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It's finally here: Porsche puts wireless EV charging into production

39 points by cisc 15d ago

cromka 15d ago
“and claims a charging rate of up to 11 kW and with an efficiency of about 90% for easy overnight charging.” That’s a some 9kW lost on a 80kW battery. I get the convenience, but I think the best use for those would be when standardized and installed in public parking spots, for a brief charge bump, not to charge fully at home, e.g overnight, which is what Porsche aims for.
- cisc 15d ago
  > 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/ev-charger-efficiency-losses/ https://insideevs.com/features/711659/ev-charger-efficiency-...
  - onetwentythree 15d 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 15d ago
      It's 90% from grid to battery.
      - 1970-01-01 15d ago
        It is not. It is "up to 90%" We all know what this means in reality.
        unrented7977 15d 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 14d 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.
- joinHNtheysaid 15d ago
  [dead]
- beAbU 15d ago
  > That’s a some 9kW lost on a 80kW battery. *kWh Using the right units is important.
  - cheschire 15d ago
    "This may sound like one of those overly pedantic fixations... but it's not. Power and energy are very different concepts." -Technology Connections https://www.youtube.com/watch?v=OOK5xkFijPc https://www.youtube.com/watch?v=OOK5xkFijPc
- helsinkiandrew 15d ago
  > not to charge fully at home, e.g overnight, which is what Porsche aims for. Wouldn't an overnight (usually cheaper) 10+ hour charge be a great use for (slow) 11 kW charging?
- solarkraft 15d ago
  It will still be 90% efficient regardless of who uses it. In fact if it is used more, the total losses will be higher. (Some of this becomes clearer when you have a feeling for the units: kW is a measurement of power, not energy)
- Rygian 14d ago
  Charging rate of 11 kW, with efficiency of about 90%, means that the charger sucks around 12.2 kW of power from the grid, of which 1.2 kW is continually lost*, and only 11 kW is effectively being stored in the battery at any point in time. I don't understand the mention about battery capacity (80 kWh, which would translate to around 7½ hours of charging at 11 kW, if a battery could charge at a uniform rate) or where the "9 kW lost" figure comes from. *Which is probably useful to melt snow above the device, when installed outdoors on cold climates.
pornel 15d ago
Charging at home is already more convenient and quicker (in human time) than driving to a gas station, and now they're optimizing the 30 seconds it takes to plug the car in.
- kotaKat 15d ago
  And the funny thing is China's already picked up the dropped torches elsewhere; Xiaomi's going to be launching a robotic arm for your garage by the end of this year to plug in for you. Tesla gave up on their charging tentacle, but, wellp. https://carnewschina.com/2026/06/13/xiaomi-unveils-home-charging-robotic-arm-targeting-q4-2026-launch/ https://carnewschina.com/2026/06/13/xiaomi-unveils-home-char...
  - BoingBoomTschak 15d ago
    Wall-E future here we come. Soon the people loader that lifts you from your sofa and plops you into the seat!
    - thejazzman 15d ago
      I think of this / feel this way when I ride my onewheel instead of walking
  - quickthrowman 15d ago
    Porsche’s induction charging strategy seems a lot smarter and much more reliable than a robot arm.
    - dpark 15d ago
      I don’t know. I’ve stopped using my wireless phone charger because it’s spotty. Sometimes it charges. Sometimes it doesn’t (or barely charges). Sometimes it wakes me up at night because it’s glitching in between charging and noncharging states and my phone feels the need to beep and wake me up. I’ve seen similar issues with multiple watch chargers. “Oh, it didn’t charge overnight again.” I’m not as sold on wireless charging as I once was.
metalman 15d ago
the imaculate lifestyle aproaches, but then in the way of reality, will then prove to be just out of reach, with some new more minor and tedious 'inconvienience' taking on the roll of 'proof' in bieng a victim.
1970-01-01 15d ago
This is something that isn't going to work for two practical reasons: 1. Losses remain very high for daily use. 2. Nobody is going to spend to install these propriety chargers except for millionaires that don't care about the costs. This isn't a luxury charger; it is an exotic charger.
- deleted 15d ago
  [deleted]
- cisc 14d ago
  > Losses remain very high for daily use. It's about the same as wired AC charging: https://insideevs.com/features/711659/ev-charger-efficiency-losses/ https://insideevs.com/features/711659/ev-charger-efficiency-...
thenthenthen 15d ago
We already have several, see the Xiaomi SU7 lineup
ChiperSoft 15d ago
I want to know what mechanisms the car provides to ensure you're lined up to the mat correctly. Seems like a small target to hit.
- IshKebab 14d ago
  Plenty of modern cars have all-round cameras that track what you've driven over. Probably pretty easy if it has that.

