I found this comment by John very intriguing:
"But the bottom line is that you have to do an electric conversion because you want an electric boat - not because it makes financial sense."
But this still requires lots of number crunching by the individual. I'm thinking of something more like this, for boat conversions:
At some point (maybe still years from now, with better batteries, etc?) it seems like it might very much make financial sense (for _some_ situations, when considering Total Cost of Ownership, etc., etc.. Caveats apply). But for someone like James, it should would be nice to have a handy-dandy worksheet to fill out that could get him started.
On Thu, Jul 2, 2020 at 4:26 PM Gene gfusch@hotmail.com [electricboats] <electricboats@yahoogroups.com> wrote:
One may also wish to look at Elco's plug and cruise option as they have been making electric boats for over 120 years. https://www.elcomotoryachts.com or https://www.elcomotoryachts.com/product-category/electric-inboards/
Gene
From: electricboats@yahoogroups.com <electricboats@yahoogroups.com> on behalf of Jesper Malmberg jesper.malmberg86@gmail.com [electricboats] <electricboats@yahoogroups.com>
Sent: Thursday, July 2, 2020 12:27 PM
To: electricboats@yahoogroups.com <electricboats@yahoogroups.com>
Subject: Re: [Electric Boats] Electric conversionI'm in the middle of a conversion and if you have not already, take a look at the following.
Thunderstruck-ev.com, this is the cheapest and most DIY solution that I have found anyways, I believe their system is the cheapest out there, but not specifically built for marine use. I think it's also most suited for smaller boats. This is the route I'm going down on my 30 foot sailboat.
Electroprop.com, basically the same parts in their system but as far as I can tell is a bit more custom for your boat.
Electric yacht.com, a more professional system intended for maritime use. It seems good but is about twice the price compared to the two above.
Torqeedo.com, this is probably the most professional option I've seen. But it is very expensive.
Also for inspiration there are numerous YouTube channels out there. Learning the lines, sailing Uma and sailing Saoirse to name a few.
Anyways, this is all just based on my research, and I agree with John, You do this because you want an electric boat, perhaps only for daysailing, it is not a replacement for a diesel. At lest not with today's batteries.... good luck!
/Jesper
On Thu, Jul 2, 2020, 10:37 oak oak_box@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:
James,Start by outlining what you want to do with the boat.
Will you only sail it with minimal aux power to get in and out of the marina? Or do you want to be able to cruise for several hours with the sails down?
What speed are you comfortable with? How long will your trips be?
With that kind of insight, then an expert might be able to make some guesses on the type of motor that would be appropriate.
If you know the motor, and the range / speed you want to be able to go - then you can calculate the size of the battery bank. Then you can start to get an idea of what the cost of an electric conversion will be.
Be prepared: For that size boat, if you want any kind of significant range (and I'm only talking 2 hours or so.... plus a 3rd hour for margin) - the cost of a conversion will most likely exceed the cost of having the diesel replaced.
The advantage of going electric is that maintenance can be considerably less. No oil changes. Probably no impeller changes unless you go with a water cooled motor. You can get rid of a couple of holes in the boat!
But the bottom line is that you have to do an electric conversion because you want an electric boat - not because it makes financial sense.
Hope that helps some.
John
On Thursday, July 2, 2020, 12:02:40 PM CDT, financial@jamesschmidt.xyz [electricboats] <electricboats@yahoogroups.com> wrote:
I have a 1971 CT 41 sailboat with a frozen 50 hp diesel engine. My boat displaces 25700 lbs. Where di I start?
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