Submitted by dpooga on Fri, 2019-03-29 14:45
New SR+ owner here (3 days), trying to make sense of the energy and battery percentage readings... Stopped at a supercharger today, the battery meter went up to 85%. Drove the car for 15 minutes, checked the trip readings: 6.3 miles, 226 Wh/mi. However, the battery meter dropped to 80% (i.e. by 5%). This makes no sense to me: I spent 6.3*226 ~= 1424 Wh of energy, which should be around 2.7% of the max charge (assuming that the SR+ has a 53 KWh battery). I would expect the battery percentage reading to be a bit more accurate, or could it be that the battery needs to calibrate itself first for better accuracy? If it is indeed calibration, is there a specific calibration procedure / charging pattern that should be followed to help the battery with the calibration (i.e. charge to full, discharge to 10%, etc)?