So some of my setup is predicated by earlier purchases. A number of years ago I bought a 5.5kW/15kW Peak Xantrax inverter and two panels that ironically cost as much as these 22 panels I just purchased.
I was convinced we were headed for some big time social troubles, and having the ability to set up an off-grid electric system would be good to have... just in case. lol.
So as a result that's why I'm using the single inverter setup. It's a 48v to 120v inverter, and finding a matching one to tie into my already purchased one in order to make a 240v circuit is an effort I don't want to try to bother with. If I want to do 240v in the future, I will simply acquire new equipment and then keep the old 120v inverter as a backup.
Also with it being split up as it is, I can use my grid connected circuit to charge up the batteries of the solar/battery circuit if I encounter a long period of no production. As such, I will probably see if I can get a charger that just keeps the batteries from going below 20% as an example, brings it up to 40% and then stops. I'm not sure if I'll find chargers that smart or not out of the box without having to rig something together.
Pulled the trigger on going EV on 10/2016 with a 2012 Leaf SL, traded it in and now I'm a very happy Tesla Model 3 owner.