Our Garmin echoMap 50s chartplotter was occasionally shutting down, and when I finally noticed that it mostly happened when the autopilot (ST4000+) was engaged, I tested the GPS plug voltage and saw voltages in the 11s and even briefly 10s as the autopilot motor operated. I suspect having the refrigerator going at the same time wasn't helping, as the problem stopped once I turned off the fridge while sailing.
Is this kind of momentary low voltage normal for our situation? Wiring issue? Battery issue? Our house bank is two group 27 flooded batts.
Is this kind of momentary low voltage normal for our situation? Wiring issue? Battery issue? Our house bank is two group 27 flooded batts.