Got the model. It's a CyberPower OL2000. Basically the older model of this one https://www.amazon.com/CyberPower-OR2200PFCRT2U-Sinewave-2000VA-Compatible/dp/B003OJAHW0So are those four 6V batteries wired for 12V? or 4 12V? What size can fit in there?
This is how the batteries are wired for it.
I believe I have the cables for the batteries as well.
Yep,I plan to read some too. Good article,
A new paper on the topic: https://link.springer.com/article/10.1007/s11235-017-0287-2
Haven't had more than time to skim it, but it seems to have some interesting new stuff about antennas and digital signals. Way more than the usual "hang a dipole 10' up and enjoy" ham presentations.