Here's a breakdown of the voltage output from an alternator:
1. Charging Voltage: When the engine is running, the alternator generates electrical energy and supplies power to the vehicle's electrical system. The alternator output voltage during charging is usually between 13.8 and 14.5 volts. This voltage is high enough to replenish the charge lost by the battery during engine cranking and to meet the electrical demands of the vehicle.
2. Float Voltage: Once the battery is fully charged, the alternator switches to float voltage mode to maintain the battery's charge level. The float voltage is typically around 13.5 to 13.8 volts. This lower voltage prevents overcharging and helps extend the battery's lifespan.
It's important to note that the voltage output from the alternator can vary slightly depending on the vehicle's make, model, and specific electrical system. If you're experiencing issues with your vehicle's battery or charging system, it's best to consult a qualified mechanic or refer to the vehicle's service manual for specific voltage specifications and troubleshooting procedures.
