New Member Sharing my system

I am new to solar power and have a lot to learn. I am a retired Technician/Engineer (Electronics /Tech, Computer/Electrical and Radar Engineer) living outside Tucson AZ.  I have a Parallel set of 12000XP's connected to 24 540 W bifacial panels (2 strings of 8 and 2 strings of 4, all set to 32 degrees elevation at 175 degrees south) with 5 EG4 48v batteries in parallel in a rack. I am hoping to take my entire house off grid, but will do it in stages. 

I completed the first stage yesterday, When I moved 1 (of 2) 100 amp subpanels (washer/dryer/water heater/water softener/some lights/outlets) from the grid to the solar. I moved the second 100 amp subpanel (garage electrics, welders/wood working equip/compressors, etc). I also moved my pool pump room (a 50 amp heater circuit and a 30 amp subpanel for the pumps/lights/control system). I ran this two nights and the only big hit I saw was the water heater (3000W for 15 minutes at 3am).  Both mornings I met the rising sun with 80% SOC.  When the pool heat pump kicked on I suffered the code 28.  Found my 12000xps had different (and older) firmware.....updated it and problem went away.

Stage 2 (this week), I will move the rest of the house EXCEPT the 3 ton AC from grid to solar (about 20 more circuits). I intend to let this run for a month so that I can see how the system is sized (i.e. do I need more panels or batteries?) and also to get a clean bill from the electric company of just the solar (in July in Tucson) to help make sure the math shows I have enough solar/batteries.....

I wish a good tutorial existed for settings on the 12000xp in parallel.....

Thoughts?