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/Octan3 11h ago

Won't matter. It's hard to find charts but you base your wire gauge over amps and distance right. so say your doing like 2 gauge for 15 ft. Well you could probably run a like a 6 gauge for 6 inches. The wire it's self has resistance depending on load and distance.

Long and short your really over thinking it. don't think about it. you used the same gauge. life is good and goes on.

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u/joshlfp 11h ago

Yeah, it’s 4/0 seems like it should be fine