this post was submitted on 21 Nov 2025
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Electric Vehicles

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The sites I tried fell into a 50/50 between the main battery and the 12V. Can I go to a Drive-In theatre and keep my radio on for 2h? Thanks.

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[–] artyom@piefed.social 8 points 2 days ago

I don't know what the hell sites you're on but no radio is going to run off of 400V.

The 400V batt is commonly referred to as the "traction battery". This obviously powers the wheels, but also typically the HVAC and the brake booster, and probably some other things I'm forgetting.

Everything else runs off the 12V (or 48V in case of the Cybertruck).