Eugene, I'm glad you feel that you can be absolutely clear about... about... about that <rofl>...
I know that AM Solar has been updating the website but hadn't noticed that they've gone to Victron systems. Expensive, but I also would think it would be a very solid way to go. Eugene sure said it: "You can buy batteries or buy systems" - I did the former and I'm still working to get my charging system set up. Half the price of a Victron system, 10 times the work <g>...
Wade, I don't think switching Param 12 is of any help. You'll still use 16/17 the same way for SOC, 18/19 the same way for voltage and 26/29 the same way for temp. If you set 16 for low SOC and 18 for low battery voltage, going down past the setpoint of either one will change the relay state. Same logic no matter how you set Param 12. But if you invert it, the relay is normally held shut instead of sitting open - and going below any setpoint will open it instead of shutting it. That's a convenience for using the relay to drive different systems but it doesn't change the logic.
You'll notice that in the Param 12 section they say that the monitor will use more juice in the normal state if you invert - that's because it's added the current to hold the relay shut.