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Old 17-05-2020, 09:04   #1
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12 or 24V alternator

What is creating the heat in an alternator is it the amps A or the effect W?
Which alternator will run cooler:
12V and 200A
24V and 100A
or will it be the same temperature for both?
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Old 17-05-2020, 09:13   #2
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Re: 12 or 24V alternator

All other things equal, which they rarely are, they will run about the same temperature since they are outputing the same about of power. (2400 Watts)
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Old 17-05-2020, 09:24   #3
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Re: 12 or 24V alternator

Most stock 12V alternators are Lundell alternators. These are not particularly efficient, and they also don’t scale up well to 24V. They are, however, cheap to build. The heat comes from inefficiency, so you may find that a 24V alternator might be built differently and might be more efficient and thus will produce less heat for the same power output. But this all depends on the specific alternator models.
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Old 17-05-2020, 09:25   #4
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Re: 12 or 24V alternator

The higher voltage alternator will run considerably cooler.
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