Preconditioning & charging planner

[Petzi]

I just did a 1008km trip, pre conditioning is a life saver and makes charging stops like 7 to 14 minutes, if you do not and follow @seabird you will spend way more time plain and simple … he can talk all day long and ignores all the steps I take … but even when you start with a cold battery that hid of 3kwh is meaningless …

Anyway I fast charged my battery to 80% the night before to get it nice and toasty and slow charged to 100% on AC while it was coldish at around 6C, that kept my battery at temp.

If I would not have done that I would have had a 9C battery on departure for my trip, now I had 23C …
PERFECT!

SO MY ROUTINE WORKS, I drove 135km/h when I could and had a consumption of 24.9kwh/100km so I did not loose any on pre conditioning and had FAST CHARGING every time …

If I would have not done my charging routine and pre conditioned I would have lost probably a minute … if I would have followd @seabirds advice would have lost around 20 minutes on the whole trip easily, as I would have lost 10 minutes on my first charge and 2 times 5 minutes on subquential charges, the last 2 would probably equal as the battery would be in ideal temp range.

You don’t need to believe me but it is simple, pre conditioning is needed for this car, less for the new Taycan and Cayenne as they are less temp sensitive, but his car is and you loose way more then some arm chair mathematics will make you believe …

i still do not understand what you are talking about. that is the normal porsche routine what you are doing and not your special invention. you charge the car on ac to 100% before a long trip. you set a departure time so your car is ready for you. then you drive 300km with 135kmh and using the charging planer which precondition the battery —if necessary — for the next charging stop. thats how we all are doing it, thats how it is supposed to be.

Ps: you do not have to „force“ the charging planner to do anything. just choose „porsche charging network „ and you can charge at several diffrent providers either with plug and charge or with the porsche charging card. 0.39c/Kwh.

see: https://assets-v2.porsche.com/int/-...rnational/Charging-Service/PCS-Plus-Pricelist

Sponsored

 

[Yves]

i still do not understand what you are talking about. that is the normal porsche routine what you are doing and not your special invention. you charge the car on ac to 100% before a long trip. you set a departure time so your car is ready for you. then you drive 300km with 135kmh and using the charging planer which precondition the battery —if necessary — for the next charging stop. thats haw we all are doing it, thats how it is supposed to be.

AC charging would not have heated up my battery from 9C to 23C … fast charging it gets it to 40C and AC charging will help it keep temp so it will land around 23C otherwise I would loose all the heat and if you would have seen my other post you would see that also consumption would be lower with a warm battery otherwise I would never had have had 24.9kwh/100km at average speed of above 102km/h (had a traffic jam, but otherwise was driving 135km/h when permitted)

Internal higher resistance aka higher consumption when you drive a colder battery

I will drive back home with a cold battery but conditions will not be the same … will report back. But I will pre condition as I have a friend that already is annoted when I stop more then 10 minutes …

 

[Petzi]

AC charging would not have heated up my battery from 9C to 23C … fast charging it gets it to 40C and AC charging will help it keep temp so it will land around 23C otherwise I would loose all the heat and if you would have seen my other post you would see that also consumption would be lower with a warm battery otherwise I would never had have had 24.9kwh/100km at average speed of above 102km/h (had a traffic jam, but otherwise was driving 135km/h when permitted)

Internal higher resistance aka higher consumption when you drive a colder battery

I will drive back home with a cold battery but conditions will not be the same … will report back. But I will pre condition as I have a friend that already is annoted when I stop more then 10 minutes …

where is this chart coming from ? ( also the loss is less than 1 kw ? per hour ? per 100% charge?)

 

[Yves]

where is this chart coming from ? ( also the loss is less than 1 kw ? per hour ?)

so 1kw extra seems not a lot, but that is 1 to 2 kWh extra per 100km and is why I get 24.9kwh at 130km/h and others get 27 in colder conditions … the chart is a research done by ChatGPT 5.2 on initial internal resistance of NMC batteries and then let it did some research on the total number of cells for the Macan at 800v and it is pretty well in line with my real life consumption related to battery temp … so I double verified it with driving the same test route I have under the same conditions, only variation being battery temp … it really is underestimated, not only fast charging but also capacity and efficiency are impacted

Everyone should decide if it is worth the extra effort, I do and it pays off in my view … stopping 63 minutes instead of 83 … one can debate if that really matters … for me yes.

We all know that colder conditions have higher consumption up to 25 even sometimes 30%, I estimate that battery temp is responsible for around 5% and another 5% in capacity loss so combined it gives … but hey you do not need to believe me (the other 15 to 20 go to heating and wind resistance … you can go seat heating only, but that is not for me)

 

[Petzi]

so 1kw extra seems not a lot, but that is 1 to 2 kWh extra per 100km and is why I get 24.9kwh at 130km/h and others get 27 in colder conditions … the chart is a research done by ChatGPT 5.2 on initial internal resistance of NMC batteries and then let it did some research on the total number of cells for the Macan at 800v and it is pretty well in line with my real life consumption related to battery temp … so I double verified it with driving the same test route I have under the same conditions, only variation being battery temp … it really is underestimated, not only fast charging but also capacity and efficiency are impacted

Everyone should decide if it is worth the extra effort, I do and it pays off in my view … stopping 63 minutes instead of 83 … one can debate if that really matters … for me yes.

We all know that colder conditions have higher consumption up to 25 even sometimes 30%, I estimate that battery temp is responsible for around 5% and another 5% in capacity loss so combined it gives … but hey you do not need to believe me (the other 15 to 20 go to heating and wind resistance … you can go seat heating only, but that is not for me)

precondition needs 3kw/1c

 

[Yves]

precondition needs 3kw/1c

I never saw 3kwh per 1C by that logic I would loose 30% for 10C heating … I never saw that even with a cold battery and if that would be the case my routine would be a hard recommendation As that eliminates 95% of the power needed as the fast charge + AC top up the night before takes care of the cold battery.

Also, but I’m not 100% sure and should look for a more technical review I think pre conditioning also can use heat scavanging, recuperating heat from the engines like Tesla does.

I see some slight elevation in consumption, but as i can charge at 270kw it adds maybe 1 minute at the most in the first charge, as another benefit because of it I heat the battery during such charging sessions easily to 40-45C making the consumption of the car drop further and making pre conditioning for the next stops almost none existant

Sponsored