Why does an electric car not move in rainy days despite having power?

[ZacharyAnn]

The reasons why an electric car does not move in rainy days despite having power are as follows: Water ingress or poor contact in the controller: When the controller gets wet, it cannot receive power, causing the electric vehicle to fail to move or the rear wheel to lock; if the controller gets wet, it is necessary to promptly open the controller, dry it with paper or a cloth, wipe the circuit board with alcohol, and finally let it dry before sealing and testing it. If it still does not work, replace the controller immediately. Poor line contact: Loose battery connection wires or poor contact in the power lines. Check whether the battery terminals are corroded or loose. Water ingress in the battery: Insufficient power in the electric vehicle, water ingress in the battery can lead to insufficient discharge output current.

[Queiroz]

I've encountered a situation where an electric car has power but won't move in rainy weather, and it's mostly caused by water causing electrical issues. When rainwater seeps into high-voltage wiring harnesses or battery connectors, it can lead to short circuits or oxidation causing poor contact, prompting the car to automatically shut down for self-protection. Especially when the Battery Management System (BMS) detects excessive moisture, it cuts off the power supply—so the car has power but can't move. There might also be a blown fuse, or water ingress in the control module disrupting signal transmission. My suggestion is to let it dry after parking and check the motor compartment for any accumulated water. Regularly wiping the seals after driving can prevent future issues. If the problem persists, it's best to visit a repair shop to inspect specific components. Safety first—don't force a start to avoid making things worse.

[MacChloe]

I think it's quite common for electric vehicles not to move on rainy days because moisture can affect the battery and motor systems. When the battery casing isn't sealed properly, rainwater seeps in, causing an internal short circuit that triggers the protection mechanism, and the car suddenly stops. It could also be due to sensor malfunctions reporting errors, causing the controller to receive incorrect signals and shut down the drive. From personal experience, in such cases, you should turn off the power and wait a few minutes for the moisture to dissipate before restarting. Check if there's water accumulation in the tires and rims—sometimes minor issues can be handled yourself. Pay attention to the vehicle's waterproof rating, and as a preventive measure, clean the chassis of debris before parking and regularly perform insulation tests on high-voltage components to reduce risks.

[AmirRose]

When an electric vehicle breaks down in rainy weather, I suspect it's due to operational or environmental factors. Rainwater causes slippery roads, and the vehicle's anti-skid system may intervene to limit driving force. Alternatively, moisture may splash into motor connection points, corroding contacts and causing abnormal current interruption during startup. The control unit, when damp, might misjudge fault codes, displaying errors that prevent driving. In such situations, park the vehicle to inspect and dry key interfaces, then restart the car. If that doesn't work, report for repair. For prevention, avoid driving in heavy rain or use a car cover for protection.

[DeHector]

In maintenance work, I often encounter electric vehicles not moving on rainy days, usually due to rainwater seeping into the control module or cable short circuits. Moisture and oxidation at high-voltage battery connectors cause poor contact, leading to signal loss and driving system failure. Alternatively, water affecting wipers and wheel pumps may cause sensor false alarms, triggering safety locks. Blown fuses are another common cause. The solution is to dry components in a dry place or replace seals and use waterproof covers if necessary. Regular circuit checks are recommended for safety.