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Parallel LV6548 wire gauge for future proofing?

Gurusi

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Aug 10, 2022
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Hey, I am trying to confirm wire gauge and T Fuse sizing for X2 LV6548's in parallel. Ive looked at various calculations and read other similar posts and posted here (derailed into breakers and pre charge disconnects!). I became set on:-

2/0 AWG from the inverter to the bus bars (edit:- 600amp bars)
2/0 AWG from bus bars to the batteries
T Class fuse 200amp for each battery

Batteries will be two sets of 16 * 3.2V * 280Ah with their own T Class fuse.

Does this seem good enough?


IF I wanted to future proof my wiring and fuses for having X4 inverters what would be the correct wire AWG and fuse in this scenario? Also is it worth future proofing or just replace when I'm upgrading?

If ive left out important information on my setup to get help let me know, still learning.

Thanks
 
Last edited:
Hey, I am trying to confirm wire gauge and T Fuse sizing for X2 LV6548's in parallel. Ive looked at various calculations and read other similar posts and posted here (derailed into breakers and pre charge disconnects!). I became set on:-

2/0 AWG from the inverter to the bus bars (300amp bars)
2/0 AWG from bus bars to the batteries
T Class fuse 200amp for each battery

Batteries will be two sets of 16 * 3.2V * 280Ah with their own T Class fuse.

Does this seem good enough?


IF I wanted to future proof my wiring and fuses for having X4 inverters what would be the correct wire AWG and fuse in this scenario? Also is it worth future proofing or just replace when I'm upgrading?

If ive left out important information on my setup to get help let me know, still learning.

Thanks
Depending on how big you intend to grow your system. I used 4/0 between each battery racks 30 kWh each (600A) to a terminal box with CBs and Bus. Then I used matched size 2/0 from CBs to each inverter. See picture.
 

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Depending on how big you intend to grow your system. I used 4/0 between each battery racks 30 kWh each (600A) to a terminal box with CBs and Bus. Then I used matched size 2/0 from CBs to each inverter. See picture.

Thanks for the info. What amp breakers are you using?
 
I believe my setup is a similar voltage; however would be interested in other opinions on the fuse size and wire gauge.
 
Any other input on my planned gauge and amp fuse? Will it be ok with future additional batteries and inverters?
 
I would go bigger busbars if you're going to expand later. I have (2) 6500EXs and I started with 600A busbars. I have plans to move to 1000A bars later as I add battery capacity.
 
I would go bigger busbars if you're going to expand later. I have (2) 6500EXs and I started with 600A busbars. I have plans to move to 1000A bars later as I add battery capacity.
Agreed. I posted my battery box above. I am not a big fan of exposed puny busbars like many use. Attached is a better angle without the cables. You can get these on Amazon for $38 each.
 

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This post inspired me to write up some instructions and build materials on designing a battery to inverter interconnect box. Perhaps this will help.

Thread 'Battery to Inverter Interconnect Design busbar (buss bar) Interconnect Design'
https://diysolarforum.com/threads/b...gn-busbar-buss-bar-interconnect-design.53441/
Thanks for the specifics on your design and process, appreciated. I double checked and I have 600A blue sea busbars. But as said may be worth upgrading if expanding my system.
 
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