2022 RWD Taycan Performance Plus (93.4 kWh)

[B61]

I have an average of 22kwh/100km.
Which is, if I calculated it right, 2.84 miles/kwh.
Or 220 wh/km. Which is probably the scientifically most sensible unit.

As an engineer, it find it annoying, that we did not, collectively, took the opportunity to do this the same way everywhere. We had the chance to switch now to a more sensible, scientific way of expressing car consumption. And we ended up again with Babylon-style chaos and archaic units.
(and on top of that people constantly mixing up kw and kwh)

I’d like to point out my findings, that consumption of energy is actually higher.
For instance, when i charged from 18% to 100%, almost 78 kwh were “filled in”.
Since PB+ has less than 84 kwh, for 82%SoC means 68,88kwh only….

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[ben1]

I’d like to point out my findings, that consumption of energy is actually higher.
For instance, when i charged from 18% to 100%, almost 78 kwh were “filled in”.
Since PB+ has less than 84 kwh, for 82%SoC means 68,88kwh only….

That could be right. You have about 10% charging loses. Energy that is lost in the charger and the battery in heat.

For comparison: an ICE engine loses about 70% in heat. And if you count the whole production cycle for gas: up to 90% of the energy is lost.

 

[B61]

That could be right. You have about 10% charging loses. Energy that is lost in the charger and the battery in heat.

For comparison: an ICE engine loses about 70% in heat. And if you count the whole production cycle for gas: up to 90% of the energy is lost.

In comparision with ICE: so when you fill (and pay) 70 liters of gas, you throw 7 liters during "charging" away...

 

[ben1]

In comparision with ICE: so when you fill (and pay) 70 liters of gas, you throw 7 liters during "charging" away...

For a ICE car, you throw away much more than 7 liters. Of the energy in 70 liters of gas, only 30% goes to actually moving your car. The other 70% is lost in heat. For the production of 70 liter of gas, you need a lot more energy than the energy in 70 liters of gas. In the total cycle from well to the actually moving the ICE car, you only use 10% to move the car.

So losing 10% in charging, is nothing compared to what you loose with a combustion engine.

 

[DerekS]

2021 RWD with PB+, 21" wheels.
Picked it up June 2021.

27678 miles, 3.0 mi/kWh in the aggregate.

I do NOT see anywhere near 3.0 on a day to day basis Many mornings are short trips to Starbucks and it doesn't even get above 2.0.

 

[QueenBean]

Gasoline (Petrol) is also highly volatile, so there are some losses to volatility (fumes) though likely minor if the vehicle is being driven.

 

[B61]

For a ICE car, you throw away much more than 7 liters. Of the energy in 70 liters of gas, only 30% goes to actually moving your car. The other 70% is lost in heat. For the production of 70 liter of gas, you need a lot more energy than the energy in 70 liters of gas. In the total cycle from well to the actually moving the ICE car, you only use 10% to move the car.

So losing 10% in charging, is nothing compared to what you loose with a combustion engine.

I'm not talking about the whole production line.
If I fill 70 liters of gas into ICE, I pay for 70 liters and I use 70 liters, right?
If I charge EV with 77 kwh and I pay for 77 kwh, I use about 70 kwh (or less), right?

 

[Mr Bill]

2021 RWD with PB+, 21" wheels.
Picked it up June 2021.

27678 miles, 3.0 mi/kWh in the aggregate.

I do NOT see anywhere near 3.0 on a day to day basis Many mornings are short trips to Starbucks and it doesn't even get above 2.0.

Same here - 3.8, my 'average' consumption, is something I almost never have achieved in individual trips, and over the past months with outside temperatures going down my trip consumption is consistently WAY higher. Still the aggregate consumption figure sits, and stays, at 3.8...

 

[mandoyoda]

MY21 RWD with PB+, and 21-inch Exclusive Design wheels. Standard charge port. 3500 miles.

3.0 mi per kWh since start. Recently getting 3.4 to 3.6 mi per kWh. Maximum estimated range is 314 miles, but get 290+ regularly.

 

[QueenBean]

MY21 RWD with PB+, and 21-inch Exclusive Design wheels. Standard charge port. 3500 miles.

3.0 mi per kW since start. Recently getting 3.4 to 3.6 mi per kW. Maximum estimated range is 314 miles, but get 290+ regularly.

You might mean 3.0 miles per kWh. kW is a unit of power as in electric motor power, charge rate, and recuperation (regenerative braking)

kWh is a unit of energy as in 93 kWh battery pack, my home uses 12,000 kWh per month, or I get 2.7 miles per kWh of energy.

 

[submatrix]

3.7 mi/kWh, 20" Turbo Aero wheels, 10k miles.

 

[ben1]

I'm not talking about the whole production line.
If I fill 70 liters of gas into ICE, I pay for 70 liters and I use 70 liters, right?
If I charge EV with 77 kwh and I pay for 77 kwh, I use about 70 kwh (or less), right?

Kind of. But not really.

-if you fill up 70 liters of gas, you indeed pay for 70 liters and get 70 liters. But you only use ±21 liter to actually move the car. The rest you use to heat the radiator of the car.
-If you charge with 77 kwh, you pay 77 kwh, you get 77 kwh. But you only use ±70kwh to move the car. The other 10% is used to heat the charger, the battery, the invertor, the motor. A part of that is lost during charging another part during discharging.

So it is very similar.

 

[B61]

Ok, but if we say that an ICE spends 70 liters of gas (since the gas tank holds 70L) and board computer calculates 70L/1000 km, then board comp in EV should take 77 kwh, not 70 only…

 

[mandoyoda]

You might mean 3.0 miles per kWh. kW is a unit of power as in electric motor power, charge rate, and recuperation (regenerative braking)

kWh is a unit of energy as in 93 kWh battery pack, my home uses 12,000 kWh per month, or I get 2.7 miles per kWh of energy.

Thanks, it was a typo. Corrected.

 

[WasserGKuehlt]

Ok, but if we say that an ICE spends 70 liters of gas (since the gas tank holds 70L) and board computer calculates 70L/1000 km, then board comp in EV should take 77 kwh, not 70 only…

Your point is correct, and also moot. It's probably better to calculate efficiency based on the consumed (part of available) energy, irrespective of how that energy was "ingested".

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