In reference to [this post. ](https://www.theverge.com/2024/6/21/24183439/tesla-model-y-arizona-toddler-trapped-rescued)
In: Engineering
Nearly every part made for modern cars that works off electricity uses 12V; radios, motors, sensors, etc. It is easier and cheaper to use those existing parts. It is also easier, cheaper, and more efficient to run those parts from a 12V battery than to convert the high voltage of a larger battery down to 12V all of the time.
You could go to the store (high voltage battery) for every meal but it is easier and faster to grab something from the cupboard/pantry (12V battery).
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