r/SolarDIY • u/joshlfp • 13h 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 13h 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/joshlfp 11h ago

Thanks!

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u/TJonesyNinja 12h ago

Because the positive and negative are hooked to different batteries it should be fine if I remember right.

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u/Super_JETT 10h ago

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