question

eyrere avatar image
eyrere asked

3parallel Multiplus Battery to lynx busbar cable size

Hi,

I have 3x multiplus 5's connected to a 48V lead acid bank.

What is best option/ way to wire from battery bank to lynx distributor? Cable size req works out to 185mm for 600A surge power? Seems too big an hard to work with?

Any tips?


Cheers


48v batterybattery connection
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2 Answers
seb71 avatar image
seb71 answered ·

You have a few batteries/strings in parallel?

Wire each one separately to the busbars. Make sure all positive wires are the same length. Also make sure that all negative wires are the same length.

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eyrere avatar image eyrere commented ·

Lead acid bank, not lithium and multiplus System is in 3 phase configuration, so individual units have 70mm protected by 200A c/b but trying to size the common cable from bank to distributor @ peak discharge.

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seb71 avatar image seb71 eyrere commented ·

but trying to size the common cable from bank to distributor @ peak discharge

That's what I am talking about. Depending on what that battery bank is made of, a "common cable" might not be required.

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eyrere avatar image eyrere seb71 commented ·

It will look like photo below I will definitely need a cable betwen bank and dist? Or am I missing something with the calcs?

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eyrere avatar image eyrere eyrere commented ·

80a36fcf-8bae-421d-bd9e-5947bea90525.jpeg

..

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seb71 avatar image seb71 eyrere commented ·
I keep asking how it is your battery bank?


Individual 2V cells, 6V or 12V batteries and how are they connected? One string? More strings in parallel?


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tom4x avatar image
tom4x answered ·

Cable size req works out to 185mm for 600A surge power?

How do you calculate the 600A? The maximum charge current per MPII 48/5000 is 70A, per unit. 200A per unit is the recommended fuse size and 70mm² is the recommended cable diameter. Per unit.

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eyrere avatar image eyrere commented ·

System is in 3 phase configuration, so individual units have 70mm protected by 200A c/b but trying to size the common cable from bank to distributor @ peak discharge.

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