Saturday, February 19, 2011

Re: [Electric Boats] picking a vendor

 

My 360lib system is the 48 volt variety and it came with all the cabling already crimped and shrinked. They are huge.  

Sent from my iPhone

On Feb 19, 2011, at 1:18 AM, James Sizemore <james@deny.org> wrote:

 

At 360 Amps  The gauge should be 0000 AWG    Which I'm sure is not easy to crimp.  





On Feb 19, 2011, at 2:29 AM, James Lambden wrote:

 

When picking an electric drive be aware of how the drive is rated.

Is the motor rating continuous or intermittent?     Intermittent ratings can be over twice as high as a continuous rating. 

The continuous rating should be when the motor reaches its continuous operating temperature.    This usually happens after about 1 hour of continuous operation.

What is the continuous operating temperature of the motor?    A Mars motor can run up to 150 Celcius winding temperature, though I don't like to run them any hotter than 100 C.    

I think that as a group we should determine how motors are rated, and get a level playing field going. 

Also be careful as to what the current is on the DC battery cables.    Excessive current can create hotspots on cable ends and even warm up the cables the mselves.   Plus running at high currents is problematic from an efficiency standpoint.  

10 KW at 50 volts is 200 amps.   Most likely this will be higher because of battery droop unless it is backed up by a generator.   I wouldn't recommend running any more than 125 amps continuous down a 2/0 cable, and preferably only 100 amps.    You are going to have to double up cables or get some really big cables if you are thinking about running 300 amps continuously to maintain ABYC standards and insurability of the vessel. 

James

Propulsion Marine



On Feb 19, 2011, at 12:04 AM, James Sizemore wrote:

 

The only advantage I see that Electric Yacht has over the others right now is in one category. The 360ibl is the most HP (17SHP) at 48 volts on the marine market.  So for those with large boats that want a drop in option then EY is the only option that I know of.    Around 10 SHP  most of the rest have good options and all of them have 5SHP options.  

If any one knows of other 20HP or more 48volt kits,  I would personally like to know.    

On Feb 18, 2011, at 5:11 PM, Eric wrote:

 

John,

I don't see that Electric Yacht offers any particular benefit that the other vendors often mentioned on this list do not offer as well. They all have "turn-key" products with proven track records, high quality products, documented performance, warranties and satisfied customers.

I think that each reader should research each of the major vendors like Electric Yacht, Advanced Marine, Annapolis Hybrid (ASMO), Solid Nav or Propulsion Marine and choose the one that meets their personal selection criteria. Keep in mind that each of these vendors are members here too.

If you have installed a particular system in your own boat, then you should discuss your direct experience. But you should be careful to not declare any particular solution as "better" unless you've got first-hand experience to back that up.

I know that the group owner is not interested in making this group a place for dealers to troll for customers.

Fair winds,
Eric
Marina del Rey, CA

--- In electricboats@yahoogroups.com, John Raynes <johncraynes@...> wrote:
>
> I am a dealer for "Electric Yacht" but that is not what is important here.
> Look at "Electric Yachts" track record, quality, performance, warranty and
> experience customers have are all reasons to buy their product.
>
> John Raynes
> Electric Boat Drives
>
>
> >
> > John,
> > Why are you suggesting Electric Yacht ? What are the benefits compared to
> > the other "turn key" Vendors mentioned on this forum ?
> >






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