If you run with both batteries connected, a failure that should have blown one battery fuse with either blow both fuses or none at all. Both results are bad.

Cheers,
...david


On Wednesday, April 15, 2020 at 11:04:01 AM UTC-4, kinsell wrote:
Mark can use his procedure if he wants, or better yet just keep both
switches on an forget about flipping switches. Unless he's a former 747
captain, who likes to fiddle with lots of switches.