Overcharging concerns:
- Not dangerous: Modern EVs and chargers are designed to stop charging automatically once the battery reaches full capacity.
- Battery management system (BMS): The BMS monitors charge levels and protects the battery from overcharging or overheating.
- Safe to leave overnight: It’s normal to leave an EV plugged in for extended periods.
- Trickle charging mode: After reaching full charge, the system may apply minimal power occasionally to maintain 100% without stressing the battery.
In short, leaving your EV plugged in longer than necessary is safe — the system manages it automatically to protect the battery.