So just to clarify.
"AUX LOAD ON" means put the aux loads on when then battery is above the set percentage. So setting the aux load on to 50% means it will only put the aux loads on when the battery state of charge is above 50%.
"AUX LOAD OFF" means put the aux load off when the battery is below the set percentage. So setting the aux load off to 50% means it will put the aux loads off when the battery state of charge is below 50%.
Also, aux loads will only be supplied with solar power, and not with power from the battery. I there a way that the aux load can use power from solar and battery and not from the grid?
The only way I found to have the aux load be supplied from battery power is to put the grid power off.