Alternator overcharging batteries
I have 4 AGM batteries in my rig with a total capacity of 440AH (actually 880AH @ 6V, but of course they are wired to get 12V). The data sheet for my Haze batteries species a bulk -> absorption cut...
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Gerald55 wrote:
I have 4 AGM batteries in my rig with a total capacity of 440AH (actually 880AH @ 6V, but of course they are wired to get 12V).
The data sheet for my Haze batteries species a bulk -> absorption cutover point of 14.4V. Both my solar charge controller and my progressive dynamics converter are smart and can get close enough to the required profile, so I don't have many concerns there.
The alternator charging, however, is "dumb". As far as I understand it, an alternator is a voltage source, and seems to put out about 14.3V or so. So when the batteries are charging on this source, during a long drive, for example, will the alternator overcharge the batteries?
Also, will the 4 batteries accept 4x more current than the 1 battery that came originally in my coach, and will this put undue strain on the alternator?
This may be what you are looking for Download the PDF file to see how you could use it.
Good luck!
