Quote:
Originally Posted by Seymore Butts
Keep in mind that your charging system will never keep an AGM battery fully charged. Somewhere on the label it should tell you the recommended charging voltage, usually 14.2 - 14.4 v for AGM.
On my 08, the alternator output never exceeds 14.1, and even then, only for a short period. Usually, it runs in the high 13s.
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It’s a fair statement given what we know about deep cycle AGMs, but that rule of thumb does not apply to all AGM batteries. Always check manufactures recommendations for charge voltages.
A starter AGM is pretty much a direct drop in without much worry about. You might see a small difference in voltage requirement but nothing significant.
The 3 most common charging profiles would be Normal, AGM, and AGM+ which is generally what something like an Odyssey would use. The difference between Normal and AGM might be about 0.2VDC
