This is for a secondhand e-bike I recently bought. Good quality components, CA v3.12, 16s7p Samsung 30Q triangle battery pack, 12x3077 1500 watts nominal/3500 max. controller.
I noticed the watts reading on the CA main screen starts at 0 at power up, then after several minutes at rest will creep to -8w. I figured out how to zero out the calibration via [ Cal->Zero Amps ] setting, but it must have been calibrated correctly at some time in the past.
Does the -8 watts reading at rest indicate battery deterioration? If not, what could cause the CA watts display to drift?
I noticed the watts reading on the CA main screen starts at 0 at power up, then after several minutes at rest will creep to -8w. I figured out how to zero out the calibration via [ Cal->Zero Amps ] setting, but it must have been calibrated correctly at some time in the past.
Does the -8 watts reading at rest indicate battery deterioration? If not, what could cause the CA watts display to drift?