Hi PowerForum, I’ve been scouring everywhere for information and always go down some rabbit hole where I think things work perfectly but I’m never quite sure. Could I get some advice or just reassurance my setup is ok? Please bear with me as this might get lengthy. I’ll try to simplify my post as much as possible though I don't think there's support for [spoiler] tags.

My setup is as follows:

The Inverters:
I have 3x 5kw Kodak (Axpert?) inverters wired in parallel as per manual, each with their own set of panels. 
Inverter on the left with 6/6 400w canadian solar panels
Inverter in the middle with 6/6 400w canadian solar panels
Inverter on the right with 9/9 320w kodak panels

The Batteries:

I have 4 different sized Pylontech batteries, and two of them have their link 1 ports melted 

1. US2000 Pylontech with Link Port 1 melted
2. US3000 Pylontech with Link Port 1 melted
3. UP5000 Pylontech new
4. UP5000 Pylontech new

 

I’m wondering if my cable sizes are safe as sometimes it feels as if the cables are running too hot. I'm using the Pylontech cable pack with 4AWG. I read somewhere I can use them for up to 5 batteries but I'm not sure. These run to a copper busbar I have installed, which feeds the 3 inverters. The blue cables are one gauge thicker than the 4AWG Pylontech cables. They measure around 11mm, outer shell included. 



The inverter settings:



The yellow highlighted fields are what I'm questioning.
What bugs me here are the different sized batteries. Our installer at the time told us the Pylontech's have their own built-in load balancing which I'm also skeptical of. 
I'd like to charge my batteries at the highest/safest current I can. Also I'm not sure about the float voltages or what they even mean to be honest.
 

I’m also really looking to get some information from my system, albeit wired or wirelessly. I have no idea where to even start with this and what equipment I need for it. My installer can't help me with it. I would like to, for instance, see how many cycles I’ve done with the batteries and so forth. Then again, how would that be possible with those two link ports that are melted.

 

Future plans include an extra UP5000 Pylontech. Far future plans include a 4th inverter and another UP5000
 

Any insight or advice would be greatly appreciated, you guys know your stuff.

Ok, so just a little something that's making my sparky-senses tingle... Creating a connection box is a good idea, makes connecting to multiple inverters much easier. However, I don't know if Pylontec is the same but most battery suppliers will advise against connecting a couple different batteries in parallel to each other. Due to differing specs and charging times most suppliers will tell you that you need to use the same battery model if you want to add another in parallel. What you have done is like connecting a 100Ah battery in parallel to a 200Ah and a 50Ah, it's got a lot of potential for poor battery charging conditions. Just a heads up 👍

Thank you, yes this is why I'm wondering what the safest charge settings would be considering the different sized batteries. It just feels like a waste to have to take the 2kw and 3kw out of the whole system. What is also quite different from most setups is that I have 3x inverters, each having their own charge rate. I might be wrong but I imagine reading somewhere the 2kw shouldnt charge more than 50a, my 3x inverters are all set to 30a making them charge at 90a? Then again, they are together with the 5kw's and I don't know about the load balancing capabilities from pylontech.

Edited January 14, 20232 yr by PiecE