Hi Chuck,
At 11,600 lbs, your boat is just under 6 ton, not 12. As such, any of the 5.5-6kW drive systems will be fine in your boat. While Motenergy lists the continuous rating for the ME0913 (thats the motor in the EY 180ibl) at 180A, that's the input current using the Motenergy controller. Motenergy also lists the motor continuous current at 125A AC which for a 48V system would be 6kW, right around where the other marine drive vendors rate their systems that use the same motor.
So you should check out what some of the other vendors on this group offer, the four that participate here regularly are (in alphabetical order) Advanced Marine electric Propulsion, Annapolis Hybrid Marine (seller of ASMO drives), Electric Yacht, and Propulsion Marine. They all sell excellent products. I chose Propulsion Marine in Santa Barbara when I converted my Cheoy Lee Bermuda 30, I couldn't be happier with the quality of the product and the vendor support.
Depending on the capacity of your charger, your "generator" motoring speed will vary. With my Elcon PFC2000+ and a Yamaha EF2000iS generator, I get 28A at 54V which drives my 10,200 lb, 30' ketch at 4.2-4.3kts. With your much larger generator, you should be able to run a more powerful charger. If you've got 220VAC output, then you might be able to run an Elcon HF/PFC5000 (max draw is 30A @ 220VAC), this charger will produce 87A @ 50V+, or more than 4.3kW. My boat cruises at 5.7kts at 4kW, but your speed will depend on how efficient your drive and prop are. The trick is to match the charger to your generator.
Let me know if you have more questions.
Fair winds,
Eric
1964 Bermuda 30 ketch, 5.5kW Propulsion Marine drive, 8kWh Lithium batteries
Marina del Rey, CA
--- In electricboats@yahoogroups.com, "chuckh" <chuckheb@...> wrote:
>
> Eric, hello
> I have Ben looking into electric conversion for a while and you seem wverynknowledgeable. I too an biased toward electrid as I love my Prius and would like to make my yacht electric as well, but I don't want to make an expensive mistake. Not to mention that my yanmar is aging, but still runs well. I want to cruise with my yacht, a tayana 37. Where I live winds can be light and I might need to motor sail or just motor for days. My tayan 37, a 12 ton yacht, came with a relatively new 8kw northern lighs genset. It seems logical that this could power an electric motor continuously. Electric yacht says I can get 4.5 kts continuous power out of this setup. From your experience does this sounds reasonable. I love the simplicity of going electric and eliminating my yanmar. Does this seem like a reasonable conversions that would truly generate continuous power from the genset. Ism that enough power with the 180 motor or should I consider
> the 360 system
>
> Thanks
>
> Chuck
> SV Mowe
>
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