1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your Keenso 350W 36V/48V Brushless E-Bike Motor Controller. Designed for electric bikes, scooters, and similar electric vehicles, this controller ensures reliable power management and sensitive speed control. Please read these instructions carefully before use to ensure proper function and safety.
2. Product Features
- Constant Speed & Sensitive Control: Provides precise braking and smooth direction changes for consistent performance.
- Protective Aluminum Alloy Design: Features groove-enhanced heat dissipation to safeguard internal circuits against thermal overload, extending product lifespan.
- Easy Installation & Low Malfunction: Clearly labeled interfaces and durable wiring simplify setup, minimizing faults even after prolonged use.
- Robust Specifications: Supports 36V/48V voltage, 350W power, 13A current, 31V/42V low-voltage cutoff, and 60/120-degree motor phase angles.
- Versatile Electric Vehicle Compatibility: Optimized for e-bikes, scooters, and similar EVs.
3. Product Overview
The Keenso Brushless E-Bike Motor Controller is a compact and robust unit designed for efficient power management in electric vehicles. Its aluminum alloy casing provides durability and effective heat dissipation.




4. Installation Guide
The controller features clearly labeled interfaces for straightforward installation. Ensure all connections are secure before operation.


4.1 Wiring Diagram
Refer to the following diagram for detailed wiring instructions. Ensure each connection is made correctly according to the labels.

Important Note: It only fits for motors with sensors. The wires or connectors color may be different from the ads picture due to different production batches. If you are not sure how to wire after receiving the item, please contact customer support.
This video highlights the Keenso 350W 36V/48V Brushless E-Bike Motor Controller, emphasizing that it is designed for motors with sensors. It also notes that wire and connector colors may vary by production batch and advises contacting support if unsure about wiring.
5. Operation
Once correctly installed, the controller manages the power delivery to your e-bike or scooter motor, enabling speed control, braking, and cruise functions. The intelligent recognition phase ensures correct motor rotation. The throttle provides variable speed input, and the brake function offers sensitive control.
This video provides a detailed overview of the Keenso 350W 36V/48V Brushless E-Bike Motor Controller, showcasing its physical appearance, various wire connections, and overall design. It offers a visual introduction to the product's components.
A brief video showcasing the Keenso 350W 36V/48V Brushless E-Bike Motor Controller from multiple angles, highlighting its compact design and the array of wires extending from it. This short clip provides a quick visual inspection of the product.
This video demonstrates the unboxing and initial handling of the Keenso 350W 36V/48V Brushless E-Bike Motor Controller, including a look at the included instruction sheet. It provides insight into what to expect upon receiving the product.
6. Specifications
| Specification | Value |
|---|---|
| Rated Working Voltage | 36V/48V |
| Rated Power | 350W |
| Current | 13A |
| Low Voltage Protection | 31V/42V |
| Suitable Motor Phase Angle | 60/120 degree |
| Product Dimensions | Approx. 9 x 5.3 x 3 cm (3.5 x 2 x 1.18 inches) |
| Item Weight | Approx. 190 g |
| Material | Aluminum Alloy |
| Model Number | VGEBY48uw1hgit23439 |
7. Troubleshooting
If you encounter issues with your controller, consider the following:
- No Power: Check all battery connections and ensure the power switch is engaged. Verify battery voltage is within the supported range (36V/48V).
- Motor Not Responding: Confirm all motor phase cables (A, B, C) and Hall sensor connections are secure and correctly matched. Ensure the intelligent recognition wires are properly connected and have completed the learning process.
- Erratic Speed Control: Inspect the throttle connection and ensure it is functioning correctly. Check for any loose wires or damaged connectors.
- Brake Malfunction: Verify the brake signal wires are correctly installed and not damaged.
- Overheating: Ensure the controller is mounted in a location with adequate airflow to utilize its heat dissipation grooves. Avoid operating the e-bike/scooter beyond its rated power limits.
For persistent issues, consult a qualified technician or contact Keenso customer support.
8. Maintenance
To ensure the longevity and optimal performance of your Keenso E-Bike Motor Controller, follow these general maintenance guidelines:
- Regular Inspection: Periodically check all wiring and connectors for signs of wear, corrosion, or looseness. Tighten any loose connections.
- Keep Clean: Keep the controller unit free from dirt, dust, and moisture. Use a dry cloth to wipe down the exterior. Avoid using harsh chemicals or abrasive cleaners.
- Avoid Physical Damage: Protect the controller from impacts and extreme vibrations. Ensure it is securely mounted.
- Temperature Management: While designed for heat dissipation, avoid prolonged exposure to direct sunlight or extremely high ambient temperatures, which can stress electronic components.
9. Warranty and Support
For warranty information, technical support, or any questions regarding your Keenso 350W 36V/48V Brushless E-Bike Motor Controller, please refer to the product packaging or contact your retailer. Keep your purchase receipt as proof of purchase for any warranty claims.