Re: [electricboats] When the ideal house voltage please stand up?

Not sure what you are exactly thinking of, but if you are saying why not use a 120V AC motor for propulsion?

The reason would be efficiency. If you are converting from DC (Batteries) through an Inverter(90% Efficiency) to an AC Motor(75-90% Efficiency), that is not as efficient as Batteries directly to a Brushless DC Motor(92% Efficiency).

Also, on boats, you should not use residential wiring or connectors... you have to use marine grade everything.

Typically on a sailboat, you would have a big propulsion battery bank, and have a DC to DC converter, to go from your say 74 Volt propulsion battery bank to 12 volt house power. And most likely have a small 12 volt battery bank that is charged by the DC to DC converter and Solar. Then you would have an inverter for any 110 volt house loads, like a microwave, tv, computer...

 

On Thu, Nov 28, 2024 at 4:37 PM Newt via groups.io <mrkgillis=gmail.com@groups.io> wrote:

Hi all, 

I monitor this group a lot but rarely contribute. That's going to change. While powering over a current over a bar here in Oregon, my v drive ended with a loud bang followed by a grinding noise and no power to the prop. Well I will use this opportunity to go electric. In talking to the thunderstruck guys, they suggest 18 or even 24 kw (40 ft Valiant) . I thought why not just use their reduction drive and go with 120 for the house and the  aux?

Advantages...

More power to aux

Standardized wiring (cheaper)

Home appliances (cheap)

Solar to 120, gen to 120 easy to do. 

Dis

Marine stuff is mostly 12 volt. So will need step down for instruments, radar etc

What do you think...anybody done this? Why not?

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