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Carb lies about EVs efficency.  In ARB/MSD/7-6-94 CARB claims that
battery efficiency is 80%. This is not true!! Charging efficiency
depends on the charge time. From Joule's Law if charged in one hour

it would be
            80x100/20(8/t)(8/t)+80 since t= i hour this is 5.88%

If charged in less time it would be much less!!

It also claims the motor efficiency to be 90%. This is
impossible!!
Every time the motor starts it's efficiency is near ZERO because it
is a constant volt time area device, and when starting both
frequency and voltage are near zero!! The system is also near zero
when the motor starts.
1 The leakage inductance cannot limit the starting current.
2 The magnetizing branch of the motor shunts the load because of
the low frequency. The motor efficiency depends on the number of
stops!!
3 When the motor starts the system efficiency is also near ZERO
because the voltage drop across the inverter semiconductors is
almost the same as that of the motor because it is startin at a low
voltage!!
4 the high motor starting current hurts the battery efficiency and
diminishes it's ampere hour capacity because of the high current.