Compliance Prerequisites
Adhere to National Standards on Tamper-Proofing: In accordance with current national standards, controllers must not be modified via methods such as cutting wires or using jumpers; they must not contain "backdoors" for speed adjustment; and tampering with speed-limiting parameters (e.g., via decoders) is strictly prohibited to ensure the vehicle remains eligible for registration.
Comply with Vehicle-Specific Speed Limits: Under the New National Standard, the maximum speed for electric bicycles is 25 km/h, and for electric light mopeds, it is 50 km/h. Upgrades must not cause the vehicle to exceed these statutory limits; doing so constitutes illegal modification.
Verify Warranty Coverage: Installing a non-OEM controller may void the manufacturer's warranty for the vehicle's electrical system; consult the brand's after-sales policy regarding modifications before proceeding.
Hardware Compatibility Considerations
Power Matching Principle: The difference between the controller's power rating and the motor's rated power should be kept within ±5%. Oversizing the controller increases energy loss by 12%–15%, while undersizing forces the motor to operate under constant overload, reducing driving range by 20%.
Wiring Specifications: Motor phase wires must be 16 AWG or thicker silicone-insulated wire. Power connectors should utilize gold-plated terminals coated with conductive paste to prevent high contact resistance-which can cause overheating or loose connections-under high-current loads.
Mandatory Heat Dissipation: High-power controllers generate significantly more heat than standard OEM units. Installing a cooling fan is essential; without it, prolonged summer riding can lead to power degradation, thermal current limiting, or even component burnout.
