1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your BAFANG G020 500W E-Bike Conversion Kit. This kit is designed to convert a standard bicycle into an electrically assisted bicycle, offering enhanced performance and versatility for various riding conditions. Please read this manual thoroughly before installation and use to ensure safe and optimal performance.
2. Safety Information
⚠️️ Please mind potential fire risk and strictly follow the instruction manual for charging and storage.
- Always wear a helmet and appropriate safety gear when riding your e-bike.
- Ensure all connections are secure and properly insulated before riding.
- Do not modify the motor or controller system. Unauthorized modifications can lead to malfunctions and void the warranty.
- Be aware of local regulations regarding e-bike usage, speed limits, and power output.
- Regularly inspect your e-bike for any signs of wear, damage, or loose components.
- Keep the battery away from heat sources and flammable materials.
3. Package Contents
Your BAFANG G020 500W E-Bike Conversion Kit includes all necessary components for conversion. Please verify that all items listed below are present in your package:
- 48V 500W Rear Wheel Hub Motor (Cassette type) with pre-built rim (suitable for 135-142mm rear wheel dropout)
- Control Unit and Control Unit Box
- Thumb Throttle
- Left Pedal Assist System (PAS) Sensor
- Waterproof 1T4 Main Wiring Harness
- Headlights
- Installation Tools
- Optional: LCD Display (various models available, e.g., EKD01, DZ40 Mini, SW2-M58, 500C, DPC18)
4. Specifications
The following table details the specifications for the BAFANG G020 500W Hub Motor and related components:
| Attribute | Value |
|---|---|
| Bafang Model | H400 |
| Wattage | > 400w (500W Rated, 750W-800W Peak) |
| Design | Brushless |
| Voltage | 48V (also compatible with 36V) |
| Brand Name | BAFANG |
| Motor Type | Brushless Gear Hub Motor |
| Certification | CE |
| Origin | Mainland China |
| Model No | H400B |
| Wheel Size Compatibility | 20/26/27.5/700C/28/29 inches |
| Rated Voltage (DCV) | 36V / 48V |
| Rated Power (W) | 500W |
| Noise Grade (dB) | <55dB |
| Spoke Specification | 36H * 12G |
| Usage | eTour, eCity, eRoad |
| Efficiency (%) | 80% |
| Construction | Gear drive |
| Brake Compatibility | Disc Brake |
| Operation Temperature | -20℃-45℃ |
| Waterproof Grade | IP X5 |
| Salt Spray Test Standard (h) | 96h |
| Suitable Rear Dropout Size | 135-142MM |
| Suitable Front Dropout Size | 100MM |
5. Installation Guide
Careful installation is crucial for the performance and safety of your e-bike. Follow these steps:
5.1. Pre-installation Checks
- Wheel Size Verification: Ensure the conversion kit's wheel size matches your bicycle. Refer to the tire sidewall for your bike's wheel size (e.g., 26x1.95).
How to choose the suitable wheel size. - Dropout Measurement: Measure your bike's rear and front dropout sizes to ensure compatibility with the hub motor. The rear hub motor requires a 135-142mm dropout, and the front hub motor requires a 100mm dropout.
Measuring bicycle dropout widths. - Brake Type: This kit is designed for disc brakes and a cassette-type flywheel for the rear hub motor. It is not compatible with rotary or freewheel domes.
5.2. Component Placement Overview
The following diagram illustrates the typical placement of the e-bike conversion kit components on a bicycle:
5.3. Wiring Diagram
Follow this wiring diagram carefully to connect all components. Ensure all connectors are firmly seated and waterproofed where applicable.
Key Connections:
- Hub Motor: Connects to the controller.
- PAS Sensor: Mounts near the pedal crank and connects to the controller.
- 1T4 Cable: This main wiring harness connects the controller to the display, throttle, and brake levers/sensors.
- Controller: The central unit, connecting to the motor, battery, and all control components.
- Battery (Optional): Connects to the controller.
- Headlight: Connects to the main wiring harness or controller.
- Brake Lever/Sensor: Connects to the main wiring harness.
- Thumb Throttle: Connects to the main wiring harness.
