Posts: 4
Joined: Mon Sep 13, 2021 10:41 am

Battery SoH 18%?

Mon Sep 13, 2021 11:36 am

I'm considering a used 2017 Soul EV, but I'm worried that the battery might be junk.

It's got about 55k miles on it. When I turned it on, the dash said 43mi left in the charge, but looked like 75% on the gauge.

I downloaded the EVNotify app and tried to get an ODBII reading and it seems to be telling me that the battery state of health is only 18%.

I've never owned an electric vehicle before, so I'm not sure what to expect. I would appreciate any advice you can give. The car is $12,000. If the battery is this degraded, might it be eligible for a replacement under warranty? Am I testing it correctly? Thank you.


Posts: 237
Joined: Tue Feb 18, 2020 12:57 pm
Location: Jersey, English Channel Islands

Re: Battery SoH 18%?

Mon Sep 13, 2021 11:27 pm

On the face of it, it doesn't look good, but it is possible that the displayed values are misleading because of lack of regular use. An important consideration is where the vehicle has been used. The 27 kWh batteries have suffered greatly in hot climates. What needs to be done is to run the battery down to less than 20%, and then charge it to 100%, and then read the SOH. That is what the KIA dealer does, but he uses the KIA test equipment to read the SOH, and pays no heed to readings from other sources.

Whether it is eligible for a free replacement battery depends on the rules KIA applies in your country. Where I live, they will wriggle out if the car does not have a complete servicing record, which means it goes to the dealer at least once a year. If it is not being sold by a KIA dealer, I would not rely on any assurances from the seller. You could ask a KIA dealer to check with the KIA Company in your country by quoting the VIN. They should have centralised records.

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