I have had my EV6 for around 2 weeks and have had 2 12v battery failures. The first was fixed by Kia via the RAC who explained how to fix it. Tha second time I got it going Ok and took it to the garage for investigation. They found nothing. Both times the car had been left overnight and the 12v battery had only 3.5v in it. Expecting more trouble. I have ordered a jump start battery pack to cover if (or when) it does.