T-Hybrid & CTEK
Rennlist Member
Joined: Dec 2023
Posts: 101
Likes: 65
From: AZ
@Abdulrahman It would be great to hear from you with regard to the 400V Hybrid battery usage in a hot climate.
Some baseline context:
Porsche recommends the car is parked in ambient below 86F.
The 400V apparently has a cooling system to keep it below 108F.
Need to maintain 30%(?) charge to avoid issues with restart?
...In much of the Southern US, the temp number of 86F isn't feasible in the summer...especially for me in AZ.
By now in Riyadh, I assume it is rather warm(as it is in AZ).
A few Qs for you:
Have you had a 400V battery temperature warning while you were driving OR parked the car after a drive?
If you park the car outside(or in a non-AC garage) the ambient is likely 90-100F at some times of the day...do you get any warnings?
Have you ever noticed if the battery cooling system engages while the car is parked(presumably can get above 108F if parked in the sun)?
Thanks in advance.
Some baseline context:
Porsche recommends the car is parked in ambient below 86F.
The 400V apparently has a cooling system to keep it below 108F.
Need to maintain 30%(?) charge to avoid issues with restart?
...In much of the Southern US, the temp number of 86F isn't feasible in the summer...especially for me in AZ.
By now in Riyadh, I assume it is rather warm(as it is in AZ).
A few Qs for you:
Have you had a 400V battery temperature warning while you were driving OR parked the car after a drive?
If you park the car outside(or in a non-AC garage) the ambient is likely 90-100F at some times of the day...do you get any warnings?
Have you ever noticed if the battery cooling system engages while the car is parked(presumably can get above 108F if parked in the sun)?
Thanks in advance.
Thread Starter
Instructor
Joined: Jul 2024
Posts: 119
Likes: 163
From: Riyadh, Saudi Arabia
@Abdulrahman It would be great to hear from you with regard to the 400V Hybrid battery usage in a hot climate.
Some baseline context:
Porsche recommends the car is parked in ambient below 86F.
The 400V apparently has a cooling system to keep it below 108F.
Need to maintain 30%(?) charge to avoid issues with restart?
...In much of the Southern US, the temp number of 86F isn't feasible in the summer...especially for me in AZ.
By now in Riyadh, I assume it is rather warm(as it is in AZ).
A few Qs for you:
Have you had a 400V battery temperature warning while you were driving OR parked the car after a drive?
If you park the car outside(or in a non-AC garage) the ambient is likely 90-100F at some times of the day...do you get any warnings?
Have you ever noticed if the battery cooling system engages while the car is parked(presumably can get above 108F if parked in the sun)?
Thanks in advance.
Some baseline context:
Porsche recommends the car is parked in ambient below 86F.
The 400V apparently has a cooling system to keep it below 108F.
Need to maintain 30%(?) charge to avoid issues with restart?
...In much of the Southern US, the temp number of 86F isn't feasible in the summer...especially for me in AZ.
By now in Riyadh, I assume it is rather warm(as it is in AZ).
A few Qs for you:
Have you had a 400V battery temperature warning while you were driving OR parked the car after a drive?
If you park the car outside(or in a non-AC garage) the ambient is likely 90-100F at some times of the day...do you get any warnings?
Have you ever noticed if the battery cooling system engages while the car is parked(presumably can get above 108F if parked in the sun)?
Thanks in advance.
Apologies for delay, honestly i only tested the car with a climate like 38C parked and it was fully charged when started the car it was also maintaining the charge (almost full) however 5 minutes after driving it drops quickly to 50% but no issue no battery heating at all always the temp of the battery around 34C
answering your three questions as follow:
1- Never
2- Never however summer still not started in Saudi hence in July-Sep the heated months so I assume the real test in Summer (But honestly, I managed to get an air conditioning parking so I might not be able to do a real test unless i tried to park it outside)
3- Never
hope the above clear some of your concerns
P.S. similar warning of the 400V will be found in the Taycan owner manual and the Taycan is around since years in Saudi Arabia with no issue pertained to the 400V due to the hot climate
Last edited by Abdulrahman; May 20, 2025 at 02:33 PM.
Rennlist Member
Joined: Dec 2023
Posts: 101
Likes: 65
From: AZ
Thanks for the info!
The reference to the Taycan is interesting as well.
Although I believe it is similar, the Taycan 400V system is a little different scenario:
The Taycan 400V battery will have a much larger capacity(say 80-100kWhr), vs the 2kWHr battery in the 992.2GTS.
For a peak HP(pwr output) of say 500HP in the taycan, that is 375kW, and this would be <5X discharge rate of the 100kwhr battery capacity.
In the case of the 992.2GTS, if the peak electric HP is 50HP from the 2kWHr battery, that is ~38kW, which is ~20X of the 2kWhr battery capacity.
