I have an Autohelm ST30 knotlog installed. I
cruise at 4 knots and max at 5.5 knots. I only have 2
speeds right now. I run at 18 volts or 36 volts. Low
speed range is 8-9 hours. Hi speed is 4-4.5 hours. I
haven't run a constant 8 hours yet. I have done 5 or 6
one hour cruises with lots of power to spare, without
having to recharge. By the way, I am using an extra #27
gel-cell just for my electronics and motor control
circuits. That way I don't waste any of my main battery
power for radio, controlls, speedo, bilge pump, etc.
