How much current is required when starting a car?

[Camilla]

When starting a car, the current typically ranges between 100 to 300 amperes. If the car's engine has a larger displacement, the starting current will correspondingly increase. The starting process involves the starter motor driving the engine via the flywheel until it reaches a speed of 500 to 800 revolutions per minute, at which point the engine ignites. After this, the starter motor's gear disengages from the flywheel's ring gear. Once the car is started, the alternator begins to work, generating current primarily to power the vehicle's electrical components. If the current produced by the alternator exceeds the current consumption of the onboard electrical devices, the excess current is used to charge the battery. The alternator has power limitations; for passenger cars, the alternator's power is generally between slightly over 1 kilowatt to 2 kilowatts. If the battery is fully charged, the alternator will only output the amount of current consumed by the onboard electrical devices, ensuring no waste occurs.