Help with KT3648/52SVPR Firmware

Zeniaosa

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Sep 3, 2025
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Hi everyone,

I have a Kunteng KT3648/52SVPR controller (sinusoidal, 36/48/52 V, 22 A nominal / 45 A peak, for DD motor ~1500 W). I would like to ask if anyone can help with a firmware that meets my specific requirements.

My goals and requirements:

  1. When the VOC / Speed Limit wire is connected:
    • PAS speed should be strictly limited to 25 km/h (≈15.5 mph).
    • Throttle should be limited to 6 km/h (≈3.7 mph), no more (like Walk Assist).
    • It should not be possible to increase the speed via the display while the wire is connected.

  2. When the wire is disconnected:
    • Throttle and PAS work normally, without limits.

  3. It should work with standard KT displays (e.g., S966 or LCD series).

I don’t have programming knowledge, so I need a ready-made firmware that can be flashed directly using KT-Flash Tool.

If anyone has already done something similar or can help create such a firmware, I would greatly appreciate your assistance and advice.

Thank you very much in advance!
 
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