상황
A technician needs a wiring reference to add a low-voltage cutoff and battery charge lamp to a 24V wheelchair without disturbing the motor drive path.
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01
Use a zener + relay coil as the low-voltage cutoff so the main power contactor drops out below battery threshold.
02
Keep the charge indicator across the battery after the main fuse so it shows pack voltage whenever the fuse is intact.
When retrofitting battery protection or charge status to any 24V DC mobility or small EV system with a key-switch power path.