question

tcason avatar image
tcason asked

balanced battery bank cable sizing

I am re-configuring my 4x220ah 24v battery bank powered by a Victron Multiplus 3000w inverter, solar panels and alternator to conform to the Victron recommended balanced set up using appropriate busbars..

Given this configuration, I would like some recommendations on power cable sizing.

Parallel cables 12v to 24v 80 cm length

Series from 220ah to 440ah .90 cm length

Busbar to battery Positive and negative cables 125 cm length

It appears that I am in the neighborhood of a 35mm2 or 50mm2 size. Is it wise to err to the 50mm size of is 35mm good.

Also, is it best to have a consistent length for the busbar to battery cables?

Thanks


Tom


wiring
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2 Answers
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kai answered ·

multiplus manual says 50mm2 for 24V & 0-5m length.

By consistent length, if you mean between the positive and negative leads, the answer is yes. Not so much for resistance, but to minimise electrical noise. Try to keep the positive and negative leads side by side as well.

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tcason answered ·

@kai

Many thanks

Tom

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