There isn't much here other than the AFM procedure. I'll give this more thought when I get a chance.
Everything here is from the references shown below, with a few comments in an alternate color.
The affected side MAIN AC BUS should be powered.
L BATT CHRGR: LEER. LPDB, L MAIN AC
R BATT CHRGR: REER, RPDB, R MAIN AC
(1) Affected BATT CHRGR CB . . . PULL
If both Main Batteries are turned off, the EBHA and UPS batteries will illuminate on the overhead panel. This is simply for aircrew awareness and no change to EBHA and UPS Batteries has occurred.
Selecting the Right Main Battery to OFF will cause the APU to shut down if the APU is operating. APU start is not available with the Left or the Right Main Battery OFF.
Gulfstream GVII-G500 Airplane Flight Manual, Revision 4, August 29, 2019
Gulfstream GVII-G500 Production Aircraft Systems, Revision 3, July 15, 2019
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