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There is not really any Peukert's effect when charging. You have to replace the actual amp hours used plus 5 to 10 percent to make up for the charge efficiency being less than 100% for lead acid. If you amp hour counter is displaying a Peukert's adjusted amp hours available or percentage SOC then it is indicating you have removed more amp hours than you have actually removed. You will need some type of correcting factor to scale up the amp hours returned during charge.

I feel it would be better to determine the actual amp hours you have available at EV discharge rates and enter than for the battery capacity and set the Peukert's exponent to 1.0 (no Peukert correction.) This will typically be only 50 to 60 percent of the nameplate capacity. The meter will scale your SOC based on that part of the capacity that is actually available. Since it will be showing actual amp hours you don't have to do any number fudging when you charge.
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