Draker
Well Known Member
Recently working on a load analysis for my build's future electrical system, for the purpose of correctly sizing my alternator. This is a pretty simple single alternator, single main battery, small backup battery system. But it has a pretty much fully loaded Garmin G3X setup. Was hoping I could get away with a 40A alternator, but unless I estimated something wrong here, that doesn't look achievable. I cannot squeeze myself under 40A (minus 10% safety margin) in either takeoff or approach configurations.
Can anyone see a flaw in my calculations or reasoning here? If not, it looks like I'd be better off with a 60A alternator than a 40A and will need to pay the weight penalty.
Can anyone see a flaw in my calculations or reasoning here? If not, it looks like I'd be better off with a 60A alternator than a 40A and will need to pay the weight penalty.