It can be repaired. Here are the details: 1. Classification by electric vehicle battery voltage: The under-voltage protection value for a 36V electric vehicle is 31.5V, and for a 48V electric vehicle, it is 42V under-voltage protection. This means that if the overall voltage of the vehicle is lower than this protection value, the controller will stop working to prevent over-discharge of the battery. If the electric vehicle shows an under-voltage warning while driving, or if it has not been used for a long time, the battery may still be in a discharge state whether in use or not. Simply charge the battery fully with a dedicated electric vehicle charger. 2. Check if the battery is fully charged: If the battery is fully charged but the electric vehicle still shows an under-voltage warning, inspect the wiring and the power display meter. 3. Poor contact at the battery output: Or the battery terminal may be broken. Gently pull the wires; some may be corroded inside and not visible from the outside. 4. Battery failure: The battery separator may be burned through, usually caused by high-power surges. 5. Meter failure: The meter may be faulty, or the power supply line plug may be loose, or the fuse may be blown. 6. Main line control switch damage: Poor contact leading to under-voltage. 7. The ignition switch is prone to poor contact: Poor contact causing under-voltage; verify by connecting the controller's thick red wire with the thin red wire.
