I am analytical and look at numbers.
As such, the project is expensive but doable.
25 kWhr usable load needs a minimum 30 kWhr battery (similar size as a tesla), and with some margin 40 kWhr.
At 500 $ / kWhr, ==> 20.000$.
At, say, 100 Wh/kg, => 400 kg battery mass.
Thus, its technically feasible, since the motors will be small and light.
The extra battery mass is likely still doable.
I would suggest planning around 100.000$ for systems cost.
Note requirement for proper schematics, survey, a licensed marine engineers write-off on safety etc. as its a commercial vessel.
Perhaps double insulated cables.
In a fjord (Norway) the engineers costs and licensing will be reasonable.
All prices are in line for any other custom commercial, insured, build, in my opinion and in my experience.
Any custom build will have the same safety and licensing costs, anyway.
The last thing you look at, or should think about, is motors, controllers etc.
The first thing you look at is systems cost, legal, engineering practicalities, and any suitable "white-box" technology will slot right in.
All good engineering solutions are pretty much comparable, and any one will work.
The legal aspects are about 2/3 the total cost and work, and should be the overriding focus, in the initial business plan.
In the us, or here in spain, the legal aspects might easily cost more than the 100k budget I mentioned.
In scandinavia, not necessarily.
I can advise further, if there is interest.
Any feedback for this gentleman?
From: electricboats-owner@yahoogroups.com [mailto:electricboats-owner@yahoogroups.com] On Behalf Of Stefán Brandur Jónsson stefan@martolvan.is [electricboats]
Sent: Tuesday, December 23, 2014 9:11 AM
To: electricboats Moderator
Subject: Re: FILE - Welcome
Hi All
I'm Stefan from Iceland, I'm an electronics field engineer by profession and bit of an boat and energy efficiency enthusiast.
My latest project is an feasibility / business plan for an catamaran tourist boat for using in my fjord that is for the most part very shallow, I think that an electric Jet drive would be the best fit where I need to overcome currents up to 8 knots in graceful manner. are there any ones that have some good advice on motor, battery and controller choices. My goal is to go electric only on approx hour trip on approx 25 KW load (max power 2 x 28 KW).
Look forward to comments.
,_._,___
-- -hanermo (cnc designs)
Posted by: Hannu Venermo <gcode.fi@gmail.com>
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