Battery life if the car sits for a year?

[NevadaTech]

Hello, I'm looking at a 2023 Kona Electric with 3000 miles on it. Yep, only 3000. My concern is the unknown state of health (SoH) for the battery. Was the car sitting at 0V for a year? I don't know. If it was sitting at 0, what is the concern? Is it that different than driving the car down 0? Is there an app that can measure SoH?

 

[electriceddy]

Hello, I'm looking at a 2023 Kona Electric with 3000 miles on it. Yep, only 3000. My concern is the unknown state of health (SoH) for the battery. Was the car sitting at 0V for a year? I don't know. If it was sitting at 0, what is the concern? Is it that different than driving the car down 0? Is there an app that can measure SoH?

If the HV pack has been sitting at a low SOC or deep discharge below the minimum voltage threshold, there very well could be some irreversible damage to one or more cells.
I use Car Scanner and an appropriate OBD reader (reference the Car Scanner website) and it works good.
Only problem... 2023 had 3P cell configuration, so it may not read the worst cell in that group. Only real way is to charge it to full and watch the cells balance, if one or more groups take longer to balance, odds are one or more are defective.

 

[NevadaTech]

I understand you are not Hyundai.
If a group of cells are bad, is that a warranty repair? Granted Hyundai may need X amount of bad cells before replacing the battery pack.