39 points by cisc 15d ago

“and claims a charging rate of up to 11 kW and with an efficiency of about 90% for easy overnight charging.” That’s a some 9kW lost on a 80kW battery. I get the convenience, but I think the best use for those would be when standardized and installed in public parking spots, for a brief charge bump, not to charge fully at home, e.g overnight, which is what Porsche aims for.

cisc 15d ago
> 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/ev-charger-efficiency-losses/ https://insideevs.com/features/711659/ev-charger-efficiency-...
- onetwentythree 15d 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 15d ago
    It's 90% from grid to battery.
    - 1970-01-01 15d ago
      It is not. It is "up to 90%" We all know what this means in reality.
      - unrented7977 15d 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 14d 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.
joinHNtheysaid 15d ago
[dead]
beAbU 15d ago
> That’s a some 9kW lost on a 80kW battery. *kWh Using the right units is important.
- cheschire 15d ago
  "This may sound like one of those overly pedantic fixations... but it's not. Power and energy are very different concepts." -Technology Connections https://www.youtube.com/watch?v=OOK5xkFijPc https://www.youtube.com/watch?v=OOK5xkFijPc
helsinkiandrew 15d ago
> not to charge fully at home, e.g overnight, which is what Porsche aims for. Wouldn't an overnight (usually cheaper) 10+ hour charge be a great use for (slow) 11 kW charging?
solarkraft 15d ago
It will still be 90% efficient regardless of who uses it. In fact if it is used more, the total losses will be higher. (Some of this becomes clearer when you have a feeling for the units: kW is a measurement of power, not energy)
Rygian 14d ago
Charging rate of 11 kW, with efficiency of about 90%, means that the charger sucks around 12.2 kW of power from the grid, of which 1.2 kW is continually lost*, and only 11 kW is effectively being stored in the battery at any point in time. I don't understand the mention about battery capacity (80 kWh, which would translate to around 7½ hours of charging at 11 kW, if a battery could charge at a uniform rate) or where the "9 kW lost" figure comes from. *Which is probably useful to melt snow above the device, when installed outdoors on cold climates.

pornel 15d ago

Charging at home is already more convenient and quicker (in human time) than driving to a gas station, and now they're optimizing the 30 seconds it takes to plug the car in.

kotaKat 15d ago
And the funny thing is China's already picked up the dropped torches elsewhere; Xiaomi's going to be launching a robotic arm for your garage by the end of this year to plug in for you. Tesla gave up on their charging tentacle, but, wellp. https://carnewschina.com/2026/06/13/xiaomi-unveils-home-charging-robotic-arm-targeting-q4-2026-launch/ https://carnewschina.com/2026/06/13/xiaomi-unveils-home-char...
- BoingBoomTschak 15d ago
  Wall-E future here we come. Soon the people loader that lifts you from your sofa and plops you into the seat!
  - thejazzman 15d ago
    I think of this / feel this way when I ride my onewheel instead of walking
- quickthrowman 15d ago
  Porsche’s induction charging strategy seems a lot smarter and much more reliable than a robot arm.
  - dpark 15d ago
    I don’t know. I’ve stopped using my wireless phone charger because it’s spotty. Sometimes it charges. Sometimes it doesn’t (or barely charges). Sometimes it wakes me up at night because it’s glitching in between charging and noncharging states and my phone feels the need to beep and wake me up. I’ve seen similar issues with multiple watch chargers. “Oh, it didn’t charge overnight again.” I’m not as sold on wireless charging as I once was.

metalman 15d ago

the imaculate lifestyle aproaches, but then in the way of reality, will then prove to be just out of reach, with some new more minor and tedious 'inconvienience' taking on the roll of 'proof' in bieng a victim.

1970-01-01 15d ago

This is something that isn't going to work for two practical reasons: 1. Losses remain very high for daily use. 2. Nobody is going to spend to install these propriety chargers except for millionaires that don't care about the costs. This isn't a luxury charger; it is an exotic charger.

deleted 15d ago
[deleted]
cisc 14d ago
> Losses remain very high for daily use. It's about the same as wired AC charging: https://insideevs.com/features/711659/ev-charger-efficiency-losses/ https://insideevs.com/features/711659/ev-charger-efficiency-...

thenthenthen 15d ago

We already have several, see the Xiaomi SU7 lineup

ChiperSoft 15d ago

I want to know what mechanisms the car provides to ensure you're lined up to the mat correctly. Seems like a small target to hit.

IshKebab 14d ago
Plenty of modern cars have all-round cameras that track what you've driven over. Probably pretty easy if it has that.