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Charging Voltage Range

On vehicles with a 12 Volt electrical system the alternator [or generator if so equipped] output voltage is considered acceptable if it is in the range of 13.5 volts to 16 volts.

Any voltage below 13.5 volts will not adequately recharge the battery, and anything above 16 volts will tend to cause the battery to overheat, and boil-off the water from the battery.

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Q: What voltage should your alternator produce?
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What is the voltage of a car alternator and is it ac or DC?

It should produce 14.5v +/- and it's DC.


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