Battery hookup question

[doox00]

Hey all, I have 9 48v battery packs (with the new jk bms on each one) for my 3 eg4 6000xp inverters. How do I hook these up to the inverters (new system and learning, starting the install process now). Do I run them to bus bars, a negative and positive and from there to each inverter? Is this how you should wire them? Or should I run 3 packs in parallel to each inverter?

Thanks!

 

[Brucey]

I would run each battery to bus bars. Potentially something like three lynx power ins would give you twelve battery connections. then a distributor or power in converted with bolts to hold the megafuses, with the three 6000XPs connected to that. A smart shunt between the negatives of each to track soc.

 

[Brucey]

Make sure the battery cables are the same length, same for inverter cables

 

[Brucey]

Are these 100Ah or 280/300+ Ah batteries? May be able to parallel them into sets of three to reduce number of power in connections

 

[doox00]

Are these 100Ah or 280/300+ Ah batteries? May be able to parallel them into sets of three to reduce number of power in connections

Hey there, 5 packs are 280ah cells and 4 packs are 306 ah cells.

 

[42OhmsPA]

Hey there, 5 packs are 280ah cells and 4 packs are 306 ah cells.

Damn that's a lot of capacity, nice!
I'd use a class T fuse on each pack if you aren't already.

I agree with @Brucey 's advice above, the only thing I'd do differently is build my own bus bars but that isn't for everyone and Victron are a solid choice.

 

[Brucey]

Damn that's a lot of capacity, nice!
I'd use a class T fuse on each pack if you aren't already.

I agree with @Brucey 's advice above, the only thing I'd do differently is build my own bus bars but that isn't for everyone and Victron are a solid choice.

Yes could go with class t power ins, but only two per unit and you'd need five in total...plus say for example you use 250A fuses, two of them with two 250A fuses in each and you are at the 1000A rating of the bus. For 9 big packs another bus design would make sense.

 

[Brucey]

If I was at that kind of capacity and going off the shelf I'd be using one of these:

https://www.stellavolta.com/midnite-solar-mnbcb-2000-200-battery-combiner-box-2000a/

And then use my mnedc250 midnite DC breakers, one per battery. More arc interrupting capability than a class t, and you have individual disconnect capability for maintenance.

 

[42OhmsPA]

Yes could go with class t power ins, but only two per unit and you'd need five in total...plus say for example you use 250A fuses, two of them with two 250A fuses in each and you are at the 1000A rating of the bus. For 9 big packs another bus design would make sense.

I'm working on upgrading mine from this

To something a little different.

@doox00 , might give you some ideas.

 

[doox00]

Yes could go with class t power ins, but only two per unit and you'd need five in total...plus say for example you use 250A fuses, two of them with two 250A fuses in each and you are at the 1000A rating of the bus. For 9 big packs another bus design would make sense.

They are made in DIY cases that have breakers on each pack, do I still need fuses as well?

 

[SparkyJJO]

600A 12 Stud Busbars | Red & Black Kit

Manage high-current electrical connections efficiently with the 600A 12 Stud Busbars in a Red & Black Kit, ensuring organized and reliable power distribution in your electrical setup.

signaturesolar.com

What breakers aee you using on your boxes?

 

[Brucey]

They are made in DIY cases that have breakers on each pack, do I still need fuses as well?

In an ideal scenario there would be multiple redundant systems.

 

[doox00]

600A 12 Stud Busbars | Red & Black Kit

Manage high-current electrical connections efficiently with the 600A 12 Stud Busbars in a Red & Black Kit, ensuring organized and reliable power distribution in your electrical setup.

signaturesolar.com

What breakers aee you using on your boxes?

They are gobel power diy boxes with fuse and breakers in them and YIXIANG diy boxes (not sure if they have a fuse in them or not, waiting for them to arrive, they have breakers though).