Hi Mitch,?
Mine is 48v. After adjustment of the prop angle ever so slightly the system is much quieter and now using a victron 712 meter we still have about the same numbers. Above 5kts it starts to ramp up the draw very quickly (I mean its still a logarithmic curve but that¡¯s the dense area under the curve).?
Now I¡¯m wiring up new powerwall style lifepo4 batteries and moving the AGM to be the house bank.?
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On Nov 1, 2020, at 10:27, Mich Pop <michpop@...> wrote:
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Hi Ryan
Those are very good numbers.
We have a similar boat and a much higher consumption.
We are running a 48 V system.
Do you use a higher voltage?
On 27 Aug 2020, at 2:52 am, Ryan Sweet <
ryan@...> wrote:
I am working on a larger write up but thought I would share some results from my first run.
Main concern: it was too loud! I think the cutlass bearing was too worn when I started The project and there was too much motion up and down. I think that the shower is aligned with the motor well, but dad it¡¯s at to much of an angle with respect to the Cutlass bearing. This is also putting pressure on the stuffing box.
So I need to adjust the angle.
But I was able to get some preliminary numbers
The boat is a 1979s 30 foot fiberglass hulled ketch (Rawson 30). ?Hull speed is 6.9ish
Power consumption is almost logarithmic, as expected ~20a @ 3.2kn, ~55a @ 4.5kn, 115a@ 5.5kn
Don¡¯t yet know how much to trust that meter. ??
What do you guys use to monitor battery capacity? I have a little meter that I ordered from Amazon but it recorded 100% wow at the end of the run and when I plugged in the charger, it recorded between 50 and 75% unfortunately the charger doesn¡¯t give me a better number than that.
