4 ms·

> That’s a some 9kW lost on a 80kW battery It's about the same as wired AC charging. There are always charging losses: https://insideevs.com/features/711659/e

• onetwentythree 13d ago
  The 90% efficiency of the wireless transmission would be on top of the efficiency of typical charging (which is mostly losses after the power reaches the vehicle).
  • cisc 13d ago
    It's 90% from grid to battery.
    • 1970-01-01 13d ago
      It is not. It is "up to 90%" We all know what this means in reality.
      • unrented7977 13d ago
        Do we? Because if you're invoking scare quotes, I don't think you have a good grasp on what's actually happening here. 90% is pretty good efficiency at this level of power. One cannot give an exact figure because it depends heavily on environmental factors, primarily temperature. 90% is pretty much exactly what I'd expect to see in the real world under same conditions.
      • randerson 12d ago
        Porsche is famous for underpromising and overdelivering. For instance they claim a 0-60 time of 2.4s for this car. Car & Driver independently tested it and achieved 2.1s. They also claim 298 miles of EPA range (mixed highway & city driving). Car & Driver worked out 300 miles at a constant 75 mph (which is harder on an EV than city driving.) On the base model, which claims 303 miles range, MotorTrend achieved 350 miles of pure highway driving. Pick any Porsche and you'll see that they lie to make things sound worse than they really are.