Bulk-Absorption Charging Voltage
2 Concord 8D (258 AH each) Freedom 25 Inverter-Charger (130 amp) Trimetric 2025 Gauge I'm dry camping and charging my batteries. They were 30% discharged. My Concords call for 14.2-14.4v absorpti...
Forum Discussion
All the numbers look right, even the transition to float. For example, I have noted an approx. 8-9% acceptance rate at 90% soc, at 14.8v, and BFL has noted an approx. acceptance rate of 5-6% at 90% soc, at 14.5v.
So let's say 14.3v gives us an acceptance rate of about 3.5%, at 90% soc... that's about 18a. But the charger is programmed to switch to float at 21a, and in this case, that was at 88% soc. So everything is well within the ball park of what would be expected.
??? Would heavy sulfation, due to chronic undercharging, cause the battery acceptance to be drastically reduced at a lower soc, but reduced very little at say 85-90% soc ???
So let's say 14.3v gives us an acceptance rate of about 3.5%, at 90% soc... that's about 18a. But the charger is programmed to switch to float at 21a, and in this case, that was at 88% soc. So everything is well within the ball park of what would be expected.
??? Would heavy sulfation, due to chronic undercharging, cause the battery acceptance to be drastically reduced at a lower soc, but reduced very little at say 85-90% soc ???
