Description:
      X813-AB21C-12 electric bike controller, for use with KD21C communication protocol instruments.
◆ Invisible soft/hard start:
Invisible soft/hard start. Tighten the brake, turn the handle to the end, turn on and wait 3 seconds: a smooth start (default hard start) with memory, repeat the previous operation again to switch to the hard start.

◆ Single/Double Invisible Hall Booster:
 Single/double invisible hallway amplifier. Tighten the brake, turn on, rotate the tensor three times - Dual Hall Boost (only Hall Boost default) with memory, repeat the operation again to change.
Note: It only matches the 3-wire power assist sensor.

◆ Low voltage protection:
When the battery voltage bottoms out to the low voltage value of the controller, it stops the output automatically to protect the battery in time and prevent the battery from being damaged by excessive discharge.

◆ Anti-flight ignition and anti-flight operation:
Prevents the controller from turning on due to a failure in the line or turntable that causes flight phenomena, improves the safety of using the vehicle.

◆ MOS tube short circuit protection:
Automatically detects faults in the MOS tube during ignition to prevent damage to other MOS tubes due to serial short circuits.

◆ Protection at high temperatures:
When the controller's own temperature is too high, it automatically reduces the output current or stops the output

◆ Rotation protection:
When the motor is locked, the control caps automatically limit current, lock when the 2S jack cuts off the circuit, timely protection of the motor and controller.

Specification:

Type: X813-AB21C-12


Weight: 245 g

Current: 18A

Rated voltage: 48V

Size: L98 mm W63 mm H30 mm

Packs 2 ng:
   1 * Brushless motor controller

Our advantages



Pre-Sale Service



        1. Provide free consultation to resolve customer confusion and provide free technical support.



          2. carefully studies customer needs, according to the actual customer installation situation to provide a detailed and suitable solution environment.



Service for Sale



           1. Do our best to meet reasonable customer needs.



           2. 2. Maintain close contact with customers during each trading period.



           3. Cooperate with customers in a friendly way to meet their needs with the highest quality products.



After Sales Service



         1. Train customers on how to install and use electric bikes for free.



         2. Provides one year free warranty for common products.



         3. perfect after-sales service to help customers solve problems in the process of use.



         4. Provides regular tracking service for customers.



 

Shipping                                                                                                                                                                                   



        1. Depending on the location of the item, items will ship from CN stock or US stock. USA within 1-3 business days. 2.



 

         2. In some cases, the shipping date may be delayed due to lack of stock. We will notify you by email.



 

         3. Leave a usable address and phone number in the shipping information. Seller is not responsible for incorrect addresses.



 

          4. Please indicate your personal requirements such as color, packaging, etc. when making payment.



 

        5. 5. We will not be responsible for any delays in the delivery process including but not limited to customs postage checks, strikes, coercive measures, etc. 



 

Return Policy                                                                                                                                                                                        



        1. Returned items must be unused and in the same original condition and packaging as when received.



        2. 2. Once a return is approved, it is the buyer's responsibility to return the product and pack it properly to prevent any damage during shipping.



       3. 3. If you receive an item and are not satisfied, please contact me before returning it. Then return within 30 days for a replacement or refund. Shipping costs will not be refunded.