How much Engine Horse Power does an Alternator take to make power?

How much Engine Horse Power does an Alternator need to make Electrical Energy?

How much power does it take to run an alternator?

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An alternator typically takes about 1 HP (horse power) for every 25 amps of power generated. So, a 100 amp alternator will require about 4 HP at full output. Most alternators do not operate at full output for very long.