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Discussion Starter · #1 ·
How big of a 12V battery do you need for an EV?
Beside the normal car loads like lights, this battery also provides power to a BMS, a fan, fluid pumps, and the motor controller. It’ll be charged from a DC-DC converter during driving.
Will a little battery do? Or should it be something like a 125Ahr car battery?
Thank you.
 
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