Lvyuan BC-300 Pro Smart Battery Charger User Manual
Model: BC-300 Pro
1. Introduction
Thank you for choosing the Lvyuan BC-300 Pro Smart Battery Charger. This intelligent pulse repair charger is designed for a wide range of 12V and 24V lead-acid batteries, including WET, MF, EFB, GEL, AGM, and 12V LiFePO4 batteries. It features automatic voltage adaptation, multiple charging current options, and comprehensive protection mechanisms to ensure safe and efficient battery maintenance. Please read this manual thoroughly before use to ensure proper operation and to maximize the lifespan of your battery and charger.
2. Safety Information
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- Always operate the charger in a well-ventilated area.
- Wear eye protection and protective clothing when working with batteries.
- Avoid creating sparks or flames near the battery, as batteries can produce explosive gases.
- Ensure the charger is disconnected from the AC power supply before making or breaking connections to the battery.
- Do not charge frozen batteries.
- Do not attempt to charge 24V LiFePO4 batteries with this device.
- Keep the charger away from water, rain, or excessive moisture.
- Do not operate the charger if it has received a sharp blow, been dropped, or otherwise damaged.
- Keep out of reach of children.
3. Product Overview
3.1. Components
The Lvyuan BC-300 Pro Smart Battery Charger includes the main charging unit with integrated cables for AC input and DC output (battery clamps).


3.2. Display and Controls
The charger features a clear digital display and intuitive buttons for operation.

- Display Screen: Shows Current (A), Voltage (V), Battery Capacity (%), and automatic identification of battery type (Life, GEL, AGM, STD).
- Start/Stop Button: Initiates or halts the charging process.
- AMPS (Current Selection) Button: Selects the desired charging current.
- Battery Selection Button: Chooses the appropriate battery type (e.g., GEL, AGM).
- Repair Mode Button: Activates the pulse repair function.
- Power Switch (Rear): Turns the charger ON/OFF.
- Cooling Fan (Rear): Automatically activates to dissipate heat when internal temperature reaches 104°F/40°C.
4. Specifications
| Feature | Specification (BC-300 Pro) |
|---|---|
| Product Model | BC-300 Pro |
| Net Weight / Gross Weight | 1.75kg / 2.15kg |
| Dimension | 195 x 174 x 120mm |
| Carton Size | 272 x 215 x 127mm |
| Battery Voltage | 12V/24V Automatic Adaptation |
| Applicable Battery Capacity | 15Ah ~ 300Ah |
| Output Current (Value) | 12V: 5A/10A/30A; 24V: 5A/10A/15A |
| Peak Power | 450W |
| Charging Method | Trickle charging + Constant current charging + Constant voltage charging + Float charging mode |
| Working Temperature | Fan activates when internal temperature reaches 114°F/45°C |
| Compatible Battery Types | Lead-acid battery (WET/MF/EFB/GEL/AGM), 12V LiFePO4 battery |
| Protection Features | Short circuit, Reverse connection, Low voltage, Overcurrent, Overcharge, High temperature, Lightning voltage |
| Input Power Cord Length | 59.0 in / 150 cm |
| Output Power Cord Length | 39.4 in / 90 cm |


5. Setup
Follow these steps to set up your Lvyuan BC-300 Pro battery charger:
- Connect to Battery: Ensure the charger is unplugged from the AC power outlet. Connect the red (+) clamp to the positive terminal of the battery and the black (-) clamp to the negative terminal.
- Connect to Power Supply: Plug the charger's AC power cord into a standard wall outlet.
- Power On: Flip the power switch located at the rear of the charger to the 'ON' position. The screen will illuminate and flash in standby mode.

