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ID.4 Pro S AWD
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I didn't hear them giving anyone a remaining AH rating for the pack in their specific car - It sounds like they're just entering your car into a database and calculating the average degradation for similar cars in your geographic area and assuming your car is 'average', you're Fair, Good or Excellent - I don't see where it purports to tell you the exact health of the battery in your specific car . . . . or, am I missing something there?

Don
They did say it links via an app for the ID.4 vs reading numbers off the dash at 100%. Didn't go into many details. It was an ad after all. AT least its free to try.
 

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2021 VW iD4 1st Edition Glacier White
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158 Posts
10% in just 14,000 miles is a bit more than I would have expected, based on my long term experience with my 2012 Mitsu, but it does show that degradation begins early and highlights the importance of taking good care of your battery if you expect to own your ID.4 for the long term

Don
I think based on actual calculated capacity it was 7.5%. The car took 9.5% less electricity to charge from 0-100% but that could be due to other factors. It is still too much for that size battery, my Honda Clarity degraded about 6% after 2 years and 18000 miles and that battery was fully cycled every other day.
 

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iD4 Pro Performance Max - Ordered July 2021 - Delivery December 2021 (hopefully)
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13 Posts
VW's "100% charge" is only charging the 82Kw battery pack to 77Kw - The 5Kw 'reserve' is actually what you get when you stop charging all 82Kw of cells at a tenth of a volt or so short of max. All EV manufacturers do a similar thing. Charging any lithium pack to it's max voltage would reduce it's life significantly

Tesla holds back even more of their packs, but they do allow some cars to charge farther into the reserve during emergencies like hurricanes or forest fires to make sure owners have enough juice to evacuate safely. Once the emergency passes, they restrict charging back to their normal reserve

Don
My understanding is that Tesla holds a much smaller proportion of the battery “in reserve” compared with other EV manufacturers. Early EVs and PHEVs used all of the battery, holding little or none in reserve, suffering battery deg as a result.
 

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I was told by my chemistry engineering friend (who understands lithium batteries better than me) that the simplest way is to try and keep the battery between 20-80% SOC most (>80%) of the time. When needed, you can charge to 100%, and let it get below 20% when needed, but by keeping it between 20-80% most of the time, the lithium ions will have a long & happy life, as they love being around 50% most of the time, but (paradoxically) the lithium ions also become healthier when charged to 100% every few cycles (how many cycles the battery likes this 100% charge is debated by lithium battery nerds - but if you’re not using the car very much, charging the battery to 100% once every 2-6 months might be good). Just don’t leave the battery fully charged at 100% for an extended period of time. If you’re going out of town, and not using the car for a while, leave it around 50% SOC.

Also, as others have mentioned, try to charge with level 2 most of the time, but by all means, enjoy DC fast charging when needed.

Apparently, satellites that operate on lithium batteries and are charged by solar power, are programmed to always be between 40-60% SOC. This ensures a very long (+100 year) life. But its too impractical to always keep an EV in that narrow range. Just enjoy the vehicle by keeping it between 20-80% SOC, >80% of the time. This way, the battery should last at least 15 years, without much degrading (battery holding 80% of original range). By that time, there will be affordable ways to recycle/upgrade to newer/better batteries.
But charging at L2 u do usually at home so u have to pay. EA fast charging is free for 3 years. That is about a $5k savings for me in CA with pg&e
 

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On order ID4 Pro AWD
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But charging at L2 u do usually at home so u have to pay. EA fast charging is free for 3 years. That is about a $5k savings for me in CA with pg&e
$5K is a lot for electricity cost over 3 years. What are you paying in CA per kw? How much are you driving monthly or yearly? If $5K is accurate, and I lived near an EA charger, I would charge for free, too.

I would be interested to see some stats about battery degradation over time on charging via DC fast chargers exclusively vs Level 2 exclusively.
 

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iD4 Pro Performance Max - Ordered July 2021 - Delivery December 2021 (hopefully)
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But charging at L2 u do usually at home so u have to pay. EA fast charging is free for 3 years. That is about a $5k savings for me in CA with pg&e
$5k is huge. What do you pay per kWh? How many miles do you intend to do?

I live in the UK and pay 5p (about 7 cents) per kWh off-peak.
 

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VW ID.4 Pro Glacier White Metallic
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87 Posts
California off peak rate is probably somewhere around $0.20 from PG&E...

Assuming one drives 15K miles each year at 3mi/kwh, that's roughly $3K for 3 years for simple math.

If you're basing the 15K miles on DCFC rates, it'll be $0.31 + $4/mo access fee (for EA) equates to roughly $1,600/yr on DCFC or almost $5K over 3 years
 

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On order ID4 Pro AWD
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Thanks for clarifying rates in CA & DCFC rates @ EA.

As someone posted earlier, this reviewer in Europe drove his iD3 14,000 miles (22,500km) and charged mostly on DCFC. After 1 year, according to his experiment, his range dropped about 7-8%.

If you're planning on mostly charging at DCFC, it might be a good idea to consider leasing for 2-3 years, rather than owning the vehicle long term.
 

