Adjusting Voltage?

Is there a way to adjust the voltage the alternater puts out?

My D.I.C. is displaying a voltage from 14.7~15.2 - it slowly climbs and sinks... is there a regulator or such that controls this and is there a way to adjust it?

Anyone know?

Thanks a million!

they have a non adjustable internal voltage regulator.The amps are decided by the copper windings inside.The only adjustment is a custom wound alternator from an alternator shop

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