"As several commenters pointed out, the issue did not appear to involve the main high-voltage battery that powers the Tesla Model Y's drivetrain, but rather the vehicle's low-voltage electrical system. Modern Teslas, like most electric vehicles, rely on a separate low-voltage batterytraditionally a 12-volt unit, though newer models have transitioned to lithium-ion systemsto operate essential functions such as door locks, infotainment screens, and control modules. If that system fails, the vehicle can become largely unresponsive even if the main battery pack is fully charged."
"Fast charging is supposed to add energy, not take it away. But for one Tesla Model Y owner, plugging in at a brand-new Wawa charger triggered an abrupt shutdown that left her asking how a car with plenty of range could suddenly go dark. In a TikTok packed with guidance and warnings for Tesla owners, creator Emma Renee @the.emmarenee shares the details of her and her 15-year-old son becoming temporarily trapped in the car and then locked out, despite indications that it was charged for over 100 more miles of travel."
A Tesla Model Y abruptly powered down while plugged into a new Wawa fast charger, leaving the owner and her teen temporarily trapped and locked out. The car displayed over 100 miles of range but showed a “Vehicle power reduced. Powering down” message and became largely unresponsive. Technicians attributed the failure to a charging-port fault that shorted the low-voltage electrical system rather than the main high-voltage battery. Modern EVs use a separate low-voltage battery to run door locks, screens, and control modules, and failure of that system can disable vehicle functions despite a charged main pack. Commenters debated 12-volt battery issues and noted similar disablement can occur in other vehicle types.
Read at insideevs.com
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