Possibly a minor consideration, but you might want to spend some time looking at wire sizing and number of wires for some of your various installation
If you're looking to run your wiring
inside any tubing or existing raceways from the panels
to the controllers to keep the installation
clean, with your option of 6 panels
to 6 separate controllers you're running quite a few wires. You may have room, but you may not depending on the gauge required (considering run lengths and voltage drops).
I'm not an electrical
expert by any means, but I've been involved in a ton of operations and maintenance reliability
analysis over my career and any solution that landed on 6 parallel systems being necessary due to concerns of reliability
of one of the components wouldn't have made it past the planning stage. A more reliable component would have been the solution.
quality components from a source that will likely be around in a few years (or even interested a week later) to support it beats saving a few $ upfront and possible frustration when troubleshooting or replacing components with premature failures. If I was an electrical
tinkerer I might feel different...I'm not...sorting through the detailed specs and weeding out the Bad vs Good Chinese controllers just didn't do it for me.......I like pretty much plug
and play with good manuals
and then enjoying the cold beer
from my fridges running off the solar
rather than tinkering and looking for YouTube videos to help me get the system working as it was supposed to.
I love the Outback controller I bought and am actually putting one if their Charger/Inverters when we get to NZ.
But I realize it's 'different strokes for different folks'. Good luck either way....you'll love the extra power
and reduced reliance on your engine
of you've got one.