Better is one way to describe but I prefer wrong. Current follows the path of least resistance. In figure 1 the first battery gets all the current. The second battery will receive and use some amount, too much math involved to determine just how much.
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SOB
2015 Volvo VNL780 D13, iShift, 32k ET air hitch, Idle Free LiFePO4 APU
16.8KWhr LiFePO4, 2.52 kw solar, 10kva Victron split phase
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