FCOM 6.20.12.
And 6.20.9:
"The busses powered from the battery following a loss of both generators are:
· Battery bus
· DC standby bus
· Hot battery bus
· Switched hot battery bus
· AC standby bus, from the battery bus, through an inverter."
If i toggle battery OFF i lost all power from aircraft, it becomes CLD&DRK. Why? Lost of battery power cause impossibility of use STBY power in alternate ops, when STBY power not energizes from ENG gen or APU, and OFF bat switched bus.
Maybe i mistakes? OFF the battery causes disconnect the transfer relay from busses? Thanks. Sorry for my english. ))