6. Operating Instructions
6.1. Standard Charging
After initial setup:
- Select Battery Type: Press the 'BATTERY' button to cycle through available battery types (e.g., GEL, AGM, STD, LiFePO4). Select the type that matches your battery.
- Select Charging Current: Press the 'CURRENT' button to choose the appropriate charging current (5A, 10A, or 30A for 12V; 5A, 10A, or 15A for 24V). Refer to the charging schedule below for guidance.
- Start Charging: Press the 'START/STOP' button to begin the charging process. The display will show the current, voltage, and battery capacity.
Charging Schedule (BC-300 Pro)
| Charging Current | Battery Capacity Range | Approximate Charging Time |
|---|---|---|
| 5A | 15AH - 50AH | 4.5H - 15H |
| 10A | 30AH - 100AH | 4.5H - 15H |
| 30A (12V) / 15A (24V) | 60AH - 300AH | 4.5H - 15H |

6.2. Interpreting Charging Status

- Charging < 100%, Current Not Reached Set Value: The battery is still charging normally, indicating it is in the earlier stages of charging and has not yet reached its full capacity or the desired charging current.
- Charging = 100%, Current Reached Set Value, Screen Flashing: The battery is fully charged, and the charging process is complete.
6.3. Repair Mode (Pulse Repair)
The BC-300 Pro features a pulse repair mode designed to help restore sulfated or deeply discharged batteries. To activate, select the 'REPAIR MODE' button. This mode uses a special pulse charging technique to break down sulfate crystals and improve battery performance. It is recommended for older batteries or those showing signs of reduced capacity.

7. Maintenance
- Cleaning: Keep the charger clean and free from dust and debris. Use a dry, soft cloth to wipe the exterior. Do not use solvents or abrasive cleaners.
- Cooling Fan: The intelligent cooling fan automatically activates when the internal temperature reaches 104°F/40°C to prevent overheating. Ensure the fan vents are not obstructed during operation.
- Storage: When not in use, store the charger in a cool, dry place, away from direct sunlight and moisture. Ensure all cables are neatly coiled.
- Cable Inspection: Regularly inspect the input and output cables for any signs of damage, fraying, or corrosion. Replace if necessary.
8. Troubleshooting
If you encounter issues with your Lvyuan BC-300 Pro charger, refer to the following common problems and solutions:
- Charger Not Turning On:
- Check if the AC power cord is securely plugged into the wall outlet and the charger.
- Ensure the power switch on the rear of the charger is in the 'ON' position. - Charging Not Starting:
- Verify that the battery clamps are correctly connected to the battery terminals (red to positive, black to negative).
- Ensure the battery type and charging current are correctly selected.
- The charger has protection features (short circuit, reverse connection, low voltage). If any of these conditions are detected, charging will not start. Check for proper connections and battery health. - Charger Overheating:
- Ensure the cooling fan vents are not blocked.
- Operate the charger in a well-ventilated area.
- The intelligent fan cooling system should activate automatically. If it doesn't, or if the charger still overheats, discontinue use and contact support. - Display Errors:
- If the display shows unusual readings or error codes, try disconnecting the charger from both the battery and power, then reconnecting. If the issue persists, contact customer support. - Battery Not Fully Charging:
- Ensure the selected charging current and battery type are appropriate for your battery's capacity and condition.
- Older or heavily sulfated batteries may require the 'Repair Mode' to improve charging efficiency.
9. User Tips
- For optimal battery health, consider using the pulse repair function periodically on older lead-acid batteries to prevent sulfation.
- Always double-check battery polarity before connecting the clamps to avoid reverse connection protection activation.
- When charging a vehicle battery, it's generally recommended to disconnect the battery from the vehicle's electrical system to prevent potential damage to sensitive electronics, unless your vehicle manual states otherwise.
- If charging a battery that has been deeply discharged, allow extra time for the charger to complete its cycle, as the initial stages may be slower.
10. Warranty & Support
The Lvyuan BC-300 Pro Smart Battery Charger comes with a 1-year product warranty from the date of purchase.
For technical support, warranty claims, or any questions regarding the operation of your charger, please contact the manufacturer or your point of purchase. Please have your product model and purchase details ready when contacting support.