So power draw, as a multiple of the battery capacity, will be higher in the case of 992.2 GTS...it is a small, high discharge battery doing "burst" performance.
This doesn't necessarily make it worse, since if these special Varta cells are much lower internal resistance...they may not get *much* hotter/warmer at all.
Heat generated in the battery would be I^2 * R, where R is the internal resistance of the battery.
I checked weather in Riyadh...looks like past week has had some 100-105F days already.
If you haven't any issue while the car was parked outside(while doing errands etc), it seems like there isn't a reason to be concerned.
I will keep an eye out for this....but my GTS is still at Emden(sigh).
Thanks again for your feedback and keep us posted as you make further observations.
Cheers.
The reference to the Taycan is interesting as well.
Although I believe it is similar, the Taycan 400V system is a little different scenario:
The Taycan 400V battery will have a much larger capacity(say 80-100kWhr), vs the 2kWHr battery in the 992.2GTS.
For a peak HP(pwr output) of say 500HP in the taycan, that is 375kW, and this would be <5X discharge rate of the 100kwhr battery capacity.
In the case of the 992.2GTS, if the peak electric HP is 50HP from the 2kWHr battery, that is ~38kW, which is ~20X of the 2kWhr battery capacity.
So power draw, as a multiple of the battery capacity, will be higher in the case of 992.2 GTS...it is a small, high discharge battery doing "burst" performance.
This doesn't necessarily make it worse, since if these special Varta cells are much lower internal resistance...they may not get *much* hotter/warmer at all.
Heat generated in the battery would be I^2 * R, where R is the internal resistance of the battery.
I checked weather in Riyadh...looks like past week has had some 100-105F days already.
If you haven't any issue while the car was parked outside(while doing errands etc), it seems like there isn't a reason to be concerned.
I will keep an eye out for this....but my GTS is still at Emden(sigh).
Thanks again for your feedback and keep us posted as you make further observations.
Cheers.
Thread Starter
Instructor
Joined: Jul 2024
Posts: 119
Likes: 163
From: Riyadh, Saudi Arabia
Recent update on battery performance in hot weather.
I start parking my car in basement parking (2 levels underground) since the weather in Saudi Arabia, Riyadh start to hike to 45C and I drive the car once a week and I always park the car with 100% battery before I leave it for a week.
When I start the car after a week the battery 100% but immediately after driving it, it drops quickly to 45-49% (same behaviour for two weeks in a row) battery temp 34-38C.
Also, I notice in hot weather it took a bit longer to recharge to 100% (using S Plus mode) maybe 2-3 minutes more than usual in moderate-cold weather.
I start parking my car in basement parking (2 levels underground) since the weather in Saudi Arabia, Riyadh start to hike to 45C and I drive the car once a week and I always park the car with 100% battery before I leave it for a week.
When I start the car after a week the battery 100% but immediately after driving it, it drops quickly to 45-49% (same behaviour for two weeks in a row) battery temp 34-38C.
Also, I notice in hot weather it took a bit longer to recharge to 100% (using S Plus mode) maybe 2-3 minutes more than usual in moderate-cold weather.
Rennlist Member
Joined: Dec 2023
Posts: 101
Likes: 65
From: AZ
It's good to know that driving around in 45C weather(that's 113F), and seeing battery temps upto 38C(100F), it seems like the system is working well under tough conditions.
The slower re-charge time in hot conditions makes sense....the system is reducing charging amps to keep temps lower.
Thanks for the updates.
The slower re-charge time in hot conditions makes sense....the system is reducing charging amps to keep temps lower.
Thanks for the updates.
Rennlist Member
Joined: Apr 2013
Posts: 664
Likes: 238
From: Canada
Apparently, there was a large presentation by Porsche to CDN dealership sales peeps last week so that they had a chance to drive the car as well as be better informed about the new technology. Nice to hear that “the car is amazing, faster than a GT3RS and that the sound and torque is amazing”. Anyway, it’s been a 6 month wait and the car arrived at my dealership a little over a week ago and will be delivered next week once the tinting and PPF are completed. Although I’ve been asking my sales guy about storage challenges for a few months now, he just confirmed yesterday that the high voltage battery will need to be recharged at least every 2 months while in storage (“and more often if stored in cold temperatures”). My intent is to store the car in my insulated but unheated Canadian garage for the better part of 5 months over the winter. I was also told that if the battery fails and requires replacement, the approx $5,000. cost (plus labour to install?) would be my responsibility. Although it shouldn’t be a problem arranging for someone to start up the car and let it run for 5 minutes on a monthly basis while I’m enjoying being a snowbird. It seems crazy that Porsche has not come up with a better solution for colder winter climate countries.
