Comment Re:2 kilowatts? (Score 1) 438
But electric motors have nothing to do with charging the batteries... While electric motors are very efficient compared to the ICE, a more realistic number would be 85-90%. I've seen peak efficiency as high as 98% in some hub motor data sheets, but that's only at particular speeds.
As far as charging efficiency goes, I imagine there are losses from the voltage converter and the internal resistance of the battery cells. How much effect they have, I can't say...