I Bought a 2017 Soul EV + in 2019.
The first year or so I got about 100 miles of range which got me to work and back twice. [46 round trip]
I like the car and want to keep it, but the range was showing 56 miles when 100 miles after charging. I have a 1500 foot elevation gain as I return home so it is really closer to 65 miles that I can drive.
I scheduled an appointment at a local Kia Dealer in Stockton and ordered the Soul EV Spy app. It showed 64% SOH which confirms what I suspected. I told the Dealer that I wanted Them to test the State of Battery health and they booked an appointment a month out so that the Kia EV specialist would be there. I dropped it off and they said it had a recall and they would take care of that at the same time. It was recall SA473 which resulted in them resetting the BMS but not checking the SOH. He showed me a screenshot of the diagnostic tool that showed all the cells were between 3.86 and 3.88 and the SOC was 65%. I tried to explain the difference between SOH and SOC but got nowhere. I took the car home after 5 days and had to charge at a level 2 for an hour to make the 62 miles home. The GOM showed 100 miles of range so the BMS was surely reset or replaced.
I am going to drive it for a week or so then take a picture of the GOM and Percent charge when it shows less than 60 miles range. I am considering trying another dealership next time. I could not find a list of dealers that had training in working on EV issues.