Pre conditioning car and battery from the app.

[Gru]

The current drawn by the PTC heater was 12 to 12.75 A. Guess the heater is wired directly to the 800 volt battery to avoid conversion losses.

yes, wired to 800V battery.

There is no technical reason why you could not have such a ”button”. That is available and works great in the BMW EV’s.

I'm not sure it is (for BMW) or would be (for Porsche) of great use.
Basic users would not understand what it does, advanced users would have no clue when to activate it so the battery would be at perfect temp. (depending of the actual batt. temp).
Very advanced users can achieve that by setting the closest DC charging station as next stop and the heater will run at max. Amp.

In the end, we are talking about saving a few minutes when charging (vs a few more kms in range)

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[Scandinavian]

It has been quite useful when there has been chargers around me when no Ionity stations where anywhere near. And I would not have reached them. In cold wether in northern Sweden it was very valuable since there were HPC but none covered by BMW charging.

Can agree that one might not time it perfectly to start the preheating, being to late. Being to early might heat up the battery to optimal temperature and then switch off once that temperature is reached. Driving may keep enough heat to maintain suitable temperature in the battery.

It was useful for me in the cold.

I guess it is much easier though for the J1.ll since the battery only Needs a much lower optimal temperature?

 

[Scandinavian]

Pure speculation here, but it could have something to do with range ratings. I remember Tesla at some point had disabled the manual ability to turn off regenerative braking in order to keep their EPA range rating. Heating the battery might be similar, it would likely result in lower range, and some regulatory agency might have taken issue with than, given that most consumers don't read manuals and press random buttons all the time. Manual pre-heat would also not be activated at an optimum time, so either too early or too late, again, possibly resulting in reduced range and/or effectiveness of the preheat.

Could very well be linked to ratings.

Can understand it would not be optimal timing perhaps. You may switch it on too late! But too early would not be so huge problem since I guess the system shuts down once the optimal temperature is reached.

It would certainly help out in the wilderness in cold weather when no target HPC can be found in the Navigator.

I also think the car’s automatic preheating will stop functioning once you do not have Connect services any longer. Not sure charger locations will be updated then etc? But not sure how that works?

I have cancelled all Connect services since they were flaky at best and created more issues than what they solved.

 

[whitex]

Could very well be linked to ratings.

Can understand it would not be optimal timing perhaps. You may switch it on too late! But too early would not be so huge problem since I guess the system shuts down once the optimal temperature is reached.

It would certainly help out in the wilderness in cold weather when no target HPC can be found in the Navigator.

I also think the car’s automatic preheating will stop functioning once you do not have Connect services any longer. Not sure charger locations will be updated then etc? But not sure how that works?

I have cancelled all Connect services since they were flaky at best and created more issues than what they solved.

I was just guessing what the reason might be, not even claiming it was good for customers. Turning off regen braking was useful on Teslas too, especially the rear wheel drive versions when it was icy out (Tesla has one pedal driving, regen is tied to lifting the accelerator pedal, so when you let off the accelerator during a turn on ice, it can cause the car to oversteer). But, that would lose them the EPA range rating, so they removed it. It could be that adding manual preheat to battery would also have lost Porsche range rating.

As a workaround, just put the car in Sport+ ahead of arriving at a DC charger, that should preheat the battery.

 

[Gru]

I tested that last winter: range mode vs sport plus.
The heater didn't start in both cases, although batt. temp. was low.

https://www.taycanforum.com/forum/threads/high-consumption-after-first-start.19015/post-293604

 

[Boss Hogg]

I hadn't driven my car for 4 days and it has been cold here and it was covered in ice.

The battery temperature was 3C and charge 77%

I plugged the car in and set the 1 hour preheat though I was actually leaving after 30 minutes.

My dispenser was delivering 7.2 kW, after 30 minutes the battery had been heated to 14C but the charge level had dropped to 75%.

The Webasto heater is rated at 10kW iirc so it looks like it was running flat out heating mainly the battery using more than the mains was dispensing so using a bit of the main battery as well.

My J1 CT 4S did this, it preheated the battery to +13c exactly and every time in winter, from various cold temps -7 to +5c, whenever a departure timer and preheat was set -plugged in or not plugged in. When not plugged in (most of the time) it would use 2-4% of the SoC.

Not had a chance to test the same in the J1.2 yet but will report back.

 

[whitex]

I tested that last winter: range mode vs sport plus.
The heater didn't start in both cases, although batt. temp. was low.

https://www.taycanforum.com/forum/threads/high-consumption-after-first-start.19015/post-293604

It's possible that above 9C battery temp that you reported, the car switches to passive heating. Note that in Range and Normal, 9C (48F) would be within target range, so heating would not even be triggered. From my experience driving other EV (not just Taycan), the quickest way to warm the battery is to do some launches (or as close as you can get). I used to use it if I ever had to DC charge a car after parking in freezing temps, as DC charging a frozen battery can be real slow (though I usually try to avoid that, charge after the arriving at night and maybe top off in the morning before setting off for the next segment). High power acceleration generates more heat in cold battery and motors than the heater could provide, and car can use that heat.

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