Preheating when charger plugged in Question

[torx]

I have a timer set so the car preheats in the morning. On most mornings the charger is plugged in. So to preheat the car uses power from the plugged in charger rather than the battery. Is it possible to set it so it does not use power from the charger in this scenario?

Also how do I use the instant preheat function. When I select 'start' under the climate control section in the app it starts as a 1 hour countdown.

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[W1NGE]

I have a timer set so the car preheats in the morning. On most mornings the charger is plugged in. So to preheat the car uses power from the plugged in charger rather than the battery. Is it possible to set it so it does not use power from the charger in this scenario?

Also how do I use the instant preheat function. When I select 'start' under the climate control section in the app it starts as a 1 hour countdown.

Instant preheat has no configuration - 60 mins is pre-defined and I guess based on how long it typically takes to reach a set temperature. Not sure if cancels when up to temp and therefore could take less time.

Setting the pre-heat on door unlock will initiate a 5 min session (in my experience).

Not sure actually on the other query - wall box / EVSE dependent potentially and I don't think either of the Porsche units provide this level of control.

 

[TAYC4S]

Instant preheat has no configuration - 60 mins is pre-defined and I guess based on how long it typically takes to reach a set temperature. Not sure if cancels when up to temp and therefore could take less time.

Setting the pre-heat on door unlock will initiate a 5 min session (in my experience).

Not sure actually on the other query - wall box / EVSE dependent potentially and I don't think either of the Porsche units provide this level of control.

I agree on the points already raised. I do not think you can select pre-heat to only come via the main battery if plugged in to the wall charger. I think the idea is the opposite, ie the car determines that you have a selected SOC which should be available to you when you want to drive. If you then want pre-heat its logical in the cars mind to take that from the charger rather than deplete the battery. The upside benefit if then driving is that your main battery is also slightly warm (better efficiency) and the cabin requires less energy to reach your preferred ambient temp.

A long answer to say I don't think its possible to select where the energy source for pre-heating is taken from.

 

[BigBob]

The need to preheating the battery was something i'd never even considered (Total EV virgin). I hope the ability to do this comes as standard, or is it hidden in some spec i hadn't noticed?
Thanks and apologies for the stupid question.

 

[Bobby]

Supplementary query - how to I cancel preheating. I dont want it on? Thanks

 

[Fish Fingers]

I have a timer set so the car preheats in the morning. On most mornings the charger is plugged in. So to preheat the car uses power from the plugged in charger rather than the battery. Is it possible to set it so it does not use power from the charger in this scenario?

Also how do I use the instant preheat function. When I select 'start' under the climate control section in the app it starts as a 1 hour countdown.

Just to clarify.
The one hour timer is not a 'countdown' it is a 'time remaining'.

When you see this the precool/heat has already started and shuts off in an hour.

 

[Doc B]

I have a timer set so the car preheats in the morning. On most mornings the charger is plugged in. So to preheat the car uses power from the plugged in charger rather than the battery. Is it possible to set it so it does not use power from the charger in this scenario?

Also how do I use the instant preheat function. When I select 'start' under the climate control section in the app it starts as a 1 hour countdown.

Yeah, the timer functions on the car are totally unintuitive. So, if you want it to pre-heat in the morning but not charge the battery, set the battery target on the timer to less than the actual charge in the battery, and set a profile as well that means that the car won't charge to more than that level. The car never actually uses the mains to pre-heat - it always heats the cabin using power from the battery - i.e. the mains will top-up the battery while the car is heating the cabin. For example, I have set my profile to 85% with a timer target of 85% with pre-warm - the car will charge to 87% then take no further power from the mains, and use the 2% buffer to heat the cabin once the charging stops.

The one hour countdown is a countdown until the preheat turns OFF. So it has started pre-heating, but pre-heating in those circumstances (i.e. without a timer set) will only heat for an hour unless you re-start it again (to stop you accidentally running out of juice if you forget to turn the pre-heat off.

 

[torx]

Yeah, the timer functions on the car are totally unintuitive. So, if you want it to pre-heat in the morning but not charge the battery, set the battery target on the timer to less than the actual charge in the battery, and set a profile as well that means that the car won't charge to more than that level. The car never actually uses the mains to pre-heat - it always heats the cabin using power from the battery - i.e. the mains will top-up the battery while the car is heating the cabin. For example, I have set my profile to 85% with a timer target of 85% with pre-warm - the car will charge to 87% then take no further power from the mains, and use the 2% buffer to heat the cabin once the charging stops.

