The typical voltage output of an alternator in an automotive electrical system is
14 volts, measured with the engine running. This voltage level helps keep the vehicle's battery charged and provides electricity to various electrical components and accessories:
Car: 14.2 - 14.7 volts
Truck: 13.8 - 14.8 volts
However, it's worth noting that variations can occur based on vehicle specifications, charging requirements, and external factors influencing the electrical system.
