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How To Wire multiple banks of eg4 ll2 batteries

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Adlans

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I have 3 full banks of 6 eg4 ll2 batteries (18 batteries total)
I currently have two banks tied into the battery connection lugs in an 18Kpv.
I will be adding a second 18kpv In parallel and another bank of batteries.
I have been searching diligently but have not found a discussion on wiring multiple banks.
My plan is to have the two 18kpv’s in parallel with 4 banks of batteries.
I am off grid and have 30 390watt panels providing power.
I’m looking for wiring options for the banks of batteries.
Thank You!
 
I was thinking that as a possibility but was wondering if I would then need to add a solar array to the second 18k? I’m using all three mppt’s in the single 18k but count move one array to the second 18k.
 
I use the Victron Lynx for connecting up to four banks of EG4 Lifepower4 batteries to my Sol-Ark 15K . Each bank has a 250 amp fuse on the Lynx. Maybe you could use a combination of 2x cables from the Lynx to share all 4 battery cabinets between two 18Ks.

signaturesolar.com

Victron Energy Lynx Distributor | 1000A

Signature Solar provides solar panels, off-grid solar systems, grid-tie, and hybrid systems. Quality solar inverters, bifacial solar panels, complete solar kits, solar batteries. Featuring brands such as EG4 Electronics with their solar battery, LifePower4 and EG4 LLifePower4 and EG4 LL
signaturesolar.com signaturesolar.com
 
You could connect another set of equal length cables on the right side in my picture and then hang another 18K to the right of the first one kinda like what I have in the photo.
 

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Thank You MaikaiLifeDIY. I was thinking of trying a cheap way, but I think I’d better go the smart way.
I’ll start ordering material
 
Only problem with that diagram from EG4 is that it doesn’t specify you should try to keep all your conductors equal length.

If you use the Lynx idea you would connect each battery to the Lynx with equal length conductors, and then equal length runs to each of the inverters from the Lynx.

Also here is a video that shows you how to use the Lynx with fuses.


I’ve used this for multiple installs and it works well except that there is no shutoff, but in my cases I’ll do that with the batteries. This config will easily accept 4/0 AWG conductors with ring terminals such as these.
 
Last edited:
I have 12 lifepower4 and use the lynx. Works well. I also have my chargeverter wired into it.
 
I was also thinking, if you wanted a little more isolation you could use two Lynx devices, one for negative and one for positive. That might make it easier to lay out your connections and separate your pieces a bit.
 
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