Quote:
Originally Posted by gasman
At 12.3 your battery will be at about 50%, way too late for a warning.
Set it at about 13.5 if you want to know when your alt. goes off line.
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12.3 is what mine is set for. Your actual battery OCV is going to be 12.5-12.7, which is plenty of warning. My OCV is 12.8-12.9 after sitting for a week, which is a fully charged battery. I don't want to have to disable a warning for low voltage everytime I turn the GRT on. By load shedding in flight, one will have plenty of time to get on the ground if the battery is in good shape. Buy a load tester from auto parts store and keep a log at each annual.
I have 6 ga wire to alternator going through 60A current limiter from B&C on firewall. I charge two(pc925 & pc680) batteries after startup. I usually wait about 2 minutes to connect aux. Routinely see 55-60A alt load. I believe replacing your 8 ga wire did a bunch to help out. Higher resistance in smaller wire= more heat and less voltage.