Never thought about it that way.
Yes. I actually never thought of that, thank you. I was going to use the TP6048 hanging on the wall unused as another charge controller and to run dump loads but the SRNE would make more sense. I could pull another feed from the ground mount and split it to separate MPPTs so I'm not clipping, every bit of production counts in the winter.
I have two 3000watt yellow EG4 ones but one has been off for months. It kicks on every morning and blasts 2500 watts of solar into the batteries then turns off at night (inverter is off)
I have it cuz I have some 240volt things, however I don't use those that much so I just leave it off.
Eventually I'll get some 240v minisplits so I'll need it on 24/7 but until then that is how I've used it, for months, and it has worked great
so that leads me to thinking I'll leave these two how they are and just get some other inverter in the future here when I need more watts and just leave them as battery power
I've also noticed that the one running reads the battery voltage 0.1 - 0.2 lower than the other one not running so when the one running draws higher current it is drawing from the second inverter, not the batteries. So the batteries are untouched even if it uses more watts than available from it's solar array. It'll use the other AIO's solar array basically (confirmed watching the BMS and the inverters and all that)
So yea I definitely recommend doing it. It seems really nice way to at least use what you already bought.
The only downside is if you pull more watts than what your inverter can supply, then maybe you'd want as you say your other inverter also running lol but IMO it's easier than making an entire other breaker box and all that other crap
now IDK if all inverter/charge controller AIO things can do that, but it seems many of them can with the "inverter" part turned off
All you do at that point is set their charge / float voltage and you are good to go I guess.
Then you can have a bunch of separate arrays.
My current ones are laying on the ground but for this new SRNE (or the 6000XP but I lean more toward the SRNE now that it has parallel) I will get some better panels like the ones you have, 300-400 watts and then put those in better locations.
My current ones are with some $35 used 250 watt panels