If you disconnect the Tri pos from the battery power the display goes black. Restore 12v to the Tri and you get your three zeros. The AH counter has reset even if you have disabled auto-reset. But your programmed settings are still good, such as that auto-reset disabling.
Your rig's battery disconnect can leave the LP alarm and radio memory still on. Plus some other items remain live. You can attach the Tri 12v line either side of the disconnect switch, so on the battery side the Tri display stays lit, and is another parasitic draw. No big deal.
If you need to cut off the parasitic draws that badly, you disconnect the battery bank itself (But first disconnect your solar panel from the solar controller using the switch you cleverly installed for doing that.)
