1. Introduction
The LVYUAN BC-300 Pro is an intelligent pulse repair battery charger designed for a wide range of 12V and 24V batteries, including lead-acid (WET/MF/EFB/GEL/AGM) and 12V LiFePO4 batteries. It features automatic voltage adaptation, multiple charging current options, and advanced protection mechanisms to ensure safe and efficient charging and maintenance of your vehicle batteries.
Figure 1: Front view of the LVYUAN BC-300 Pro Smart Battery 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 ensure proper ventilation when charging batteries.
- Avoid sparks or flames near the battery during charging.
- Wear appropriate personal protective equipment (PPE), such as safety glasses and gloves.
- Do not attempt to charge frozen or damaged batteries.
- Keep out of reach of children.
- Ensure the charger is disconnected from the power supply before making or breaking connections to the battery.
3. Product Overview
The BC-300 Pro features an intuitive display and control buttons for easy operation. It includes a robust cooling system and multiple safety protections.
Figure 2: Labeled diagram of the charger's display and controls
Key Components:
- Display Screen: Shows current, voltage, battery capacity, and identified battery type.
- Start/Stop Button: Initiates or halts the charging process.
- AMPS (Current Selection) Button: Selects the desired charging current.
- Battery Selection Button: Chooses the battery type (LifePO4, GEL, AGM, STD).
- Repair Mode Button: Activates the one-key repair function.
- Power Switch: Turns the unit on/off (located at the rear).
- Cooling Fan: Automatically activates to dissipate heat when internal temperature reaches 104°F/40°C.
Figure 3: Rear view showing power switch and cooling fan
4. Setup and Connection
Follow these steps to safely connect and begin charging your battery:
- Connect to Power Supply: Plug the charger's input power cord into a suitable AC outlet. The screen will flash in standby mode.
- Connect to Battery: Attach the red positive (+) clamp to the positive (+) terminal of the battery and the black negative (-) clamp to the negative (-) terminal of the battery. Ensure a secure connection.
- Power On: Flip the power switch on the rear of the charger to the 'ON' position.
- Select Charging Current: Press the 'AMPS' button to cycle through available charging current options (e.g., 5A, 10A, 30A for 12V; 5A, 10A, 15A for 24V). Choose the appropriate current based on your battery's capacity.
- Select Battery Type: Press the 'BATTERY' button to select the correct battery type (LifePO4, GEL, AGM, STD) that matches your battery.
- Start Charging: Press the 'START/STOP' button to begin the charging process. The display will show charging status.
Figure 4: Connection and operation steps
5. Operating Instructions
5.1. Charging Process
The BC-300 Pro utilizes an intelligent 8-stage charging process (including 4-stage pulse charging) to optimize battery health and longevity. This includes Desulfation, Soft Start, Bulk Charge, Absorption, Battery Test, Recondition, and Float stages.
Figure 5: 4-Stage Pulse Charging Process
Figure 6: Intelligent 8-Stage Charging and Charging Schedule
Charging Status Analysis:
Figure 7: Maintenance status analysis on display
- If the charging process shows less than 100% and the current has not reached the set value, the battery is still charging normally.
- If the charging display shows 100% and the current value has reached the set value, with the screen flashing, it indicates the battery is fully charged and the process is complete.
5.2. One-Key Repair Mode
The repair mode is designed to help restore batteries that have not been used for a long time, batteries with low power that won't start, or old batteries. To activate, press the 'Repair Mode' button.
Figure 8: One-Key Repair Mode functionality
6. Maintenance
- Cleanliness: Keep the charger clean and free from dust and debris. Use a dry cloth to wipe the exterior.
- Storage: Store the charger in a cool, dry, and well-ventilated area when not in use.
- Cable Inspection: Regularly inspect the input and output cables for any signs of damage, fraying, or corrosion. Replace if necessary.
- Ventilation: Ensure the cooling fan and vents are not obstructed to prevent overheating. The intelligent fan cooling system will activate when the internal temperature reaches 104°F/40°C.
Figure 9: Intelligent Fan Cooling and Protection Features
7. Troubleshooting
If you encounter issues with your BC-300 Pro charger, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Charger not turning on | No power from outlet; Power switch off; Damaged power cord. | Check outlet with another device; Ensure power switch is ON; Inspect power cord for damage. |
| Battery not charging | Incorrect battery connection; Battery type not selected; Battery severely discharged or damaged. | Verify correct polarity (+ to +, - to -); Select correct battery type; Attempt repair mode or consult a professional for battery assessment. |
| Display shows error/protection mode | Short circuit; Reverse connection; Overcurrent; Overcharge; High temperature; Low voltage. | Disconnect charger, check connections and battery condition. Allow charger to cool if overheating. Address the specific protection trigger. |
| Charger gets hot during operation | Normal operation (fan will activate); Obstructed ventilation. | Ensure vents are clear; The fan will automatically cool the unit. If excessive, discontinue use and inspect. |
8. Specifications (BC-300 Pro Model)
| Feature | Specification |
|---|---|
| Product Model | BC-300 Pro |
| Net Weight / Gross Weight | 1.75kg / 2.15kg |
| Dimension | 195 x 174 x 120 mm |
| Carton Size | 272 x 215 x 127 mm |
| Battery Voltage | 12V/24V Automatic Adaptation |
| Applicable Battery Capacity | 15Ah ~ 300Ah |
| Output Current (12V) | 5A / 10A / 30A |
| Output Current (24V) | 5A / 10A / 15A |
| Peak Power | 450W |
| Charging Method | Trickle charging + Constant current charging + Constant voltage charging + Float charging mode |
| Working Temperature | Fan activates at 114°F / 45°C |
| Battery Type Compatibility | Lead acid battery (WET/MF/EFB/GEL/AGM), 12V LiFePO4 battery |
| Protection Features | Short circuit protection, Reverse connection protection, Low voltage protection, Overcurrent protection, Overcharge protection, High temperature protection, Lightning voltage protection |
| Input Power Cord Length | 59.0 in / 150 cm |
| Output Power Cord Length | 39.4 in / 90 cm |
Figure 10: Compatible Battery Types (Note: 24V LiFePO4 batteries are prohibited)
9. User Tips
- For optimal battery life, use the appropriate charging current for your battery's capacity. Refer to the charging schedule in Figure 6.
- Regularly check your battery terminals for corrosion and clean them as needed to ensure good contact with the charger clamps.
- If your battery has been deeply discharged, consider using the 'One-Key Repair Mode' to attempt reconditioning before standard charging.
- Always disconnect the charger from the AC power outlet before disconnecting the battery clamps.
10. Warranty and Support
This product comes with a 1-year warranty from the date of purchase. For warranty claims or technical support, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.
For further assistance, please refer to the contact information provided by your seller or visit the official LVYUAN website.
