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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If your voltage regulator in your vehicle only allows 14.3 maximum, then there is no risk of overcharging as long as the batteries are not in the engine compartment exposed to engine heat for hours and hours on end.
However that much AGM capacity will max out your alternator and its circuit shortening its lifespan.
My Single group 27 AGM maxes out my alternator when depleted. It states 14.46 is the absorption/max voltage, but it regularly gets 14.9v when driving and is over 2 years old with over 200 deep cycles on it.
Make a forced cold air intake for the alternator with a bilge blower if your charging circuit is thick enough to allow the batteries to overwhelm the alternator
However that much AGM capacity will max out your alternator and its circuit shortening its lifespan.
My Single group 27 AGM maxes out my alternator when depleted. It states 14.46 is the absorption/max voltage, but it regularly gets 14.9v when driving and is over 2 years old with over 200 deep cycles on it.
Make a forced cold air intake for the alternator with a bilge blower if your charging circuit is thick enough to allow the batteries to overwhelm the alternator
