Alternator and Battery switches- separate or combined?

[GyroF-16]

I’m upgrading my F1 Rocket’s electrical system.
I currently have a Battery switch, an Alternator Field switch and a Generator enable switch for a Monkworkz generator.
I intend to replace them with locking toggle switches, and am contemplating a 3-position switch with OFF - BATT - ALTERNATOR positions.
Then a separate locking toggle switch for the generator.

I’m trying to think of disadvantages of the 3-position switch vs a separate BATT switch.
In what situations might I need to turn off the battery, but leave the alternator on?

 

[Mark Dickens]

I have a separate battery master and one SPDT on-off-on switch for the alternator (top position) and the Monkworkz generator (bottom position). It doesn't make sense to cut the battery out of the loop. You would lose the ability of the battery to not only charge, but absorb current fluctations from the noisy alternator

 

[Toobuilder]

I’m upgrading my F1 Rocket’s electrical system.
I currently have a Battery switch, an Alternator Field switch and a Generator enable switch for a Monkworkz generator.
I intend to replace them with locking toggle switches, and am contemplating a 3-position switch with OFF - BATT - ALTERNATOR positions.
Then a separate locking toggle switch for the generator.

I’m trying to think of disadvantages of the 3-position switch vs a separate BATT switch.
In what situations might I need to turn off the battery, but leave the alternator on?

I have exactly this architecture on my Rocket. I cant think of any scenario that I would want to select the battery off and leave the alternator on

 

[Scott Hersha]

I have exactly this architecture on my Rocket. I cant think of any scenario that I would want to select the battery off and leave the alternator on

But there might be plenty of times when you want to select the battery on and the alternator (field) off. No reason to energize the field when you’re just checking stuff on the ground with the engine not running.

 

[Toobuilder]

Yes, and the three way toggle does exactly that

 

[BobTurner]

I remember all the single engine Cessnas had a split alt-bat switch. You could turn on the battery only, but if you tried to turn on just the alternator the switch dragged the battery switch on, too. So at least the Cessna engineers thought alternator on/battery off was not a good idea.