Kia EV9's 12-Volt Battery Issues
Despite charging to 100% the night before, a Kia EV9 owner experienced their 12-volt battery dying for the third time in six months, 200 miles from home.
The EV9's flawed charging logic is exposed, as it fails to charge the 12V battery to a full 14.4V when plugged into a Level 2 charger.
This issue is part of a larger problem with 12-volt auxiliary batteries in electric vehicles, particularly those built on Hyundai Motor Group's E-GMP platform.
The transition to electric vehicles has introduced new categories of technical challenges that differ significantly from traditional automotive problems.
- Persistent failure of 12-volt auxiliary batteries in electric vehicles.
- Stranding drivers with fully charged main batteries but completely inoperable vehicles.
Brian Jones's experience with his Kia EV9 is a notable example, with three 12-volt battery failures in six months of ownership.
Author's summary: Kia EV9's 12V battery dies repeatedly.
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