I’m currently soul searching as far as proceeding with this car is concerned …
I’m currently soul searching as far as proceeding with this car is concerned …
Race Car
Joined: Aug 2020
Posts: 3,672
Likes: 2,365
Apparently, there was a large presentation by Porsche to CDN dealership sales peeps last week so that they had a chance to drive the car as well as be better informed about the new technology. Nice to hear that “the car is amazing, faster than a GT3RS and that the sound and torque is amazing”. Anyway, it’s been a 6 month wait and the car arrived at my dealership a little over a week ago and will be delivered next week once the tinting and PPF are completed. Although I’ve been asking my sales guy about storage challenges for a few months now, he just confirmed yesterday that the high voltage battery will need to be recharged at least every 2 months while in storage (“and more often if stored in cold temperatures”). My intent is to store the car in my insulated but unheated Canadian garage for the better part of 5 months over the winter. I was also told that if the battery fails and requires replacement, the approx $5,000. cost (plus labour to install?) would be my responsibility. Although it shouldn’t be a problem arranging for someone to start up the car and let it run for 5 minutes on a monthly basis while I’m enjoying being a snowbird. It seems crazy that Porsche has not come up with a better solution for colder winter climate countries.
I’m currently soul searching as far as proceeding with this car is concerned …
I’m currently soul searching as far as proceeding with this car is concerned …
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Rennlist Member
Joined: Apr 2013
Posts: 664
Likes: 238
From: Canada
Race Car
Joined: Aug 2020
Posts: 3,672
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I was told that merely starting it and letting it run for 5 minutes while putting it in sport plus is all that’s required to charge up the battery. Since I’ll be over 1,500 miles away while it’s freezing cold with winter driving conditions, driving the car is not going to happen.
Racer
Joined: Sep 2018
Posts: 326
Likes: 114
From: Toronto
Apparently, there was a large presentation by Porsche to CDN dealership sales peeps last week so that they had a chance to drive the car as well as be better informed about the new technology. Nice to hear that “the car is amazing, faster than a GT3RS and that the sound and torque is amazing”. Anyway, it’s been a 6 month wait and the car arrived at my dealership a little over a week ago and will be delivered next week once the tinting and PPF are completed. Although I’ve been asking my sales guy about storage challenges for a few months now, he just confirmed yesterday that the high voltage battery will need to be recharged at least every 2 months while in storage (“and more often if stored in cold temperatures”). My intent is to store the car in my insulated but unheated Canadian garage for the better part of 5 months over the winter. I was also told that if the battery fails and requires replacement, the approx $5,000. cost (plus labour to install?) would be my responsibility. Although it shouldn’t be a problem arranging for someone to start up the car and let it run for 5 minutes on a monthly basis while I’m enjoying being a snowbird. It seems crazy that Porsche has not come up with a better solution for colder winter climate countries.
I’m currently soul searching as far as proceeding with this car is concerned …
I’m currently soul searching as far as proceeding with this car is concerned …
Rennlist Member
Joined: Oct 2015
Posts: 1,170
Likes: 734
From: PA
Why not take the car to the warmer climate. I am glad I am daily driving mine and not dealing with these issues anymore. If I had a car that required storage I would probably stay away from the GTS.
Rennlist Member
Joined: Oct 2017
Posts: 212
Likes: 130
From: Upstate New York
Apparently, there was a large presentation by Porsche to CDN dealership sales peeps last week so that they had a chance to drive the car as well as be better informed about the new technology. Nice to hear that “the car is amazing, faster than a GT3RS and that the sound and torque is amazing”. Anyway, it’s been a 6 month wait and the car arrived at my dealership a little over a week ago and will be delivered next week once the tinting and PPF are completed. Although I’ve been asking my sales guy about storage challenges for a few months now, he just confirmed yesterday that the high voltage battery will need to be recharged at least every 2 months while in storage (“and more often if stored in cold temperatures”). My intent is to store the car in my insulated but unheated Canadian garage for the better part of 5 months over the winter. I was also told that if the battery fails and requires replacement, the approx $5,000. cost (plus labour to install?) would be my responsibility. Although it shouldn’t be a problem arranging for someone to start up the car and let it run for 5 minutes on a monthly basis while I’m enjoying being a snowbird. It seems crazy that Porsche has not come up with a better solution for colder winter climate countries.
I’m currently soul searching as far as proceeding with this car is concerned …
I’m currently soul searching as far as proceeding with this car is concerned …
Rennlist Member
Joined: Aug 2012
Posts: 8,279
Likes: 2,699
From: Pac NW
All batteries undergo self-discharge, no exceptions. Using a battery in a passenger car that can't be charged offline is just $#!++y engineering.
Last edited by Larson E. Rapp; May 27, 2025 at 12:22 PM.
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Joined: Dec 2023
Posts: 101
Likes: 65
From: AZ
I have a GTS on order and is being built now. I sent the above to my SA and GM. The SA got back to me. To show you how little these guys know about the car, he told me that Porsche had a charger I could buy. I asked which battery that would hook up to and he said the 12V which would keep the 400V from discharging! I cannot believe this.