- Display (Optional): Connects to the main wiring harness.
6. Operating Instructions
6.1. Cycling Modes
Your BAFANG e-bike conversion kit offers four flexible cycling modes:
- Pure Electric Mode: Ride without pedaling, using only the motor's power via the thumb throttle.
- Pedal Assistance Mode (PAS): The motor provides assistance as you pedal, making long distances and uphill climbs easier.
- Boost Mode: Facilitates pushing your bike when loading or walking uphill.
- Regular Bike Mode: Ride your bicycle as a traditional bike, with no motor assistance.
Combine these modes as needed to tailor your cycling experience to your preferences and terrain.
6.2. Display Operation
The intelligent LCD display allows you to monitor your cycling statistics and control various settings. Different display models offer varying features:
Each display typically allows you to:
- View current speed, distance, and battery level.
- Adjust Pedal Assist System (PAS) levels (e.g., 0-9 levels).
- Turn the system on/off.
- Control headlights (if connected and supported by the display).
- Access settings and diagnostics.
For specific instructions on your display model, please refer to its individual manual.
6.3. Product Video
Watch this video for a visual guide on the BAFANG e-bike system in action:
7. Maintenance
Proper maintenance ensures the longevity and safe operation of your e-bike conversion kit:
- Regular Cleaning: Keep the motor, controller, and battery clean and free from dirt and debris. Use a damp cloth; avoid high-pressure washing directly on electrical components.
- Connection Checks: Periodically check all electrical connections for tightness and corrosion. Ensure waterproof connectors are properly sealed.
- Battery Care: Store the battery in a cool, dry place. Avoid extreme temperatures. Follow the manufacturer's guidelines for charging and discharging to maximize battery life and prevent fire risks.
- Brake Inspection: Regularly inspect your disc brakes for wear and proper function. Ensure brake levers are responsive.
- Tire Pressure: Maintain correct tire pressure for optimal performance and safety.
- General Bicycle Maintenance: Continue to perform regular maintenance on your bicycle's mechanical components (chain, gears, frame, etc.) as you would with a non-electric bike.
Controller Dimensions: The controller unit measures approximately 9cm (length) x 5cm (width) x 3cm (height). The controller box is designed to house this unit securely.
8. Troubleshooting
If you encounter issues with your BAFANG G020 E-Bike Conversion Kit, consider the following common problems and solutions:
- Motor Not Engaging:
- Check all electrical connections, especially the motor, battery, and controller.
- Ensure the battery is charged and properly connected.
- Verify the PAS sensor is correctly installed and aligned.
- Check the display for any error codes.
- No Power to Display:
- Ensure the battery is charged and connected.
- Check the main power cable from the battery to the controller.
- Inspect the display cable for damage or loose connections.
- Incompatible Brakes (Hydraulic): The kit is designed for mechanical disc brakes. While it may be possible to adapt it for hydraulic brakes, ensure compatibility with your specific hydraulic brake system or consult a professional e-bike technician for assistance.
- Controller Type (Sine Wave vs. Square Wave): The controller type (sine wave for smoother operation, square wave for more abrupt power) is typically specified in the product details. If you experience unexpected power delivery, verify the controller type and ensure it matches your expectations.
If the problem persists, contact customer support for further assistance.
9. User Tips
- Accurate Measurements: Always double-check your bicycle's wheel size and dropout measurements before purchasing and installing the kit to ensure a perfect fit.
- Secure Connections: After initial installation and periodically thereafter, inspect all wiring connections to ensure they are tight and properly seated. Loose connections can lead to intermittent power or component failure.
- Optimize Riding Modes: Experiment with the different cycling modes (Pure Electric, Pedal Assist, Boost, Regular Bike) to find the most efficient and comfortable setting for various terrains and personal preferences.
- Battery Management: For optimal battery life and safety, avoid fully draining the battery frequently and store it at a partial charge (around 50-70%) if not used for extended periods.
10. Warranty and Support
Your BAFANG G020 E-Bike Conversion Kit comes with a one-year warranty. For any technical support or issues, please contact our customer service. We have professional technicians in Europe (France, Poland, Germany, Spain, Italy) who can provide assistance and help resolve problems.