Thank you all for chiming so far...
I am definitely open to getting new batteries, I simply have been putting that off as long as possible to let technology make a few leaps. The main batteries I list above are approaching 15 years or more of service. Maybe the lifpoe battleborn or some such custom lithium build, though I get snow here about 2-3 weeks a year and would probably be better served value and performance wise with sealed lead carbon? I looked into salt water based batteries though they seem to not be as featured locally as they were for a while.
As far as the hodgepodge goes this is certainly a big wattage upgrade… I have a few options currently
I have several low end charge controllers simple 20amp sunguard and some 40amp and 100amp mppt which are self sensing 12v or 24v I have a couple 12v inverters 1000 and 2000 watts and one 1500 watt 24v inverter as well. I basically have 3 small systems I use to recharge tool batteries, charge laptops and run basic appliances when needed. Most of my lighting is rechargeable 5v. led. so not tied to staying 12v though it is preferable. I don't have a generator at least not a fossil fuel one (gas or propane) I do have a spin bike that I can charge 12v with or potentially from the car alternator. I would like to keep the costs down though I realize bumping up the KWH's and watts means replacing some of my existing tech collection.
The idea of higher voltage could be a good line to follow for it would allow me to place the panels at a spot with full sun 9am to 7pm most of the year. Say up to 200' run to areas of use. The array as installed before (as grid tied) seems to have been 3 sets of 10 240v 21 amps though I am not sure.
Now at present I have a CNC machine down at a neighbors that is on the grid, if I could get enough power to run that up here, that would be great as well. Say a small sunny day use wood shop barn set up with plug in power tools. That could maybe justify a different inverter/charge controller (Presently all my tools are 18v and 20v battery)
if I do go with two systems from the panels one set of panels will go to my neighbors to help them out since they don't make it through winter with their existing 9 panels without a generator . they have an outback flexmax60 pv mppt charge controller. (thus my idea of 12 for panels them and 18 panels for me)
As far as the sunny boy SB5000US PV grid tie inverter… tricking it to think it was tied to the grid seems to be a hack people have done, though wisdom says I'd be better served if I could maybe just sell or trade it… A person not to far from me has them listed for sale for $750 refurbished, this one is still in working order so it should be worth something at least that might get me toward a good offgrid charge controller/inverter.