A megawatt for 8 hours, so 8 megawatt-hours. That's an obscene amount of energy, and probably out by a factor of 8.

Yea, I mean 100 megawatt per hour for ten hours equals 1 megawatt per day of driving.

100 megawatt per hour is a rate of increase of power that means the total amount of energy proportional to the square of the time. I find it unlikely that a reasonable sized vehicle could sustain that rate of increase for long. After ten hours, the power would be 1GW, which would be sufficient to make the vehicle glow quite brightly. The vehicle would have used 5GWh of energy, the equivalent of 50000 battery packs of a Tesla 2017 Model S 100D.

I don't think what you are typing means what you think it means.

Sorry, 100 kilowatts per hour. it is a typo.