Technical question regarding string inverters and watts per string

[solarix]

Fronius inverters just have a single input so all the strings are wired in parallel and ought to be the same length. Interesting that the installed design is one panel short on one of the strings. The added panel should really be added to the string of 8 so that they will all be the same. I also wonder why they did not originally wire it as 2 strings of 13? You could go find the "Fronius online string sizer" and play with different combinations.

[MARKSDCA]

So I have 26 panels on a Fronius 6000 watt inverter. My max typical wattage is 5600-5800 at mid-day.

I have three strings of 9-9-8 panels.

I have a leftover panel identical to the 26 panels. I also have a place to mount it that would not require ANY new racking as it would just fit into an empty space on the existing setup....I just need the clamps.

The question is.....does it matter where I add it? Can my final config be 10-9-8 or does it have to be 9-9-9? I would kind of like to just add it to the string that is physically closest to where it would be mounted. I think that would make it 10-9-8. Otherwise I think there would need to be a bunch of wire run to tie it into the string of 8 which isn't close by but doable I suppose.

I don't need to do this right away...I was thinking that since I already have the spare panel and the system will lose efficiency over the next few years...I could add it then and compensate for the "aging" of the panels. Thoughts?? TIA