A healthy system should maintain a voltage between about 13. This range ensures your battery stays charged without overloading your electrical system. If the voltage hovers at or below 12 volts while driving, your alternator might not be doing its job. The normal voltage range for a properly functioning alternator is generally considered between 13. A voltage of 14.
What is a healthy battery voltage?
Your vehicle has a complicated electrical system that requires constant power so that all components work properly. Therefore, a charged battery should be 12. This is a sign of a healthy, fully charged battery. Your car battery voltage should typically have a voltage reading between 12. With the engine off, the resting voltage should measure 12.