Hello there trot
I pondered about the same thing some time ago. What is written in the manuals are of course true, but the displayed schematics are a bit misleading.
If you see the schematics in front of you there is a switch between TR3 and the battery bus that opens when you select the battery switch to OFF.
You can check out this diagram for visualization:
ElectricalDiagram
So.. in your stated conditions you indeed get:
- Switched hot bat bus unpowered
- Bat bus unpowered
I hope that helps
