The report states that the maximum sustained current available is 1575 Amps, and the battery voltage was 375 Volts.

The maximum power available is simply the current (Amps) multiplied by the voltage (Volts) --> 1575A * 375V = 590625 Watts.

According to Wikipedia one Horsepower (Electrical) = 746 Watts.

So if we divide the maximum power available 590625W by 746W to give 791.7HP, and not the stated 350HP.
Even allowing for frictional losses this is way of the mark!!

At this discharge rate the 7.5KWh battery would only last for 45.71 SECONDS!!!

This would allow for only 5.6 runs at 8.16s before the battery was fully discharged, and this isn't allowing for the 'warm-up' sessions!!

Now that's geeky!!