Hi, Leif -
On Wed, Jun 22, 2011 at 10:32:32AM +0200, Leif Thomsen wrote:
> Hi Ben,
>
> Nice to have You here at the electric side of boating!
It's always been a thought in the back of my mind, anyway. Having this
beautiful fast boat with this marginal, leaky engine is pushing me right
over the edge, though.
> 13,5 m length, trimaran style, steel hulls. 7 ton. In center hull 1 fork
> lift traction battery 775 Ah, 48V (new - half price from shut down
> factory), 12 pcs 210W solarpanels,
All I can say is "wow". That's a whole solar farm!
> Morningstar solar charger 48 V, + 2 pcs
> 210W panels charging 160Ah, 24V gel batteries (ledlights, and other
> electronics, one 4kW inverter (swiss made Studer)48V to 230V AC (and up to
> 10 kW in short periods) feeding 2 standard 3- fase industrial 2,2 kW
> engines (one in each outer hull) reduction 2-1 via cogged belts. Engine
> controller = standard idustrial VFD. Industrial = better prices. High
> voltage = lower losses and smaller cables.
I've heard of someone working with 230 or 440VAC motors for this kind of
application. I just have to wonder about the efficiency of chopping DC
at those power levels, though.
> Done some initial tests. Sofar
> so god. Will keep the list updated if there is interest. Of course there
> is different needs between a houseboat (3-5 knots) in sheltered waters and
> a offshore cruiser, but some basic ideas should be valid in both
> situations.
Yes indeed. Thanks for your input!
Ben
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