Rather than bore you with multiple images that all look the same I am going to sumarize the remaining three tests with the "stored energy" screen shot.

This test was a .4C charge for two hours and when discharged back to 50% SOC, after the 2 hour charge, the stored energy removed was 44.48Ah. While not a heck of a lot more than .2C it is the attained SOC that really makes .4C different.


Let's do the math:


Baseline Ah Capacity = 95.69Ah


Discharge to 50% = 47.64Ah (left in the battery after discharge)


2 Hour charge then discharged and counted Ah's delivered back to 50% SOC = 44.48Ah


47.64Ah + 44.48Ah = 92.12Ah of stored energy


92.12 is approx 96% of the baseline Ah capacity of 95.69Ah's


BOTTOM LINE: The battery achieved approx 96% SOC in two hours at a .4C charge rate


PERSPECTIVE: Charging to 100% SOC took 5:30 minutes so this means the last 4% of returned energy took 3.5 hours to complete at .4C and the first 46% of capacity could be returned in 2 hours at .4C. The problem still remains that the last 4% is critically important to AGM longevity.