Battery Draw Bogus Math? Peukert UPDATE 2
Update- 11 Oct 20, Update 2- 12 Oct 20 Thinking one 100AH battery that can be drawn down to very low SOC gives you nearly the same "usable AH" as two regular AGM or Wet batts, as seen advertized, ...
Forum Discussion
Of course it takes longer to discharge a battery at a lower rate; that would be true even with no Perkuet effect. If you halve the discharge rate, the time to reach a given state of charge is twice as long (without Perkuet).
For the chart you show, the 20 hour rate is apparently 5.25A. Half that, about 2.6A, would apparently give about 42-43 hours to the same state of charge. If you had a pair of batteries at the 5.25A total rate of discharge (so each battery sees 2.6A), the time would likewise be 42-43 hours, slightly over twice as long for twice the capacity. The difference in capacity based on discharge rate is maybe 6%--42ish hours actual vs. 40 hours expected.
For the chart you show, the 20 hour rate is apparently 5.25A. Half that, about 2.6A, would apparently give about 42-43 hours to the same state of charge. If you had a pair of batteries at the 5.25A total rate of discharge (so each battery sees 2.6A), the time would likewise be 42-43 hours, slightly over twice as long for twice the capacity. The difference in capacity based on discharge rate is maybe 6%--42ish hours actual vs. 40 hours expected.
