Carter:
Enjoyed reading your blog and project. At times kicking back in the cockpit I've wondered what a deck full of solar panels might do on my boat. Thanks for leading the way with that idea. I was wondering how you have configured all those solar panels. I'm assuming they are all 12 volts. At what voltage have you configured them at the input to the controller? I think you mentioned your motor/batteries were 48 volts.
Capt. Mike
http://biankablog.blogspot.com
From: Carter Quillen <twowheelinguy@yahoo.com>
To: "electricboats@yahoogroups.com" <electricboats@yahoogroups.com>
Sent: Saturday, February 23, 2013 6:09 PM
Subject: Re: [Electric Boats] Re: Fully electric, turn key boat - available yet?
Luka,
Cruise ships have had electric serial hybrid drive systems for years and I don't know that much about it but I'm guessing it must be a strong trend with newer large ships. As far as the cost competativeness, depending on the system you install and where you buy it, electric is already cheaper. The entire system for the Arc cost about $12K in parts including solar panels(I paid $7k for what you can now get for $5.5K), motor, controller,wire, relays,quickcharger($2250 total), aluminum for the support structure and linear actuators, ($2500) , batteries($1000), Honda EU2000, ($1000).
Admittedly my 7kW golf cart motor on steriods is a bit underpowered for a 20 ton boat and a shunt motor is about the least efficient choice there is but it was hands down the most torque per dollar I could find for my money and it pushes the boat smartly in calm waters. It was sized more to match the capacity of my solar array than to push the boat in heavy weather, for that I left the diesel in place so I'm cheating a little bit. But still, you can hardly buy a 20hp diesel for what I've got in the system and mine comes with the never ending gas tank option. Also, the hardware is not marine rated but the motor and controller seem to be constructed well for the environment. Most of it's made out of aluminum and I changed out some mild steel pieces with stainless. Time will tell but the golf cart stuff has a reputation for being pretty robust. For the DIY, electric propulsion is already cheaper than ICE right now.
I'd say electric propulsion has arrived and it's only going to get better in the future.
Carter
PS:And everything on the boat is made in America (except the Honda and the linear actuators).
From: luka_tema <no_reply@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Thursday, February 21, 2013 3:12 AM
Subject: [Electric Boats] Re: Fully electric, turn key boat - available yet?
To: electricboats@yahoogroups.com
Sent: Thursday, February 21, 2013 3:12 AM
Subject: [Electric Boats] Re: Fully electric, turn key boat - available yet?
Hi Guys,
This is turning out to be quite a good argumented conversation!
I work in the electric propulsion industry and from what I see the interest for e-propulsion is growing every day, and so is the number of electric boats.
Here is one of the projects I worked on:
http://www.youtube.com/watch?feature=player_embedded&v=g1MWv_QMEOc
The electric propulsion system is not that much more expensive that a regular marine inboard diesel engine, the price of the source (battery, genset, or both) increases the initial cost.
But consider this as an investment, because with batteries (or a serial hybrid) you are buying a much more efficient vehicle and your exploitation cost (fuel, maintenance) will be significantly lower than with a diesel powered boat.
It is true that the battery pack is slowing down the market to expand more quickly, mainly because of battery weight or price.
BR
Luka
--- In electricboats@yahoogroups.com, "LizN" <enalle@...> wrote:
>
> Hi, all - first post but I have been lurking for years. And, after reading all your posts, I have realized that I don't have anywhere's near the knowledge necessary to convert a boat. I don't even know how to sail. I have crewed on power boats though, so I know a little about them. My question is, is there such a thing as a fully electric, or a diesel hybrid that one can buy, all ready to go? I drooled over this boat for quite a while - http://dsehybrid.com/ - but it looks like it is no longer offered, so either the market, or existing technology, or something wasn't ready yet. Is an electric power boat, with solar or shore power to recharge the batteries possible today? That one could spend some weeks on putting up and down the ICW, maybe even heading around the Caribbean. Retirement is a few years off yet, but that's my dream. I wouldn't need much power, although I would need enough to get out of the way, or get somewhere relatively safe in case of storms.
>
> Any thoughts and comments are appreciated - your collective knowledge is incredible, I salute you!
>
> Liz
>
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