Hi, i’d like to have the most bang for the buck. The idea is to use two sealed Lead-Acid batteries with 12V nominal in series to arrive at 24V total. the idea is that no Batterie Management System ist needed, so the total cost for the buffer is lower compared to a lithium system with equal inner resistance.
What concerns me: Wikipedia states that even though a 10ah Lead Acid battery can be discharged at 100A for a couple of seconds, it can be charged with only 5A, cause voltage would climb to more than 2.65V per cell. That is 1/20 of the discharge current
For comparison: A Sony VCT4 LiIon battery can be discharged with 30A but can be charged with 10A at nominal voltage (3.6V). So the charge to discharge current ratio is at 1:3, much better than the Lead Acid.
Did anyone test gel-type Lead Acid batteries with Regen? How can be explained that Lead acid seems to have completely different inner resistance values for charge and discharge process?