Do AGM's charge quicker?
Looking to cut generator time. Have solar but sometimes have little to no sun when dry camping. Read AGM's charge up to 5X faster than flooded. How can that be, converter charger only puts out so mu...
Forum Discussion
jharrell wrote:
Here is my two Lifeline GPL-4CT's with my Magnum 3012 that can charge at 125 amps.
Ran the batteries down to 50% SOC then let it rip:
Time Inverter-V BMK-V BMK-Ah BMK-SOC Inverter-A BMK-A BMK-T
9:50am 12.5v 12.70v -5Ah 97%
7:35pm 12.2v 12.32v -113Ah 49%
7:37pm 13.5v 13.44v -110Ah 50% 125A 104.0A 77F Bulk
7:52pm 13.8v 13.79v -87Ah 60% 125A 105.6A 82F
8:00pm 14.1v 14.08v -73Ah 67% 125A 105.2A 86F Absorb
8:04pm 14.1v 14.14v -66Ah 70% 111A 95.8A 88F
8:12pm 14.1v 14.18v -55Ah 75% 85A 77.2A 88F
8:22pm 14.1v 14.20v -44Ah 80% 70A 60.8A 88F
8:34pm 14.1v 14.22v -34Ah 85% 51A 45.8A 86F
9:06pm 14.2v 14.32v -15Ah 93% 30A 25.8A 84F
9:25pm 14.2v 14.36v -8Ah 96% 20A 17.2A 82F
9:45pm 14.2v 14.34v -4Ah 98% 15A 11.2A 82F
10:23pm Float
As you can see the two Lifelines will accept 125 amps for about a half hour going from 50 to 70% SOC, they
will accept 50 amps up to 85%. 98% charge in two hours, full float transition in 3 hours.
EDIT--read the 3012 manual on charging. So the BMK is the monitor with the shunt. In your case the Bulk stage was at constant amps of about 105 amps. 105/220 = 48% charging rate.
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What is Inverter amps vs BMK amps? Important to use the actual amps to the battery for this calculation.
That would be the amps on the charger to battery wires, where the voltage will be higher at the charger end due to voltage drop.
You have the BMK voltage higher but the BMK amps lower (amps would be the same on those wires, so what's with that?). Please explain.
