Im going to buy 2 Duracell 31 DTMAGM. Now I'm just a weekend fisherman. My charger choice is Dual Pro at 15 amp per bank. Is that to much or should I go with a Sportsman Series at 10 amp per bank. For the AGM batteries is slow charging better for them. Or will the 15 be to much.
Thanks
Last edited by fishnmaine; 03-25-2017 at 06:53 PM.
AGM batteries are compatible with a wide varieties of amperages and chargers.
Your charger on the other hand needs to be compatible with AGM.
Most chargers have an AGM mode, or are "smart" enough to detect the difference.
Per my experience, 15 amps is not too high for an AGM battery. That is just the maximum your charger is capable of. It would make this amount available if your AGM's need it, but it will automatically taper off once the initial jolt is accepted.
15 amps per load circuit is stout.
Theoretically, the faster your batteries are recharged, the longer they will last. So, 15 amps per bank is great. IMO, that DP Pro Series charger is the best onboard charger around. Week end fisherman or not, those batteries with that charger will be an awesome set up, and, if you practice good charging habits, should last a long time.
2019 BCB Classic
Merc V8 200 4S
Optimas are the only AGMs I am aware of that severely limit their charging amperages. But there may be others.For the AGM batteries is slow charging better for them. Or will the 15 be to much.
??? Am unaware of any of our popular available marine chargers that are smart enough to detect the unique presence of an AGM and as a result alter their charging profiles.Originally Posted by LittlePech
Minkota chargers do... But they are several hundred $$$$
Would be a very useful capability having optimal charging for a battery type without manually telling the charger what type of battery is connected. But the current D or PC series as I understand do not auto-detect the battery type.
The D series is the older charger line and does have Automatic staging, but the stages are sequenced based on charging voltage/currents during charging regardless if the battery is a Flooded or AGM; there is only one overall charging profile and it is applied to all batteries whether they be a Flooded or AGM chemistry.
The PC series does offer us different charging profiles for different battery types..an improvement over the D series. The selection of AGM or Flooded though ss manual with the selection of battery type being made by the user during charger setup.
Problem for charger designers is how would a charger reliably detect an already discharged battery's chemistry only by its connections to the charging leads when the size of the battery is unknown and can vary greatly?
Last edited by Lou r Pitcher; 03-26-2017 at 08:11 PM.
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