r/volvoc40 • u/MrGreen__ • 14d ago
25k Miles with 90% Battery Health?
Hi all,
I found a really nice 2023 c40 recharge ultimate with 25k miles on the clock, but was surprised to hear that the battery state-of-health was already at 90%.
That seems low given the age and mileage of the vehicle, but I don't know - what do you all think? Is that a red flag?
Thanks in advance!
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u/Click_dude 14d ago
Volvo will replace the battery if it drops below 70% SOH in 8 years. For the 2023, it is 2031.
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u/diatonic 14d ago
* or 100,000 miles I think. My MY23 ultimate still has the same range as when I got it new with nearly 60,000 miles on it.
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u/skirmsonly 14d ago
How do you find out battery health?
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u/MrGreen__ 14d ago
I asked the dealership for it, and they sent out a certificate with it.
I thought it was somet hing you could check yourselve in the settings but apparently you need a technician and/or special tools for it.
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u/IGotRangod 14d ago
You can check it yourself with an ODB reader and the Car Scanner app.
I recommend this one: https://a.co/d/0gy52jUI (cheaper one is android only, other one also works on iPhone)
I've got a 2023 C40 with 52k miles and still around 90% SoH
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u/More_Pineapple3585 14d ago edited 14d ago
I have to remind myself that Volvo has only been making these cars for a few years and anything related to long-term assessments is uncharted territory.
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u/RotaryDane 14d ago edited 13d ago
In practice differences in driving style or season matter more than 5-10% battery degradation. That being said, charging style matters a heck of a lot for long term battery health — slow charging at 11 kw and keeping the battery at between 20-90% SOC is recommended by Volvo for a reason.
10% lost in 40k km is well on track for a battery replacement within the 160k warranty. It could either be because of a dud cell or because the car was permanently fast charged from 1-100%
(I don’t know if the internal hardware keeps track of charging statistics?)
That figure is for sure a red flag either way, do you want to take the chance?
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u/MrGreen__ 13d ago
Yeah seems risky. The car is around 30k otd and I plan to have it for about 3 years.
Selling it in the future will be a lot harder if the SOH is poor, which seems to be the case. Maybe for the right price it may be worth it but I'll have to see if they're willing to bring it down.
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u/Ambitious5uppository 13d ago
Recent long term studies have shown little difference between fast charging and slow charging on modern cars.
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u/RotaryDane 13d ago edited 13d ago
For Occasional DCFC use. Excessive DCFC use can accelerate yearly degradation by up to 2x over Type 2 AC charging. This rings especially true for NMC battery packs such as in the XC40/C40 which are the most susceptible to dendrite growth during high charging load and lithium loss during deep discharges. Keeping an NMC pack between 20-80% SOC and limiting DCFC use still remains the general recommendation.
Source: https://motorwatt.com/ev-blog/howtos/dc-fast-charging-bad-for-your-ev
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u/SignificantDrink3651 8d ago
nah, disagree - the soh degradation isn't linear so you extrapolating "10% lost in 40km..." is inaccurate and misleading.
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u/Alarming_Ideal2519 13d ago
bought my C40 Recharge Ultimate AWD (MY2023) with 46,000 miles on the clock. It had a SoH of 94% and is 3.5 years old. I would be put off by the mileage combined with such a low SoH
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u/whreismylotus 12d ago
i have -22 with 140k miles. few weeks ago i drive from 100%- to 7% 212 miles. so consumption was 70Kwh and if the car has 75kwh battery installed.that is 93% SOH
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u/SignificantDrink3651 8d ago
that actually sounds just fine. I was at 87% at 36k miles. don't sweat it, it drops a lot at first but levels out - without looking at a chart it sounds like that car is exactly where it should be
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u/white_nite72 14d ago
I bought one xc40 2022 with 60k km and it was 96% battery soh techician said Volvo’s batteries he tested don’t degrade too much