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Thanks for clarifying rates in CA & DCFC rates @ EA.

As someone posted earlier, this reviewer in Europe drove his iD3 14,000 miles (22,500km) and charged mostly on DCFC. After 1 year, according to his experiment, his range dropped about 7-8%.

If you're planning on mostly charging at DCFC, it might be a good idea to consider leasing for 2-3 years, rather than owning the vehicle long term.
I wish I could remember where I saw it, but there was some type of "study" done on Teslas where they showed that the battery would lose up to 10% the first year of ownership (with the normal variation depending on how the owner used/charged the car). However, after the first year's degradation, they found there was very little further degradation (maybe 1 or 2%) over the next several years.
 

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2021 ID.4 1st Blue - del. 3/16/21
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348 Posts
Has anyone with VCDS (or another scan tool that can read this value, like ODIS) checked this in 19-CAN Gateway?

March 17th with 42 miles:
IDE09074-MAS08256 Vehicle properties-Max energy content 79350 Wh

Sept 17th with 4434 miles:
IDE09074-MAS08256 Vehicle properties-Max energy content 77800 Wh

Is it plausible that my battery has degraded almost 2% over 4400 miles? Some other datapoints:

Mar 17, 2021 79350
Jun 11, 2021 78900
Aug 3, 2021 77900
Aug 17, 2021 77950
Sept 17, 2021 77800
 

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Numbers puzzle me a bit, as they are well above the allowed 77KW and far below the 82KW gross
figure.
 

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2021 VW iD4 1st Edition Glacier White
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158 Posts
Has anyone with VCDS (or another scan tool that can read this value, like ODIS) checked this in 19-CAN Gateway?

March 17th with 42 miles:
IDE09074-MAS08256 Vehicle properties-Max energy content 79350 Wh

Sept 17th with 4434 miles:
IDE09074-MAS08256 Vehicle properties-Max energy content 77800 Wh

Is it plausible that my battery has degraded almost 2% over 4400 miles? Some other datapoints:

Mar 17, 2021 79350
Jun 11, 2021 78900
Aug 3, 2021 77900
Aug 17, 2021 77950
Sept 17, 2021 77800
Yes, 2% in 4400 mile is perfectly normal. The 77kWh is the nominal usable capacity. The battery has more capacity as your numbers show. It is the same with my i3 (car shows more capacity than BMW specs even after 2 years).
 

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ID.4 1st Edition White / Lunar Grey
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@Andy at Ross-Tech.com how often do you charge to 100%? I'm curious if this number will rise after doing so?

BTW with my i3, if I charge to 100% (rarely do), I can drive a much greater distance before the percentage tics down to 99.5%, than I can in any subsequent 1/2% increment. I suspect the battery charges to about 102%.
 

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2021 ID.4 1st Blue - del. 3/16/21
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348 Posts
@Andy at Ross-Tech.com how often do you charge to 100%? I'm curious if this number will rise after doing so?

BTW with my i3, if I charge to 100% (rarely do), I can drive a much greater distance before the percentage tics down to 99.5%, than I can in any subsequent 1/2% increment. I suspect the battery charges to about 102%.
The only time I have charged to 100% was for road trips and I have only DCFC'ed to 100% once. Most of the time I am charging using Level 1 to 80%.
 

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VW ID.4 Pro Glacier White Metallic
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I'll be curious to find out what my degradation is on my ID.4 Pro with 3,500 miles... Been using DCFC 99% of the time; probably charge up to around 95% occasionally before a trip. Too bad I don't think EVNotify can read it or my OBD adapter (Veepeak)...
 

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626 Posts
Has anyone with VCDS (or another scan tool that can read this value, like ODIS) checked this in 19-CAN Gateway?

March 17th with 42 miles:
IDE09074-MAS08256 Vehicle properties-Max energy content 79350 Wh

Sept 17th with 4434 miles:
IDE09074-MAS08256 Vehicle properties-Max energy content 77800 Wh

Is it plausible that my battery has degraded almost 2% over 4400 miles? Some other datapoints:

Mar 17, 2021 79350
Jun 11, 2021 78900
Aug 3, 2021 77900
Aug 17, 2021 77950
Sept 17, 2021 77800
Temperature and drift BMS mode will affect this number.
Try to do 2 full charge on L1 or L2 before obtaining this values.
And try to be within 10°F between each measurement.
 

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$5K is a lot for electricity cost over 3 years. What are you paying in CA per kw? How much are you driving monthly or yearly? If $5K is accurate, and I lived near an EA charger, I would charge for free, too.

I would be interested to see some stats about battery degradation over time on charging via DC fast chargers exclusively vs Level 2 exclusively.
I use EA exclusively. Charge at battery low warning to 80%. I'm at 7580 miles today. Will or can I get a degradation report at my 10k mile checkup?
Inquiring minds want to know 😉?
 

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ID.4 Pro S AWD
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169 Posts
I use EA exclusively. Charge at battery low warning to 80%.
Routinely taking a battery to low battery warning isn't good for the battery. Its worse than charging to 100%.
 
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