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LifePO4 ah dropping voltage staying constant

lj1064

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Jan 2, 2021
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The voltage on my 48v 200AH diy battery is not dropping while the AH are. I have a overkill 16s bms and a MPP LV5048. Current draw is apx 1.65A/90W battery voltage is staying about 52V while the AH continue to drop. Sun is down and no charging by utility. Any help would be much appreciated.
 

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That is how lithium drains… the shunt is reading Ah discharge. The cells will hold voltage and drop capacity, voltage will drop, but at 3.2V there is a lot of drop with little voltage change.
 
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