Combined peak power is reached at 88kph showing a Bat Power of 425kW.
That is useful because at no point does the sum of front and rear motor power exceed battery power
At the peak battery power you have 425kW = 245kW rear + 180kW front. The rear motor is peaking at 260kW and the front at 190kW.
Assuming that the front motor is 93% efficient, then it's making 177kW peak. Assuming the rear motor is 97% efficient, then it's making 252kW.
Peak combined power = 245*0.97+180*0.93 = 405kW. Pretty close (within 2%) of 397kW.