Posts: 4
Joined: Wed May 06, 2020 8:09 am

Re: 2015 Soul EV: My Battery Replacement Story

Sat May 23, 2020 2:45 pm

tizjep wrote:
tizjep wrote:I bought a 2015 Kia Soul EV from Carvana last month. It was showing about 56 miles when fully charged. It took about a month to get the logistic setup for transporting it to the nearest certified EV Kia service center (Schamburg, IL). I am scheduled for diagnostics next week... I am hoping that all goes well...

It has been at the dealership since 5/14/2020. They had a tech look at it and have been waiting for diagnostics from KIA since then... They said that the initial diagnostic showed that my battery has low voltage.

The dealer called today and told me that my high voltage battery was faulty. They have ordered a replacement and expect to have it installed by the end of next week.

Posts: 3
Joined: Mon Jul 27, 2020 11:59 am

Re: 2015 Soul EV: My Battery Replacement Story

Mon Jul 27, 2020 12:29 pm

That's great you got yours. I took my 2015 into Garden Grove Kia and they told me that the SOH was 92%. Now keep in mind the GOM says 60Miles at 100% uh... What is wrong with this picture? I submitted a complaint to Kia and they told me there was nothing they could do, they had to go off what the dealership said. So I did a test or two myself. Just a simple little, "run it around the battery charger" until the % just changed from 5 to 4% that should be about 4% charge. I DC fast charged it to 94% using 16.9KWh - so (correct if wrong) (94%-4%)=90% so with the original 27KWh capacity that should yield a SOH of (27KWh x 90%)/16.9KWh = 69.54% which is a far cry from 92% and just into warranty territory. What can I do since they seem to be denying reality?

Posts: 104
Joined: Tue Feb 18, 2020 12:57 pm
Location: Jersey, English Channel Islands

Re: 2015 Soul EV: My Battery Replacement Story

Mon Jul 27, 2020 3:09 pm

Actually, you have written the formula incorrectly, It should be Measured kWh/(27x90%), which is what you actually did to get the 69.54% SOH.

However, the charger's measurement of kWh includes the power wasted as heat during the charging process. If 1 kWh was waste heat, the SOH would have been 65.43%

Try this: Zeroise the performance meter (the one next to the speedo which states m/kWh), note the mileage, and then drive back down to 4% and see how many miles you have covered for that 90% usage (call that M). Note the m/kWh reading (call that x) and work out how many kWh the car thinks you used. i.e. M/x. Use that to estimate SOH.

Alternatively, go to another KIA dealer, and get them to measure SOH without telling them that you have already had a figure from Garden Grove.

Posts: 80
Joined: Mon Jan 29, 2018 11:56 pm
Location: SoCal, CA

Re: 2015 Soul EV: My Battery Replacement Story

Sun Sep 06, 2020 12:52 pm

It's a particularly hot weekend here in SoCal, with temps above 120F (49C):


I decided to check the battery data since I was curious, and also it's been a while since the last check.
Update on my car after exactly 2 years and 6 months and 15.3k miles later:



SOH is down to 101%.. The min/max deterioration values moved around. Other than that, there's not much to report.
Due to COVID, I haven't been using my Soul EV much at all. That's why there's only 2.3k mile difference between my last reporting 10 months ago.
2015 Soul EV+ | 52k miles
2017 Bolt EV Premier | 62k miles

Return to “Batteries and Charging”