Useless planner in MyPorsche app

[Scandinavian]

Here is an example of the useless planning function in MyPorsche app.
It is at present wild winter weather outside with minus 6-8 C and very windy. I wanted to see how well the app would plan a trip to the swedish west coast to visit some family.

Not very successful!
As can be seen the car is charged to 84% with a GOM range of 281 km. Car parked in underground garage and not too cold there.

Plan shows next charging stop after 288 km!!! With still 12 % battery charge? Where did that extra energy come from??

I know the plan will change once sent to the car, but this is just so useless. I can not believe Porsche uses such a senseless planner!

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[RAHRCR]

The only time I see a big change in the GOM is when there is a difference between the temp in my garage vs when I am out on the road. The GOM recalculates for the difference in temp. Otherwise, the GOM has been rock solid for me.

 

[Tooney]

I know the plan will change once sent to the car, but this is just so useless. I can not believe Porsche uses such a senseless planner!

I'm betting you can believe it....

Fortunately the nav in the PCM is pretty helpful for trip planning. I've spent hours sitting in the car using it before a trip. But I wish it had the ability to let me manually enter a starting SoC when planning a trip (as opposed to suggesting the first charging stop based on the car's SoC at the moment.)

 

[anonymouse]

Check any road trip with A Better Route Planner which has a variety of ways that it optimises the route better than most car planners

 

[Scandinavian]

Check any road trip with A Better Route Planner which has a variety of ways that it optimises the route better than most car planners

Exactly what I also use, but I got the address via a text message and wanted to easily transfer that to the car. And that works fine through the app. Then I just wanted to test the route and charge planning. That was not so great.

ABRP is great and gives a very good plan once the settings are right about consumption and charger networks etc. And I can use that with Apple Carplay in the car, but I will not get the preheating etc then. And that is essential in this cold weather.

But to suggest I drive 288 km when the car reports a range of 281 km does not impress.

 

[Perry]

Remember that the range shown in the display is an estimation based on your typical daily driving. There isn't really a single truth to how much range the car actually has. It varies greatly depending on speed, weather, driving style and driving mode. What actually matters is the efficiency for a certain trip.

For what it's worth, with the trip planner, it assumes that you're driving in range mode with relatively conservative speed and acceleration.

Lets just do some quick back-of-the-envelope calculation for what this actually means:

Battery capacity: 83.9 kWh

Your current guessometer says that you have 281 km of range at 84% which means that you have a typical daily driving efficiency in Normal mode of

100*83.9kWh/(281km/0.84) ≈ 25 kWh/100km

The trip planner shows that you will go from 84% -> 12% in 288 km. This means that it assumes that eco driving in Range mode will instead have a range of

x/(x-288km) = 0.84/0.12 <=> x = 336 km

With an efficiency of

100*0.84*83.9kWh/336km ≈ 21 kWh/100km

A bit optimistic, maybe, but doable. My CT Turbo S, gets about 22-23 kWh/100km in practice for longer trips when I drive normally, so 21 kWh/100km is definitely possible with some more conservative driving (maybe not in -40°C weather, of course).

 

[Scandinavian]

A bit optimistic, maybe, but doable. My CT Turbo S, gets about 22-23 kWh/100km in practice for longer trips when I drive normally, so 21 kWh/100km is definitely possible with some more conservative driving (maybe not in -40°C weather, of course).

That is great consumption you get, but I seldom get so low. Maybe heavy right foot?

And here is my recent winter trip in -5 C on a 1000 km round trip. All between 26 and 30 kWh/100 km. And with about 60 km/h. In normal mode though. So very much in line with your calculations.

Which I still was quite impressed by I have to say.

 

[McgR]

I agree. Similar experience. Planning a trip to the alps. 900 km with only 3 charge stops. 280 km between stops using 70 % soc. This is impossible with the current low temperatures. I have done a part of the trip driving 125 km/h in range mode and eco plus AC and still had 28 kWh/100
Km. The others ones I drove up to 150 km/h.

The best predictor is pcm in the car. ABRP is conservative in its estimate so doesn’t run you into trouble.

Saterday our first charger could be at 290 km. First 35 km are downhill. Today predicted range is 255 with 80 % soc. So fully charged and preconditioned and range mode we should make it.

 

[McgR]

A bit optimistic, maybe, but doable. My CT Turbo S, gets about 22-23 kWh/100km in practice for longer trips when I drive normally, so 21 kWh/100km is definitely possible with some more conservative driving (maybe not in -40°C weather, of course).
[/QUOTE]

Wow that’s amazing. With four passengers and luggage on a holiday trip in the winter it is impossible for me to get below 27 kWh/100 km when driving normal speeds 125-130 km/h. In summer I get around 23-24 kWh/100 km but I have drive slowly. What speeds do you drive and do you travel alone ?

 

[Perry]

A bit optimistic, maybe, but doable. My CT Turbo S, gets about 22-23 kWh/100km in practice for longer trips when I drive normally, so 21 kWh/100km is definitely possible with some more conservative driving (maybe not in -40°C weather, of course).

Wow that’s amazing. With four passengers and luggage on a holiday trip in the winter it is impossible for me to get below 27 kWh/100 km when driving normal speeds 125-130 km/h. In summer I get around 23-24 kWh/100 km but I have drive slowly. What speeds do you drive and do you travel alone ?
[/QUOTE]

Note that this is driving on Swedish roads where the speed limit is typically 100-110 km/h with a few stretches of 120 km/h.

 

[Scandinavian]

Wow that’s amazing. With four passengers and luggage on a holiday trip in the winter it is impossible for me to get below 27 kWh/100 km when driving normal speeds 125-130 km/h. In summer I get around 23-24 kWh/100 km but I have drive slowly. What speeds do you drive and do you travel alone ?

Note that this is driving on Swedish roads where the speed limit is typically 100-110 km/h with a few stretches of 120 km/h.
[/QUOTE]
I am driving on Swedish roads but just now between Sto kholm and Sälen, but have nerver been able to get anyway near your consumption. Not even in summer time.

 

[Scandinavian]

The best predictor is pcm in the car. ABRP is conservative in its estimate so doesn’t run you into trouble.

Saterday our first charger could be at 290 km. First 35 km are downhill. Today predicted range is 255 with 80 % soc. So fully charged and preconditioned and range mode we should make it.

UPDATE.

I contacted smartmobilty support via the app. And I got an email response from them! Seems I Need to switch on Recuperation to get that distance to the first charging stop. I copy in their response. I let you decide if you believe this.

Copy:

“””””
Regarding your planning trip feature regarding the screenshots you provided, your vehicle can start the trip with 84% of battery, the battery will charge while you are driving through "regenerative braking", the dissipation of kinetic energy is charging your vehicle while you are driving (https://www.porscheriverside.com/ho...peration: when you take,, off, and auto modes.)

In others words from the screenshot you provided me, you will start your trip with 84% for 288 km then charge the vehicle 13 minutes to charge from 12% to 56% to finish the 206 km remaining and finish your trip with 10% left of battery,

I hope I clarified how work the algorithm of the trip planner, which accurate and trustful,

“”””

The last part will mean I would have a Range in my battery of 206km/ 0.46 equal to 447 km in winter time!

I would love that!

 

[McgR]

One thing that really does make a difference in colder climates is to precondition. I left with a warm cabin but also a battery temp of around 25 degrees. This resulted in good numbers for the first part of the trip. I put the AC in eco pro and the car switched the AC completely off, only ventilation. Cabin temperature was comfortable until the next charge stop. Somewhere further on the trip it switched the AC back on automatically for a comfortable cabin temp.

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