Hello Bob Dunn,
If voltaga reading is not accurate, you can calibrate voltage. Or please ignore menu#5.
Both menu 1 and menu 3 are for battery specification setting. If you progarm menu 1, please don’t program menu 3.
Ther are some fixed options in menu 1. If you can’t find suitable battery type, just program menu 3. You need to set minimum voltage and maximum voltage for battery.
If no suitable