Just did a quick 3 nm trip to a nearby harbor for a few days. On the return trip I was running under battery only. About halfway into the trip I noticed the battery voltage was down to 47 volts and found one of the 8A4D batteries reading 10 volts. The others were around 12+ volts and within a tenth of a volt to each other. I immediately powered up my Honda 2000 and finished the trip in hybrid mode using my Zivan NG-1 battery charger and not drawing any power from the battery bank. When I got…See More