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Old 20-02-2015, 06:54   #1
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Alternator Output?

What's the normal/best way to test the maximum output of my alternator? I do have a cable clamp type amp meter. Should I just run down the batteries and test the amps when charging? Seems a silly question, but I know there are sometimes set methods.
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Old 20-02-2015, 07:07   #2
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Re: Alternator Output?

You can connect the field straight to 12V for a short time to measure output with your clamp meter.

Otherwise, run the batteries down low.

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Old 20-02-2015, 09:37   #3
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Re: Alternator Output?

But a load on the batteries larger The size of alternator. Like inverter + heater

Ie with 100a alt put a 150a load on battery. Should get 100 clamped on alt and -50 from battery

Rev up engine. You won't get Max at idle
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Old 20-02-2015, 12:42   #4
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Re: Alternator Output?

Some internal regulated alternators have a test hole, used to go "full field" to test output. Need to google your brand.

Good luck

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