48V 22A E-Bike Controller
Description
eBike Controller 36V–48V 22A – Sine Wave with Self-Learning for 250W–500W Brushless Motors
Compact sine wave controller with 9 MOSFETs, 36V/48V compatibility and 22A maximum current — designed for 250W–500W brushless gearless motors. A direct replacement or upgrade for low to mid-power conversion kits, with phase self-learning, E-ABS regenerative braking and 3 operating modes in a lightweight, thermally efficient format.
The 22A controller is the most compact in the All4eBikes range and targets 250W and 500W kits directly — 36V and 48V voltages, 22A current and 500W power represent exactly the operating range of these motors. The 9-MOSFET format keeps running temperature low and dimensions minimal, making it ideal for bikes with limited frame or handlebar space — folding bikes, city bikes or smaller frames.
Technical Specifications — 22A 36V–48V Controller
Electrical Parameters
Operating Modes
Supported Connections
9 MOSFETs at 22A — compact format, low operating temperature
At 22A maximum current, the 9-MOSFET configuration keeps operating temperature lower per transistor compared to more heavily loaded designs — each MOSFET handles under 2.5A, reducing thermal stress and extending component lifespan. The IP65 anodised aluminium casing provides passive thermal dissipation and full dust and splash protection, with no fan and no moving parts.
E-ABS braking — controlled braking similar to automotive ABS
The E-ABS (Electronic Anti-lock Braking System) function controls the regenerative braking level to prevent the drive wheel from locking, similar in principle to automotive ABS. When the brake sensors are triggered, the controller gradually reduces regenerative braking current rather than cutting it abruptly, giving more controlled braking while recovering energy at the same time. Particularly useful in wet conditions or during emergency stops.
The lightest controller in the range — fits any bike
The compact format and low weight (under 400g) make this controller ideal for bikes with limited space — folding bikes, city bikes or smaller frames. It mounts discreetly on the frame with velcro or cable ties, without requiring a dedicated bracket or frame modification.
Which Kits It's Recommended For
250W MTX Kit
A direct replacement or sine wave upgrade for the standard controller in the 250W MTX kit — same 22A current, with sine wave, E-ABS and self-learning added.
500W MTX Kit
A compact 36V option for the 500W MTX kit — 22A comfortably covers 500W at 36V and 48V with a good safety margin.
DIY Builds and Upgrades
A universal replacement for any 36V/48V system from 250W to 500W, including e-bikes with a failed controller or upgrades from square wave to sine wave.
Recommended Batteries
At 22A maximum current, the battery must have a BMS rated for at least 20A continuous discharge. Our recommendations:
36V 15Ah Downtube Battery
The compact and accessible option for 36V systems — 20A BMS, ~540Wh, down tube mounting with key lock. View the 36V 15Ah battery.
48V 17.5Ah Downtube Battery
The balanced option for 48V systems — 35A BMS, 50–80 km range, down tube mounting. View the 48V 17.5Ah battery.
Installation and Wiring
Installation Steps
- Connect the motor phase wires (3 wires) to the controller outputs
- Connect the Hall sensor connectors from the motor
- Connect the battery — observe polarity
- Connect the display, throttle, PAS sensor and brake sensors
- Run the self-learning procedure with the wheel lifted before first use
Safety and Maintenance
- Do not cover the casing — passive thermal dissipation requires airflow
- Periodically check phase connector tightness
- Never exceed the BMS discharge limit of the associated battery
- Operating temperature: −40°C to +80°C
