What is the voltage of a car's power supply?

1 Answers
StVivienne
07/25/25 4:16am
There are two types of car power supply voltages, as detailed below: 1. 12V system: The battery voltage should be around 13 volts when unloaded, and no less than 11 volts under load is considered normal. If it falls below this voltage, starting the car may become difficult. 2. 24V system: The battery voltage should be around 26 volts when unloaded, and no less than 22 volts under load is considered normal. If it falls below this voltage, starting the car may become difficult. The generator should produce a voltage between 13.5-14.5 volts for a 12V system and between 27-29 volts for a 24V system.
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