I see from the first link there is one simple planetary gearset between the motor and the differential.
Quote:
|
A typical efficiency loss in a planetary gearbox arrangement is only 3% per stage. This type of efficiency ensures that a high proportion of the energy being input is transmitted through the gearbox, rather than being wasted on mechanical losses inside the gearbox.
|
Epicyclic gearing - Wikipedia, the free encyclopedia
So 3%? Then add in some bearing and CV joints for, oh, 5%?