Deep cycle battery charge times
I know there's alot of variables but (rough estimate) what amount of time should I expect to charge my batteries daily. My setup Honda 2000 75 amp powermax boondocker charger 2 gc2 golf cart bat...
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Determining when an AGM battery is full, requires an ammeter, or a amp hour counting battery monitor.
HOld long absorption stage is to be held, is highly dependent of state of charge on the battery, how long since its last full recharge, the overall health of the battery, and temperature.
LifeLine AGM says 20 amps per 100AH minimum when deeply cycled. Hold 14.4v until amps taper to 0.5amps for a 100AH battery, and then the battery can be considered fully charged
I've seen my 90AH Northstar AGM taper to 0.42 amps at 14.46v in 3 hours, I've also seen it take 11 hours. 6 of those last ones at 1 amp or less.
Far too many people think that once a charging source drops to float voltage, that this means the battery is fully charged. IT DOES NOT mean this, only that absorption voltage was held as long as it was programmed to do so.
6 more hours might be required at absorption voltage before amps taper to 0.5% of capacity at absorption voltage.
The less healthy the battery, the longer it takes to reach this threshold where the AGM battery can be considered fully charged.
Get an ammeter and see what the battery is accepting at absorption voltage, otherwise you are basically completely blind and simply guessing as to AGM state of charge.
HOld long absorption stage is to be held, is highly dependent of state of charge on the battery, how long since its last full recharge, the overall health of the battery, and temperature.
LifeLine AGM says 20 amps per 100AH minimum when deeply cycled. Hold 14.4v until amps taper to 0.5amps for a 100AH battery, and then the battery can be considered fully charged
I've seen my 90AH Northstar AGM taper to 0.42 amps at 14.46v in 3 hours, I've also seen it take 11 hours. 6 of those last ones at 1 amp or less.
Far too many people think that once a charging source drops to float voltage, that this means the battery is fully charged. IT DOES NOT mean this, only that absorption voltage was held as long as it was programmed to do so.
6 more hours might be required at absorption voltage before amps taper to 0.5% of capacity at absorption voltage.
The less healthy the battery, the longer it takes to reach this threshold where the AGM battery can be considered fully charged.
Get an ammeter and see what the battery is accepting at absorption voltage, otherwise you are basically completely blind and simply guessing as to AGM state of charge.
