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Old 25-07-2014, 03:19   #1
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Location: Whangaroa, New Zealand
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alternator question

Will a alternator that has a sticker on it that says 35amps mean that it can charge a FLA (providing it is big enough to take the charge) at 35 amps? is 14.4 volts from the alternator high enough to charge FLA? Just want to be clear.
Also how do I know the charge C rate of a FLA battery?
I am use to working with lipos and lifes in the rc hobby, they are easier for me to understand. cheers
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Old 25-07-2014, 03:35   #2
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Re: alternator question

If an alternator is labeled as 35 amps then theoretically it can output 35 amps into a battery or other load. However depending on the alternator construction and how the maker rated it that does not necessarily mean that the alternator can do that continuously without burning out. That could be the max output at a low temperature. The safe output when it's hot and running continuously is likely much less.

14.4 V is certainly high enough to charge a lead acid battery. A fully charged FLA battery at rest (no load and time for voltage to settle after charging) will be about 12.6 V and less when discharged so plenty of differential for charging.
The water is always bluer on the other side of the ocean.
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