Originally Posted by High Wire
Comment- An LED anchor light draws about 0.1 amp and should last a month or more on any decent battery.
I was on the trip for 10 days, so the boat was on hook and only anchor light on. This time however, I turned off the Inverter, and everything else. Nothing was running.
The voltage was 12.4V on the batteries. This is way different that last time, when it was 11.6V after my return. So, something was using power, because the anchor light is not significant.
After running the generator for an hour, I turned everything off again. Coming back to the salon, I could hear something running. It turns out that the propane heater's fan was on. It is very quiet, so it is possible that this fan was draining down the batteries before. I might have left it on, when I tested the heather.