+35℃(≤3 months, Optimum storage temperature); 15℃~+35℃ (≤6 months) |
| Relative Humidity | 60%±20% RH |
| Connect Terminal | Quick-plug |
| Dimension (L x W x H) | 470mm*190mm*600mm |
| Net Weight | 47.6±0.5kg |
| IP Class | IP65 |
| Warranty | 3 years (See warranty agreement for details) |
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
| Item | Cycle |
|---|---|
| If the battery is not in use, it needs to be fully charged and discharged to 50%. | 3 months |
| Check whether the wall bracket installation is loose. Please tighten the appropriate position if available. | 6 months |
| Check the casing for damage. If damaged, please repaint or contact after-sales service center. | 6 months |
| Check exposed wires for wear and tear. If the cable is worn, replace the appropriate cable or contact the service center. | 6 months |
| Check for debris buildup around the battery. Clean it to prevent heat dissipation of the battery. | 6 months |
| Check water or pests to avoid long-term intrusion and damage to the battery. | 6 months |
⚠️ 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 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
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
