Can the Vehicle Charge While Idling?

1 Answers
JosiahLee
07/29/25 8:53pm
Vehicles can charge while idling, but the charging efficiency is not optimal. After the engine starts, the electricity generated by the alternator is primarily used to power the vehicle's own electrical systems, leaving little surplus current. The current only becomes sufficient when the engine speed exceeds 2000 RPM, so idling charging is not recommended. Below are specific details: 1. Modern vehicles use alternators for charging. The battery's power is mainly used to start the vehicle, which consumes a significant amount of energy. However, once the engine is running, the battery is no longer drained. 2. The power consumed during startup is replenished through the vehicle's charging circuit. Charging can occur while idling, but the charging current is relatively small. 3. Typically, household car batteries have a capacity between 54-60Ah. Battery capacity indicates the amount of power the battery can discharge under specific conditions (discharge rate, temperature, cutoff voltage, etc.). 4. The capacity of car batteries is usually measured in Ah. For example, a 60Ah battery can continuously discharge at 1A for 60 hours.
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