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Slow charging this morning at public charger?

kashmachine

Member
Aug 2, 2021
18
6
UK
Hi, so I have a Model 3 SR+ and am about 3/4 weeks in with it. I've been relying on public chargers as I live in a flat. These tend to be the BP Pulse 50kW rapid chargers. Usually I've managed to charge to around 80% quite comfortably within 30-50mins.

However this morning when driving the 1/2 miles to a charger, the charge rate was only about 7kW at around 10miles/hr. The temperature was 12 degrees. I just wanted to check if this is because of a cold battery? Would it make sense to drive for a bit longer before heading to a charger? Just conscious of the upcoming colder winter months and the most efficient way to charge effectively

Thanks
 

Alan J

Member
Jun 17, 2019
283
183
Glasgow
Hi, so I have a Model 3 SR+ and am about 3/4 weeks in with it. I've been relying on public chargers as I live in a flat. These tend to be the BP Pulse 50kW rapid chargers. Usually I've managed to charge to around 80% quite comfortably within 30-50mins.

However this morning when driving the 1/2 miles to a charger, the charge rate was only about 7kW at around 10miles/hr. The temperature was 12 degrees. I just wanted to check if this is because of a cold battery? Would it make sense to drive for a bit longer before heading to a charger? Just conscious of the upcoming colder winter months and the most efficient way to charge effectively

Thanks
I've relied on Public Charging for just over 2 years I find that the best time to Charge is following a journey when the Battery is warm, this will be increasingly so as the weather gets colder, you just need to alter your habits a little but it can work for you.
 
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btc1k

Member
Jan 18, 2021
516
387
Bristol
Hi, so I have a Model 3 SR+ and am about 3/4 weeks in with it. I've been relying on public chargers as I live in a flat. These tend to be the BP Pulse 50kW rapid chargers. Usually I've managed to charge to around 80% quite comfortably within 30-50mins.

However this morning when driving the 1/2 miles to a charger, the charge rate was only about 7kW at around 10miles/hr. The temperature was 12 degrees. I just wanted to check if this is because of a cold battery? Would it make sense to drive for a bit longer before heading to a charger? Just conscious of the upcoming colder winter months and the most efficient way to charge effectively

Thanks
7kW will give more than 10mi/hr, more like 30mi/hr.
 
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Alistairuk

Member
Jun 25, 2020
568
382
Scotland
Hi, so I have a Model 3 SR+ and am about 3/4 weeks in with it. I've been relying on public chargers as I live in a flat. These tend to be the BP Pulse 50kW rapid chargers. Usually I've managed to charge to around 80% quite comfortably within 30-50mins.

However this morning when driving the 1/2 miles to a charger, the charge rate was only about 7kW at around 10miles/hr. The temperature was 12 degrees. I just wanted to check if this is because of a cold battery? Would it make sense to drive for a bit longer before heading to a charger? Just conscious of the upcoming colder winter months and the most efficient way to charge effectively

Thanks
Yes your battery will be cold - it’s better after a long drive when the battery is warm although if it’s below freezing you may struggle even with a long drive.
 
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init6

Member
Oct 16, 2020
772
458
Scotland
Before setting off, set your destination to the nearest supercharger. The car should start to pre-condition the battery for charging. Depending on the distance to your public charger, it may heat up the battery before you get to the charger.
 
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Js1977

Member
Aug 13, 2020
400
192
Dorset
Before setting off, set your destination to the nearest supercharger. The car should start to pre-condition the battery for charging. Depending on the distance to your public charger, it may heat up the battery before you get to the charger.
Lets not jump the gun. Lets start by asking what the SOC was when he started charging. Unless the OP is on the same wave length of fossil fuel panic buyers at the moment, there is either something wrong with the car or the charger.
 
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init6

Member
Oct 16, 2020
772
458
Scotland
Lets not jump the gun. Lets start by asking what the SOC was when he started charging. Unless the OP is on the same wave length of fossil fuel panic buyers at the moment, there is either something wrong with the car or the charger.
It's not jumping the gun to pre-condition. Pre-conditioning is worthwhile regardless of the SOC of the car or the state of the charger.
 
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GeorgeSymonds

Active Member
Mar 16, 2018
1,459
1,072
UK
7kw sounds more like AC charging and not rapid charging, may sound daft but could you have been on a different type of charger?

7kw translates to about 30 miles per hour on a M3 but if the car needs power for anything else that gets deducted. If you turn up in a cold car with the cabin heaters on full and working hard then of the 7kw only maybe 2-3 kw will reach the battery hence the lower miles per hour added. Winter and colder temperatures are in their way, we’re going to see a lot more posts like this.

The LFP battery was also reported as not liking the cold and maybe that’s still the same which means it’s charging performance is down on expectations until it’s warmed itself up.
 
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Alistairuk

Member
Jun 25, 2020
568
382
Scotland
Lets not jump the gun. Lets start by asking what the SOC was when he started charging. Unless the OP is on the same wave length of fossil fuel panic buyers at the moment, there is either something wrong with the car or the charger.
Not necessarily - I arrived at Eurotunnel Folkestone with 15% charge after a 6 min drive (with pre-conditioning on) from the hotel at 5am on Wednesday morning (temp was 7 degrees) and only managed 20kw/h max over the 30 mins from the damn charger - ended up having to charge in Calais where it never went above 70!
 
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Nick77

Deep Blue Model 3 LR (2021 MIC)
Mar 15, 2020
518
213
Burton-on-Trent
I've not yet gone through a winter on public chargers. My thoughts though is to pick the warmest time of day (mid-late afternoon) and go for a short drive beforehand to get a bit of preconditioning in. Maybe precondition the car from the app for 10 mins before you set out too.
 
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kashmachine

Member
Aug 2, 2021
18
6
UK
I've not yet gone through a winter on public chargers. My thoughts though is to pick the warmest time of day (mid-late afternoon) and go for a short drive beforehand to get a bit of preconditioning in. Maybe precondition the car from the app for 10 mins before you set out too.
I think this is basically the best tip, let the sun hit the car then give it a drive for a bit. Crazy how much difference it makes between days, might have to start checking the weather before I go charge!
 
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Alistairuk

Member
Jun 25, 2020
568
382
Scotland
I think this is basically the best tip, let the sun hit the car then give it a drive for a bit. Crazy how much difference it makes between days, might have to start checking the weather before I go charge!
If you can find one that's near a place you can pop for a coffee or go a walk - it'll be ideal during winter and you won't be bothered about the longer charging time - just keep an eye on how fast its charging from the app and pop back to the car as it finishes :)
 
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kashmachine

Member
Aug 2, 2021
18
6
UK
If you can find one that's near a place you can pop for a coffee or go a walk - it'll be ideal during winter and you won't be bothered about the longer charging time - just keep an eye on how fast its charging from the app and pop back to the car as it finishes :)
Yeah certainly some behavioural changes switching to an EV. There's a wonderful BP Pulse situated next to a lake I live by. Perfect to park up, go for a 35-45min walk then come back to a charged car!
 
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