What wire size do i need from my inverter to my battery bank?

[Thunderstorm2011]

I got the EG4 server rack and 4 EG4 LifePower4 Lithium Battery | 48V 100AH. and a 3000 watt inverter and was not sure what size cable i need from the battery bank to the inverter?

 

[sunshine_eggo]

I got the EG4 server rack and 4 EG4 LifePower4 Lithium Battery | 48V 100AH. and a 3000 watt inverter and was not sure what size cable i need from the battery bank to the inverter?

3000W / 51.2V /.85 = 68.9A

Wire rated for 68.9A or higher and a class T fuse on the (+) side rated for 1.25X wire rating.

 

[ShaneC]

You'll have better luck for questions like this in https://diysolarforum.com/forums/beginners-corner.52/

To give a quick back of the napkin starting point though you work out the current (3000/48) and size your cable based on that and the required length.

Edit: @sunshine_eggo gave a much more complete answer

 

[Thunderstorm2011]

3000W / 51.2V /.85 = 68.9A

Wire rated for 68.9A or higher and a class T fuse on the (+) side rated for 1.25X wire rating.

I do have 2 AWG gauge standard copper should be enough?
I know signature solar says 0/4 gauge to get max out of it but i have a 63 amp breaker that has never tripped. i dont need the max output of the system. i live a mostly off grid life

 

[740GLE]

4/0 always 4/0

I do have 2 AWG gauge standard copper should be enough?
I know signature solar says 0/4 gauge to get max out of it but i have a 63 amp breaker that has never tripped. i dont need the max output of the system. i live a mostly off grid life

how long is the run?

5’ is much different than 25’

 

[Thunderstorm2011]

6 foot is all i need for the run, just measured

 

[ShaneC]

2Awg should be fine for a 6ft 63A max.

 

[RebelRob]

I do have 2 AWG gauge standard copper should be enough?
I know signature solar says 0/4 gauge to get max out of it but i have a 63 amp breaker that has never tripped. i dont need the max output of the system. i live a mostly off grid life

I've never seen a 63 amp breaker...

 

[yodamota]

I've never seen a 63 amp breaker...

here is one https://www.midnitesolar.com/productPhoto.php?product_ID=183&productCat_ID=16&sortOrder=18&act=p
1amp - 63amp

 

[Whats-n-Watts]

3000W / 51.2V /.85 = 68.9A

So I am clear the .85 is inverter efficiency? Thanks and Merry Christmas

 

[Dave in AZ]

So I am clear the .85 is inverter efficiency? Thanks and Merry Christmas

Yes.

 

[Whats-n-Watts]

Yes.

Thank you Sir