300A firmware5.2 download (Caution! Not in Warranty Protection) Remark: According to customer feedback that Ubox can work for more than 100A hardware, but if you want to use 300A firmware, you can try it , welcome your feedback!
Reminds: we recommend to use Spintend custom 100A firmware, if you're using stock firmware, there's battery voltage reading discrepancy and relative symptom.
8. Ubox source code ,customed from VESC-Project. Refer here.