The one hour countdown is a countdown until the preheat turns OFF. So it has started pre-heating, but pre-heating in those circumstances (i.e. without a timer set) will only heat for an hour unless you re-start it again (to stop you accidentally running out of juice if you forget to turn the pre-heat off.

Thanks, will give that a go and see what happens tomorrow.

 

[Nipri]

In the I Pace you can pre heat the car in whatever time increments which suits you including instantly. I preferred a lot more to the Taycan preheating. Perfect example would have been last night walking to the car after late night game in Birmingham. Previously would preheat I Pace 5 minutes before & car would be nice & warm.

 

[JimBob]

Is there a reason why you would want to do this? Preheating the battery and cabin from the mains is more efficient and cost effective than using the battery to do this. If you don't plug the car in and run the timers and profiles, it will use around 2%-3% of the battery SOC to condition the car.

 

[torx]

Is there a reason why you would want to do this? Preheating the battery and cabin from the mains is more efficient and cost effective than using the battery to do this. If you don't plug the car in and run the timers and profiles, it will use around 2%-3% of the battery SOC to condition the car.

Save electricity costs. I charge between 0030-0430 at 5p KWH. At 0830 when I get in the car to drive it is 14p KWH, so with an activated charger it is costing me more at that time of day.

I only do about 20 miles a day so range is no issue.

 

[Fish Fingers]

The need to preheating the battery was something i'd never even considered (Total EV virgin). I hope the ability to do this comes as standard, or is it hidden in some spec i hadn't noticed?
Thanks and apologies for the stupid question.

Standard..... And really useful on frosty mornings.

 

[Fish Fingers]

Supplementary query - how to I cancel preheating. I dont want it on? Thanks

If it's related to a Timer, go into the Timer option and toggle off at the bottom.

 

[W1NGE]

The need to preheating the battery was something i'd never even considered (Total EV virgin). I hope the ability to do this comes as standard, or is it hidden in some spec i hadn't noticed?
Thanks and apologies for the stupid question.

Absolutely not a stupid question or anything close.

To pre-heat / pre-cool actually refers primarily to the cabin temperature. The process of doing this uses energy and when not charging uses the car's battery which naturally warms up when in use. There isn't a specific option / configuration for 'battery pre-heat'.

Battery pre-heat / conditioning can also occur when using NAV in conjunction with PIRM (Porsche Intelligent Range Manager & Porsche Charging Planner - std in UK car) and / or you add a stopover at a recognised charging point. If the car 'knows' the destination then pre-conditioning will automatically occur in an attempt to get the battery up to the optimal temperature for the state of charge (SOC) at the charging location to optimise the charging process (warmer batteries charge quicker than cold ones). This feature works for DC charger >= 50kW.

Example would be to go on a tour which may require you to charge en route to ensure you have a minimum charge at your final destination. NAV will plot the route and indicate your automatically selected charge points (limitation being the database of charge points Porsche currently has - does not cover all available), advise how long you need to charge for and pre-heat / condition the battery in readiness for that volt and bolt stopover. You can go further and add your own stopovers which are charging locations.

Suggest playing around with either the app or PCM or My Porsche and dream up a route to see visually what is possible. Imperative also to read the NAV / PIRM / PCP sections in the Porsche Good to Know App for more detail and clarity.

Alternative is to drive like a madman and warm up the battery that way!

 

[JimBob]

Save electricity costs. I charge between 0030-0430 at 5p KWH. At 0830 when I get in the car to drive it is 14p KWH, so with an activated charger it is costing me more at that time of day.

I only do about 20 miles a day so range is no issue.

Save electricity costs. I charge between 0030-0430 at 5p KWH. At 0830 when I get in the car to drive it is 14p KWH, so with an activated charger it is costing me more at that time of day.

I only do about 20 miles a day so range is no issue.

Ok, so you want charge the battery when the cost of electricity is low but precondition the cabin when the cost of electricity may be high?

Given your mileage, the simple way is charge once a week during times when electricity is cheap. Then unplug the rest of the week and use the cheap stored electricity to condition the cabin.

As to costs, assume you lose 20% on charging so your actual cost to charge is 5p * 20% which is still cheaper than your 14p.

Bob's your uncle.

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