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

2 Answers
ZacharyAnn
07/28/25 11:09pm
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.
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Queiroz
08/12/25 3:34am
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.
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