For integrated electric axles like this one, the mfg quotes axle torque downstream of the 12.x gear reduction, not motor rotor torque. From the motor to the axle, the torque is multiplied by the gear ratio and the speed is divided by the gr, plus a small bit of torque loss due to gear and...
The Slate will likely have a permanent magnet motor. PM motors will act like a generator since they have built-in excitation (the magnets) even when “off” and can generate very high voltages when operated above “base” speed (which I estimate is in the low 40 mph range- working on a model ;)...