Does DEKA make a good UPS battery?
I took a trip yesterday down near San Diego, it was twofold. One was to replace my free Trojan T-1275 that was a golf cart reject already when I got it with a pig of a 105# UPS 145ah AGM battery from ...
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It's not unusual for AGM batteries to suck large charging currents for a short time when starting a charge session.
My new 230 amp-hour AGM bank - and previous 200 amp-hour AGM bank - will/would spike the engine alternator to over 50 amps briefly before settling down to a slow decline from about 30 amps on down as we drive between campsites.
I've noticed that when charging current finally reaches "zero" using the 13.6 volt RV's converter for whatever time required ... that the ammeter still reads zero if I start the engine so that 14.XX volts is then hitting the batteries. I call this a "hard stop" on the AGM batteries ... at this point hitting them with a higher charging voltage does nothing ... hence they're been fully charged from only the converter's 13.6 volts.
I don't believe that wet cells act this way. I believe wet cells will sit there with trickle currents flowing through them forever if charging level voltage is still applied after reaching their "fully charged" point and that this is what causes the water to evaporate out of them. I just used the word "believe" two times - so I'm open to facts explaining why this is not really what happens with respect to wet cells. :)
My new 230 amp-hour AGM bank - and previous 200 amp-hour AGM bank - will/would spike the engine alternator to over 50 amps briefly before settling down to a slow decline from about 30 amps on down as we drive between campsites.
I've noticed that when charging current finally reaches "zero" using the 13.6 volt RV's converter for whatever time required ... that the ammeter still reads zero if I start the engine so that 14.XX volts is then hitting the batteries. I call this a "hard stop" on the AGM batteries ... at this point hitting them with a higher charging voltage does nothing ... hence they're been fully charged from only the converter's 13.6 volts.
I don't believe that wet cells act this way. I believe wet cells will sit there with trickle currents flowing through them forever if charging level voltage is still applied after reaching their "fully charged" point and that this is what causes the water to evaporate out of them. I just used the word "believe" two times - so I'm open to facts explaining why this is not really what happens with respect to wet cells. :)
