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15% loss from your meter to the motor, at 100% motor efficiency your are never going to get better than 85%. Lets say the average, not peak, efficiency is 90%. Now you are at 90X85=76.5%
Also no decent regeneration efficiency in any direct drive setup so you only get back say 30% from regeneration, probably less since you can't recover several hundred horsepower seconds of energy in 22 revolutions of the wheels, especially with 2 wheel drive.
regards
Mech
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