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, ...
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Good point for testing like that. The marker is SG in this case, so you have to wait for "SG lag" to catch up after you finish the recharge to full. (let the electrolyte cool for one thing)
The other is "progressive capacity loss" if you don't get to true full after each recharge. Sulphation builds up skewing your results.
On the recovery of a low battery after resting, my Battery Bible says it is from the only useful electrolyte being that in contact with the active material next to the plates getting more demand than it can do, then resting allows stronger acid from outside the plate area to circulate in to the pores so additional chemical reactions can occur between sulphuric acid and the lead plates. So not really a Peukert effect as such depending how you look at it but it does relate to a lower draw being easier for the chemistry action to keep up with the demand I guess.
Be a couple hours before I can start Part 2, and it could take six hours if it only doubles the time, but I am expecting longer than that, we'll see.
Another testing issue is how lights (as the load) dim (pulling fewer amps) as battery voltage falls, so you have to add more lights to keep the amps constant as the test runs on.
The other is "progressive capacity loss" if you don't get to true full after each recharge. Sulphation builds up skewing your results.
On the recovery of a low battery after resting, my Battery Bible says it is from the only useful electrolyte being that in contact with the active material next to the plates getting more demand than it can do, then resting allows stronger acid from outside the plate area to circulate in to the pores so additional chemical reactions can occur between sulphuric acid and the lead plates. So not really a Peukert effect as such depending how you look at it but it does relate to a lower draw being easier for the chemistry action to keep up with the demand I guess.
Be a couple hours before I can start Part 2, and it could take six hours if it only doubles the time, but I am expecting longer than that, we'll see.
Another testing issue is how lights (as the load) dim (pulling fewer amps) as battery voltage falls, so you have to add more lights to keep the amps constant as the test runs on.
