Rainboe, it seems we are misunderstanding each other.
vopz stated that the battery bus is deenergized if the battery switch is in the OFF position AND the stby power switch is in AUTO.
He also posted a website with a simple simulation of the electrical system.
After trying that site, I noticed that the stby power switch does NOT have an effect on whether or not the battery bus is powered instead, according to that site, the battery bus is powered as long as the battery switch is in the ON position; if the switch is in the OFF position, the battery bus is de-energized. The simulation therefor acts differently than what vopz stated. That's all what my last reply stated.
And, to resume, I still have no clear knowledge of when the battery bus is powered. My schematics are too simple; vopz and the simulation contradict each other and I haven't received a clear reply as to what conditions must be met for the battery bus to be powered.
Kind regards
Mark