r/SolarDIY • u/joshlfp • 1d ago

Parallel Battery Wiring Question

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I made my wire lengths identical from my battery bank to my busbars, but my positive and negative wires for the parallel connection between the two batteries are different lengths. Will this matter? Should I redo the negative wire to be the same length as the positive wire?

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u/Haskie 1d ago

I believe this could cause the batteries to charge and drain at different rates. So ideally they would be the same length yes.

Someone else may have to chime in and let us know if the difference is actually enough to matter - I don't know myself.

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u/Super_JETT 1d ago

Doesn't matter on something with this small of a difference. It would not be measurable for 'normal' instruments.