Battery Degradation

[J0EL]

I was wondering if anyone knows the difference in battery degradation at different amperage

15 amp 120v 1.44kw
24 amp 5.7kw
32 amp 7.2kw
40 amp 9.6kw
48 amp 11.5kw
75 amp 18kw
80 amp 19.2kw
150kw DC supercharging
270kw DC supercharging

Unfortunately, I'm stuck at either 120v 1.44 kw or 24 amps with a 50 ft. extension (50amp) cord for a couple months. My dealer recommends I fast charge instead.
Saying the low charging degrades the battery faster. Can anyone confirm this?

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[XLR82XS]

Long story short: keeping the battery between 20-80% SOC is most likely the best bet. Constant 0-100% is not good for longevity. Also, keeping it at 100% SOC and not driven for weeks is not ideal.

 

[JimBob]

Your advice is wrong. AC chargers, are gentler on the battery. 150kw not much effect. 270kw more effect. Porsche on the recent update allows you to limit the current to 200kw to preserve the battery.

The actions which have the most detrimental effects on battery health are time, heat, number of charging cycles.

 

[J0EL]

You are absolutely correct but you misunderstood me.
Im talking about the speed you charge your car.
what would the lifespan of your battery be at different charging speeds.
Supposedly, you would have 80% battery lifespan after 10,000 charges.
(300 charges per year for 10 years)
Is that the same if you only supercharge, compared to someone who charges at 80amps, compared to someone who charges at 120v 1.44kw

 

[JimBob]

The battery will have better life using the low powered chargers.

 

[J0EL]

I agree with you James. Dealer says otherwise. They said that the car is searching for more juice and that causes more degradation to the battery. Is there any way to confirm this? Lithium batteries are different than your regular slow charging ICE car batteries. This is the only reason Im sort of giving him the benefit of the doubt and asking around. I asked a friend who knows an electrical engineer who specifically works with lithium batteries but I have not gotten a response yet.

Joel

 

[Rainforest]

BTW, how is the battery health of long time Taycan owners? Is the battery as resistant to degradation as Tesla batteries are?

 

[JimBob]

I agree with you James. Dealer says otherwise. They said that the car is searching for more juice and that causes more degradation to the battery. Is there any way to confirm this? Lithium batteries are different than your regular slow charging ICE car batteries. This is the only reason Im sort of giving him the benefit of the doubt and asking around. I asked a friend who knows an electrical engineer who specifically works with lithium batteries but I have not gotten a response yet.

Joel

Make sure the high voltage battery is not being confused with the 12v battery.

 

[JimBob]

BTW, how is the battery health of long time Taycan owners? Is the battery as resistant to degradation as Tesla batteries are?

There isn't a history for the Taycan yet. However there is a history for Tesla, Chevy bolt and the Nissan Leaf. Number of Youtube posts on this. The Tesla and Chevy Bolt have held up well. The Nissan Leaf has not. The Tesla and Bolt have active cooling, the Leaf does not. The Taycan has active cooling. Heat kills batteries.

 

[Mike in CA]

BTW, how is the battery health of long time Taycan owners? Is the battery as resistant to degradation as Tesla batteries are?

Spoken like a proud Tesla owner! ?

However, since the Taycan has been on sale for less than a year and a half your reference to "long time Taycan owners" is a bit of an oxymoron.

Nevertheless, the Porsche's batteries will certainly prove superior to those from Tesla!

 

[Neptune]

I agree with you James. Dealer says otherwise. They said that the car is searching for more juice and that causes more degradation to the battery. Is there any way to confirm this? Lithium batteries are different than your regular slow charging ICE car batteries. This is the only reason Im sort of giving him the benefit of the doubt and asking around. I asked a friend who knows an electrical engineer who specifically works with lithium batteries but I have not gotten a response yet.

Joel

Your dealer has no idea what he is talking about.
Some times I think dealers just like to make stuff up.

 

[Taycanturbolondon]

99% of the time I charge on a 3pin 3.6kw charger…… my battery should last forever.

 

[JimBob]

99% of the time I charge on a 3pin 3.6kw charger…… my battery should last forever.

Along with the time spent charging.

 

[Rainforest]

Spoken like a proud Tesla owner! ?

However, since the Taycan has been on sale for less than a year and a half your reference to "long time Taycan owners" is a bit of an oxymoron.

Nevertheless, the Porsche's batteries will certainly prove superior to those from Tesla!

OK I gave it away. Yes I'm a two Tesla owner. But I do have a Taycan on order!

 

[NC_Taycan]

After almost 8 years and 100K miles of Model S P85 ownership, charging at home (9 kW) to 85% almost every day, and probably < 30 SuperCharger sessions and probably < 30 100% charges, my 100% SOC range had declined from 265 miles (new) to 245 miles (according to the computer).

I'll venture an engineer's opinion and say that below 100 kW, the rate of charge is irrelevant to battery life / degredation. What will matter is SOC (keeping the battery below 85%). When you need 100%, charge to 100% just before leaving to minimize the duration the SOC is above 85%.

I'll go one step further and say that within a window of 20% - 85% the depth of charge when charging at <= 100 kW is also irrelevant (meaning no preference for discharging to 20% before charging vs. charging at 50%). So don't worry about this and do whatever is most convenient for your usage.

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